| 单词 | left ventricle |
| 例句 | He stepped on his switch and said, “There are two lacerations of the myocardium; a one-point-five-centimeter laceration in the right ventricle and a one-point-eight-centimeter laceration penetrating the left ventricle.” American Gods 2011-06-21T00:00:00Z Takotsubo syndrome takes its name from a Japanese octopus trap that resembles the distorted shape of the left ventricle of a heart affected by TTS. Happy events can cause potentially fatal rare heart condition 2016-03-03T05:00:00Z Dilated cardiomyopathy develops when the heart’s ventricles enlarge and weaken, a process that usually starts in the left ventricle. George Michael Died of Heart Condition, Coroner Says 2017-03-07T05:00:00Z When the heart contracts, the left ventricle is squeezed and wrung out like a wet sponge. Increased deep sleep benefits your heart 2023-10-05T04:00:00Z This blood passes through the bicuspid valve to the left ventricle where the blood is pumped into the aorta. Concepts of Biology 2013-04-25T00:00:00Z "Most heart failure is connected to the left ventricle," says Dr Douglas. 'I was told my heart might fail within a year' 2023-04-28T04:00:00Z "This isn't squeezing very well at all, this left ventricle," says Prof Lasserson. NHS crisis: The medics trying to fix the health service 2023-01-16T05:00:00Z Tests soon revealed that she had a rare disease called takotsubo cardiomyopathy, which forces the tip of the heart’s left ventricle to stretch. A Rural Doctor Gave Her All. Then Her Heart Broke. 2022-09-19T04:00:00Z The left ventricle supplies most organs, the extremities, and the brain with oxygen-rich arterial blood. Increased deep sleep benefits your heart 2023-10-05T04:00:00Z The right and left ventricles, in turn, pump blood through the lungs and the rest of the body, respectively. College Physics for AP Courses 2015-08-12T00:00:00Z The mitral valve separates the left ventricle from the left atrium. Biology for AP Courses 2022-06-09T00:00:00Z Grace was born in November 2019 with an impairment in her heart's left ventricle, and became seriously ill in March 2020. Girl receives heart transplant after two-year wait 2022-07-26T04:00:00Z She protested until she saw the medical imagery: a portion of her heart had been paralyzed, and her left ventricle had ballooned. A Rural Doctor Gave Her All. Then Her Heart Broke. 2022-09-19T04:00:00Z This blood then moves into the left ventricle, where it is pumped into the aorta. Anatomy and Physiology 2013-06-19T00:00:00Z Pressure created by the heart's two pumps, the right and left ventricles, is reduced by the resistance of the blood vessels as the blood flows through them. College Physics for AP Courses 2015-08-12T00:00:00Z In this disorder, the muscular walls of the left ventricle — the part of the heart that squeezes the blood into the body — are suddenly weakened, stretched out like an old piece of elastic. Was He Really Having a Heart Attack? 2022-02-03T05:00:00Z A post-mortem found "no less than 38 separate sharp force injuries", including a wound that pierced the left ventricle of the heart. Connor Black murder: Life term for man who ‘gloried’ in friend's killing 2021-10-01T04:00:00Z A golf-ball-sized rotor was attached to his left ventricle to pump blood through a tube and into his aorta. Thousands of patients were implanted with heart pumps that the FDA knew could be dangerous 2021-08-09T04:00:00Z At the base of the aorta is the aortic semilunar valve that prevents backflow of blood into the left ventricle while the heart is relaxing. Anatomy and Physiology 2013-06-19T00:00:00Z The left ventricle increases arterial blood pressure that drives the flow of blood through all parts of the body except the lungs. College Physics for AP Courses 2015-08-12T00:00:00Z The left ventricle is the biggest and strongest chamber of the heart, pumping blood into the aorta and through the body. Note to Future Space Travelers: Prepare for a Shrinking Heart 2021-03-29T04:00:00Z Her M.R.I. results showed signs of scarring and a dangerous level of excess fluid in her left ventricle. For This College Athlete, Covid-19 Was Just the Start of a Nightmare 2021-02-12T05:00:00Z Autopsies found the heart muscle itself often “relaxed and flabby, offering a strong contrast to the firm, contracted left ventricle nearly always present in post-mortem in bodies of patients dying from lobar pneumonia.” Opinion | History tells us what a virus can do to a president 2020-10-04T04:00:00Z From here, blood enters the left ventricle, which pumps it into the systemic circuit. Anatomy and Physiology 2013-06-19T00:00:00Z Calculate the total power output of the left ventricle. College Physics for AP Courses 2015-08-12T00:00:00Z The stent was old and the left ventricle was not growing properly, putting pressure on the right one. Parents' 'petrifying' choice on lockdown heart op 2020-08-08T04:00:00Z These videos were stored along with images containing human-generated tracings that marked the inner border of the left ventricle at the beginning and end of the ejection cycle. AI tracks a beating heart’s function over time 2020-03-24T04:00:00Z I also want to know what the function of his left ventricle is. Opinion | There’s still things we need to know about Bernie Sanders’s health 2020-02-28T05:00:00Z In order to overcome the high resistance required to pump blood into the long systemic circuit, the left ventricle must generate a great amount of pressure. Anatomy and Physiology 2013-06-19T00:00:00Z He’d also been diagnosed with Lyme disease and dilated cardiomyopathy — an enlarged left ventricle. Medical examiner: Two-time Olympian and Marysville native Jarred Rome died from fentanyl 2019-11-13T05:00:00Z They say surgeons repaired his aneurysm and preserved his heart valve, but despite their best efforts to restore full function to his heart, one section of his left ventricle did not respond to further treatment. A loophole in Florida’s Wrongful Death Act 2019-11-10T05:00:00Z Then he accepted from Dellinger a long 18-gauge hypodermic needle and stabbed it into the heart’s apex, clean through the muscle to the cavity of the left ventricle. A terrible crime, a patient waiting for a transplant: The tragic, redemptive journey of one heart. 2019-09-30T04:00:00Z His one-year risk of dying from a heart attack is proportional to his left ventricular ejection fraction — the percentage of blood that is pumped out of his left ventricle with each beat of his heart. Opinion | There’s still things we need to know about Bernie Sanders’s health 2020-02-28T05:00:00Z Both ventricles pump the same amount of blood, but the left ventricle must generate a much greater pressure to overcome greater resistance in the systemic circuit. Anatomy and Physiology 2013-06-19T00:00:00Z The lower part of the left ventricle in the heart, which is the main source of pumping blood throughout the body, balloons during contractions. A woman mistook wasabi for avocado. The shock led to ‘broken heart syndrome.’ 2019-09-25T04:00:00Z Cardiomyopathy affects dogs by thinning the left ventricle of the heart, the last place blood rests before the heart pumps it out, de Jong explained. FDA links 16 brands of dog food to canine heart disease 2019-06-29T04:00:00Z His left ventricle also was enlarged and thickened. Man who died after being stunned had heart failure 2019-06-13T04:00:00Z The left ventricle, in particular, alters with exercise. The Heart of a Swimmer vs. the Heart of a Runner 2019-04-03T04:00:00Z The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left. Anatomy and Physiology 2013-06-19T00:00:00Z The woman’s left ventricle showed normal function a month after the wasabi accident. A woman mistook wasabi for avocado. The shock led to ‘broken heart syndrome.’ 2019-09-25T04:00:00Z It would be implanted to help Edward’s left ventricle, or the main chamber of the heart, pump blood to the rest of his body. Twin brothers support each other after heart failures 2019-04-07T04:00:00Z Caused by intense emotional events, TTS is a rare, temporary condition that weakens the left ventricle and disrupts its normal pumping function. 'Broken heart' syndrome linked to brain's reaction to stress, research finds 2019-03-05T05:00:00Z Exercise, especially aerobic exercise, requires that considerable oxygen be delivered to working muscles, placing high demands on the left ventricle. The Heart of a Swimmer vs. the Heart of a Runner 2019-04-03T04:00:00Z Pressure generated by the left ventricle will be appreciably greater than the pressure generated by the right ventricle, since the existing pressure in the aorta will be so much higher. Anatomy and Physiology 2013-06-19T00:00:00Z "The defendant says what happened was an accident, but the knife went through skin and muscle, under the sixth rib and into the left ventricle of the heart," he said. Lover 'killed in conservatory urine row' 2019-01-04T05:00:00Z The enlarged organ tugs apart the mitral valve, which controls blood flow from the left atrium into the left ventricle. Tiny device is a ‘huge advance’ for treatment of heart failure 2018-09-23T04:00:00Z But her left ventricle was pumping well — a good sign. Where a Sore Throat Becomes a Death Sentence 2018-09-16T04:00:00Z While all of the athletes’ left ventricles filled with blood earlier than average and untwisted more quickly during each heartbeat, those desirable changes were amplified in the runners. The Heart of a Swimmer vs. the Heart of a Runner 2019-04-03T04:00:00Z Although the ventricles on the right and left sides pump the same amount of blood per contraction, the muscle of the left ventricle is much thicker and better developed than that of the right ventricle. Anatomy and Physiology 2013-06-19T00:00:00Z At the emergency room, an echocardiogram showed that her heart was pumping significantly less blood than normal, and her left ventricle was enlarged. A Troubling Rise in Pregnancy-Related Heart Problems 2018-08-13T04:00:00Z Their study found a clear link between exposure to higher pollution levels and larger right and left ventricles - important pumping chambers in the heart. Even low air pollution may damage heart 2018-08-02T04:00:00Z Her diseased mitral valve was limiting the flow of blood to her left ventricle, which is normally the heart’s biggest, strongest pumping chamber. Where a Sore Throat Becomes a Death Sentence 2018-09-16T04:00:00Z Parts of their heart muscles, particularly their left ventricles or chambers, were shrunken and less powerful than in younger people. Exercise Makes the Aging Heart More Youthful 2018-07-25T04:00:00Z Figure 19.8 Differences in Ventricular Muscle Thickness The myocardium in the left ventricle is significantly thicker than that of the right ventricle. Anatomy and Physiology 2013-06-19T00:00:00Z A post-mortem examination found Jordan, from Grays in Essex, died from hypovolaemic shock caused by a stab wound to the left ventricle of the heart. Teen charged with rapper's murder 2018-06-28T04:00:00Z An ultrasound and echocardiogram showed critical aortic stenosis, which restricts blood flow from the heart’s left ventricle to the aorta. KC family holds out hope as baby awaits new heart, lungs 2018-03-23T04:00:00Z She said the left ventricle of his heart was punctured with only one stab wound. Lawyers for Marine call serviceman’s stabbing an accident 2018-03-22T04:00:00Z The umbrella injured the left ventricle of the woman’s heart, and despite an emergency surgery, she died. How a beach umbrella fatally impaled a woman with 800 pounds of force 2018-03-05T05:00:00Z The left bundle branch supplies the left ventricle, and the right bundle branch the right ventricle. Anatomy and Physiology 2013-06-19T00:00:00Z A virus he caught 18 months ago in China apparently caused thickening in the left ventricle of his heart and left some scar tissue. Just how encouraging was Rory McIlroy's 2018 debut? Well, lets tell you. - Golf Digest 2018-01-21T05:00:00Z The changes included thickening and enlargement of the left ventricle, which are considered indicators of possible future heart failure. Weight gain over time is linked to unhealthy changes in hearts 2017-07-21T04:00:00Z The blood returns to the left side of the heart, where the left ventricle pumps the oxygenated blood through the aorta to the rest of the body. Procedures to fix complex congenital heart defects 2017-06-02T04:00:00Z As a result of the procedure, de-oxygenated blood is sent to the lungs through the pulmonary artery attached to the left ventricle while oxygenated blood is sent through the aorta attached to the right ventricle. Utah football coach not overpowered by heart defect 2017-06-02T04:00:00Z Since the left ventricle is much larger than the right, the left bundle branch is also considerably larger than the right. Anatomy and Physiology 2013-06-19T00:00:00Z The patient was a man in his 80s with aortic stenosis, a narrowed valve which was restricting outflow from the left ventricle into the aorta. Robot hearts: medicine’s new frontier 2017-05-23T04:00:00Z Then he inserts a plastic tube that serves as a sling, strengthening the weakened left ventricle. Heart surgeon relocates to Houston after years in Miami 2017-04-10T04:00:00Z The same rare disease that killed his father at 27 is destroying his left ventricle. People with autism, intellectual disabilities fight bias in transplants 2017-03-04T05:00:00Z Another episode of fainting last June led to an MRI scan which showed that the wall of her left ventricle, which is the lower chamber of the heart, was thickened. 'I had this time-bomb inside me' - BBC News 2017-02-01T05:00:00Z During ventricular systole, pressure rises in the ventricles, pumping blood into the pulmonary trunk from the right ventricle and into the aorta from the left ventricle. Anatomy and Physiology 2013-06-19T00:00:00Z Duggins, who’s now 56 and retired after working 32 years for Duke Energy, was born with a condition called Tetralogy of Fallot - a hole in his heart between the right and left ventricles. Winston-Salem man celebrates second chance at life 2016-10-31T04:00:00Z Their right ventricles, one of the two lower chambers of the heart, were noticeably enlarged and did not function as well as the left ventricles both immediately after the marathon-style event and a week later. Do Olympians Get Too Much Exercise? 2016-08-10T04:00:00Z Doctors determined Davis was suffering from enterovirus, which interfered with the way his left ventricle pumped blood. Louisiana, Alabama families meet after heart transplant 2016-04-07T04:00:00Z The left ventricle is the heart's primary pumping chamber, and abnormal ventricular function is a common cause of heart disease, including congestive heart failure, the study authors noted. Waistline May Predict Heart Disease Better Than Weight 2016-04-02T04:00:00Z The left ventricle pumps this blood into the aorta. Anatomy and Physiology 2013-06-19T00:00:00Z "Ejection fraction" -- a measure of how well the left ventricle pumped with each contraction -- also improved, Hammond's team said. Gene Therapy Shows Early Promise Against Heart Failure 2016-03-30T04:00:00Z Their left ventricles also were relatively enlarged though not to the same extent. Do Olympians Get Too Much Exercise? 2016-08-10T04:00:00Z Most commonly, the left ventricle is the target because it does most of the pumping. Artificial Hearts Ticking Along Decades After Jarvik-7 Debate 2016-03-20T04:00:00Z Three-quarters of cases of takotsubo cardiomyopathy, a change in the shape of the heart's left ventricle, which can be fatal, are caused by stress. Moments of joy 'can damage heart' - BBC News 2016-03-02T05:00:00Z This allows blood that is relatively low in oxygen from the right ventricle to flow into the left ventricle and mix with the blood that is relatively high in oxygen. Anatomy and Physiology 2013-06-19T00:00:00Z Specifically, the left ventricle was thicker than normal. Heart Irregularities May Be Linked to Pregnancy Complication 2016-02-22T05:00:00Z A former steroid user, who did not wish to be named, told Inside Out that his liver became inflamed and the left ventricle of his heart was enlarged as a result of taking steroids. Steroids sold illegally via Facebook, BBC investigation finds - BBC News 2016-02-07T05:00:00Z Stress-induced cardiomyopathy occurs when stress hormones weaken the left ventricle, the heart's main pumping chamber. Why Women Should Lower Their Holiday Stress Level 2015-11-22T05:00:00Z His liver was congested, fluid reappeared in his lungs, and his heart’s right and left ventricles were practically destroyed, making it hard for blood to circulate throughout his body. Inside the 50-year-quest to build a mechanical heart 2015-11-04T05:00:00Z The first portion of the aorta after it arises from the left ventricle gives rise to the coronary arteries. Anatomy and Physiology 2013-06-19T00:00:00Z Over the study period, the researchers found that the people’s left ventricle in their heart increased about eight grams in men, but decreased by around 1.6 grams in women. Men and Women's Hearts Age Differently, Study Says 2015-10-20T04:00:00Z Both women and men had decreases in the volume of their left ventricle, the chamber of the heart that pumps blood throughout the body. Men's, Women's Hearts Age Differently 2015-10-20T04:00:00Z These bouts of activity were particularly beneficial for the left ventricle, which is the heart's main pump. Short, Intense Workouts May Help Hearts of Type 2 Diabetics 2015-09-09T04:00:00Z In 2012 Robert received his first LVAD, a device that attaches to his heart’s left ventricle and uses a tiny, continuously moving propeller to help blood flow. The device kept him alive, but was the pain and suffering worth it? 2015-08-03T04:00:00Z The fourth heart sound, S4, results from the contraction of the atria pushing blood into a stiff or hypertrophic ventricle, indicating failure of the left ventricle. Anatomy and Physiology 2013-06-19T00:00:00Z Sputnik Planum is a region along the southern fringe of the left ventricle of the “heart,” now informally called Tombaugh Regio after Pluto’s discoverer. Potential geysers spotted on Pluto 2015-07-17T04:00:00Z However, the mass of the left ventricle increased in men and decreased slightly in women. Men's, Women's Hearts Age Differently 2015-10-20T04:00:00Z The brightest region of all, the “left ventricle” of the heart-shaped bright region, appears to be a topographic depression. Pluto's icy face revealed as New Horizons flyby occurs 2015-07-14T04:00:00Z Or zoom in further on the flapping leaflets of the mitral valve, which controls blood flow into the left ventricle. See How Surgeons Can Mend a Broken Heart Using 3D Body Scans 2015-07-14T04:00:00Z From the left atrium, blood moves into the left ventricle, which pumps blood into the aorta. Anatomy and Physiology 2013-06-19T00:00:00Z They found the higher the blood pressure, the greater the damage to the left ventricle. Keeping Blood Pressure Low in Those Under 50 2015-07-06T04:00:00Z Of those affected, the men experienced enlarged left ventricle walls while the women saw a small reduction in heart function. Surprising finding from heart study: Moderate drinking may have ‘cardiotoxic’ effects in elderly hearts 2015-05-27T04:00:00Z Among men, consuming more than 14 drinks a week -- considered heavy drinking -- was linked to enlargement of the heart's left ventricle wall, the researchers said. 'Moderate'Drinking Might Harm Older People's Hearts: Study 2015-05-26T04:00:00Z Normally, the left ventricle of the heart in animals and people becomes larger and able to contract more forcefully after a period of endurance training. Exploring Why Some People Get Fitter Than Others 2015-04-29T04:00:00Z It arises from the left ventricle and eventually descends to the abdominal region, where it bifurcates at the level of the fourth lumbar vertebra into the two common iliac arteries. Anatomy and Physiology 2013-06-19T00:00:00Z Device parts include a tube placed in the left ventricle to draw blood into the pump. Assist for Congestive Heart Failure 2015-04-17T04:00:00Z The system is guided into the left ventricle of the heart via a catheter that's typically inserted into a leg vein. New Blood Pump System Approved 2015-03-24T04:00:00Z The new research found that these switches were only active in the heart, and, it appears, in the heart muscle of the left ventricle. Scientists Shed Light on Circuits That Control Genes 2015-02-18T05:00:00Z Cells from their left ventricles looked like those from animals that hadn’t run. Exploring Why Some People Get Fitter Than Others 2015-04-29T04:00:00Z Oliver was born Jan. 5 with a heart the size of a 5-year-old child's with a large left ventricle, Otto said. Arizona baby born premature gets heart transplant 2015-02-14T05:00:00Z LVADs are the most common type of mechanical heart pump, used when the left ventricle – one of the heart’s four chambers – is failing in its function: to pump oxygen-rich blood throughout the body. Assist for Congestive Heart Failure 2015-04-17T04:00:00Z In 1999, at fifty, he learned that fatty deposits had substantially constricted the blood flow in a major artery that supplies the heart’s left ventricle. Can AIDS Be Cured? | The New Yorker 2014-12-15T05:00:00Z One mourner whispers that the bullet that killed him remains trapped inside his heart’s left ventricle. The Drug War in Long Island's Hempstead Getto Is the Free-Market With Tec-9s Cells from their left ventricles showed structural changes associated with growth and strength. Exploring Why Some People Get Fitter Than Others 2015-04-29T04:00:00Z A website was created to help educate and raise funds, while beneath the club’s normal uniforms, DeLaGarza’s team-mates wore t-shirts featuring the cause’s symbol: a heart with a Christian cross above its left ventricle. LA Galaxy rally round AJ DeLaGarza after death of his son 2014-09-08T04:00:00Z In a healthy heart, the right and left ventricles – the two lower chambers – work together to circulate oxygen-rich blood throughout the body. Are You at Risk for Heart Failure? 2014-08-05T04:00:00Z “No LVH” meant that the muscle of her heart’s left ventricle wasn’t abnormally thick. Doctors’ use of medical terminology can leave patients poorly informed They showed the chamber of the heart that pumps blood around the body, the left ventricle, was contracting harder an hour after the energy drink was taken than at the start of the study. Energy drinks 'change heart beat' 2013-12-02T05:59:01Z A Still’s murmur is heard when the left ventricle contracts, forcing blood into the aorta, the large artery at the top of the heart that directs oxygen-rich blood to the body. What’s a murmur? Instead of ‘lub-DUB,’ the heart goes ‘whoosh’ 2013-07-15T20:49:46Z Perhaps the extra connections in her white fiber tracts account for her superior visual memory, and maybe her extra long left ventricle explains her poor working memory. MIND Reviews: The Autistic Brain 2013-05-17T18:45:00.530Z The oxygenated blood returns to the heart and enters the left atrium, passing through the left ventricle to the aorta for distribution around the body. Physiology: Beating stroke 2013-01-30T18:23:09.067Z LVADs are the most common type of ventricular assist devices, and they help the heart’s left ventricle pump oxygen-rich blood to the body. HeartWare LVAD Approved By FDA For Transplant Patients 2012-11-20T19:33:34Z The walls of the left ventricle are three times as thick as those of the right, except at the apex, where they are thinner. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z The continued action of the right ventricle forced blood into the pulmonary capillaries, where it was compelled to accumulate in consequence of the inability of the left ventricle to receive and expel it. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z In the writings of Nemesius, bishop of Emissa, we read that the movement observed in the pulse originates in the heart, chiefly from the artery of the left ventricle of the viscus. Curiosities of Medical Experience 2012-03-09T03:00:20.410Z Before the treatment, scar tissue accounted for an average of 24% of their left ventricle, a major chamber of the heart. Cells 'heal' heart attack scars 2012-02-14T00:52:06Z This also contracts, and forces the blood through a valve into the left ventricle. The American Reformed Cattle Doctor 2011-11-14T03:00:19.813Z The septum ventriculorum is concave towards the left ventricle, so that a transverse section of that cavity is nearly circular. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z Welch consequently regards the immediate cause of this form of pulmonary oedema as a predominant weakness of the left ventricle. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z Some of the best examples of simple hypertrophy of the left ventricle are found under such circumstances. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z This increases diastolic pressure, which increases coronary perfusion and oxygen delivery to the myocardium, and facilitates ejection of blood from the left ventricle. No Benefit for Routine Counterpulsation Found in CRISP AMI 2011-08-30T11:53:18Z The ultrasound monitor displays his left ventricle, the valves opening and closing. Teaching Gorillas, Gently, How to Be Perfect Patients 2011-08-23T22:43:08Z By placing the hand on the chest, palpation, the impulse of the left ventricle, or apex beat, can normally be felt just below and internal to the nipple. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z The comparative frequency of oedema of the lungs in man, and the rarity of such extreme mechanical disturbances as those produced experimentally, led Welch to paralyze the left ventricle. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The hypertrophy of the left ventricle brings more of this portion of the heart toward the anterior chest wall. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z In general, patients younger than 63 performed similarly on memory tests, regardless of how well exams showed their left ventricle was working. Heart failure linked to memory problems: study 2011-08-10T19:15:17Z In the heart, oxygenated blood enters the left ventricle and forms a vortex; that structure is important for efficient heart function. Turning point: John Dabiri 2011-05-11T17:20:45.417Z In affections of the aortic valve, the extra work falls on the left ventricle, which enlarges proportionately and undergoes hypertrophy. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z Lungs oedematous, with deep congestion in places, but apparently no pneumonia; about two drachms of clear, straw-colored fluid in pericardium; a few stringy decolorized clots in the cavities of the heart; left ventricle contracted. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The aortic valves are curled and thickened, the heart is enlarged and the cavity of the left ventricle is dilated. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The device, trade name, HeartMate II, pushes blood through the left ventricle. Heart machine keeps man ticking 2011-05-02T15:00:05Z So, he and his team surgically removed about 15% of muscle tissue in the walls of the left ventricle of 1-day-old mice. Young Mammal Hearts Heal Themselves 2011-02-25T00:45:00.273Z Its anterior wall forms part of the anterior surface of the heart, while its posterior wall is chiefly formed by the septum ventriculorum, 130 between it and the left ventricle. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z By prolonging the cardiac diastole and contracting the arterioles it allows the left ventricle to fill, restores the arterial tension, diminishes correspondingly the intravenous pressure, and promotes absorption. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The maximum pressure produced by the systole of the left ventricle of the heart is known as the maximum or systolic pressure. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z It's for people with left ventricles that stop working. Heart machine keeps man ticking 2011-05-02T15:00:05Z The fully recovered muscle tissue within three weeks of the operation, and their left ventricle pumped blood normally within two months. Young Mammal Hearts Heal Themselves 2011-02-25T00:45:00.273Z The left atrium, which pushes blood into the left ventricle, must then work against greater resistance. A Change of Heart Keeps Bears Healthy While Hibernating 2011-02-09T15:11:00Z Clots in the left ventricle are sometimes prolonged into the aorta as far as the brachio-cephalic branches, while those in the left auricle may extend to the pulmonary veins. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z Such states naturally result in increased work on the part of the heart, which as a result, hypertrophies in the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The wound was made by a knife which passed between the third and fourth ribs, through the wall of the heart into the cavity of the left ventricle. The Galaxy Vol. XXIII?March, 1877.?No. 3 2011-01-31T03:00:16.193Z Data from a second trial, a 27-patient chronic heart disease study in Spain, showed a reduction in the amount of damage in the left ventricle. Stem cells in fat may help repair damaged hearts 2010-11-22T17:38:00Z The FDA approved the CRT-D devices for heart failure patients with an abnormality known as left bundle branch block, a condition that occurs when activation and contraction of the left ventricle is delayed. Boston Scientific heart devices get approval 2010-09-16T23:11:00Z On the other hand, the left ventricle of the heart is usually contracted, and contains a very little semi-fluid blood, with perhaps a small and pale clot. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z In this group there is marked hypertrophy and moderate dilatation of the left ventricle with dilatation and nodular sclerosis of the aorta. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The amount of blood your muscles return to your heart determines how well you refill your left ventricle, and that determines how much blood gets pumped to your body. Heiden: Your heart goes from junker to Ferrari with exercise 2010-08-23T19:27:00Z It consists of an electrical device implanted in the chest that draws blood from the left ventricle and pumps it into the aorta, the main artery leaving the heart. Cheney's new heart pump not a miracle cure 2010-07-15T20:38:00Z But by rerouting the blood to take over the job of the left ventricle, the pump relieves pressure on the heart. Cheney Receives Heart Pump 2010-07-15T01:40:00Z A pump is implanted in the chest and attached to the heart's main chamber, the left ventricle. Cheney has heart pump surgically installed; former VP's latest cardiac issue 2010-07-14T22:11:00Z Pathologically the hearts of such persons are found to have the most enormous hypertrophy of the wall of the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z That blood then flows back into the left side of your heart, where a chamber called the left ventricle squeezes really hard. 2010-01-12T05:00:00Z The baby's left ventricle was too small to properly pump blood through his body. 2010-01-19T05:00:00Z This now contracts and fills the left ventricle, which cavity, in its turn, contracts and sends the blood forth on its journey again through the system. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers The Aorta lies in the cavities of the thorax and abdomen, and arises from the base of the left ventricle of the heart. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" The cavity of the left ventricle is much dilated. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Aor�ta, in anatomy, the great artery or trunk of the arterial system, proceeding from the left ventricle of the heart, and giving origin to all the arteries except the pulmonary. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli C. The dog was then drowned, when the freezing point of the blood in the left ventricle was increased to -.29� The Mechanism of Life Now to complete the circuit, this blood must pass once through the left ventricle, the capacity of which is two ounces. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers The walls of the left ventricle are thicker and stronger than those of the right. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) This is a compensating process to accommodate the increased charge from the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The walls of the ventricles are thicker than those of the auricles, and the walls of the left ventricle are much thicker than those of the right. Special Report on Diseases of Cattle In the left ventricle of that organ, near the apex, there is one little atom which is particularly sensitized, and which remains in the body all through life. The Rosicrucian Mysteries An Elementary Exposition of Their Secret Teachings It arises from the left ventricle of the heart. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers The right ventricle of the heart gives rise to the Pul´mo-na-ry artery; the left ventricle, to a large artery called the A-ort´a. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) In all high pulse pressure cases there is increase in the size of the cavity of the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The blood leaves the left ventricle through a single vessel, the common aorta, consisting of the anterior and posterior aortas, which give off the large arteries. Special Report on Diseases of Cattle These are respectively known as the right and left auricles, and the right and left ventricles. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The cavity which is situated on the right side of the heart, is called the right ventricle, and that on the left the left ventricle. Popular Lectures on Zoonomia Or The Laws of Animal Life, in Health and Disease The thicker and more powerful walls of the left ventricle adapt it to expel the blood to a greater distance. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) The hypertrophy of the heart in arteriosclerosis is invariably due to the enlargement and thickening of the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Sear the surface of the left ventricle with a red-hot iron. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. It returns to the left auricle through the pulmonary veins; enters the left auricle, passes to left ventricle, and so on. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use Near its apex, over the left ventricle, was a small soft spot which, to the finger, seemed like the point of an abscess ready to burst. Cases of Organic Diseases of the Heart The great artery that arises from the left ventricle of the heart. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) The apex of the left ventricle is most commonly the site of the aneurysm and rupture occasionally occurs. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Hence the discovery of the course of the blood from the right ventricle, through the lungs, to the left ventricle was in no wise an anticipation of the discovery of the circulation of the blood. The Great Events by Famous Historians, Volume 11 The second sound follows quickly after the first and occurs during rebound of blood in the arteries, causing pressure in the aorta and tensions of the valves guarding its opening into the left ventricle. Special Report on Diseases of the Horse The velum interpositum was very firm; the plexus choroides uncommonly thick, but pale; the opening from the right to the left ventricle large. Cases of Organic Diseases of the Heart H, The opening between the left auricle and left ventricle. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) In the heart no murmurs were heard, and it was difficult to be sure that the left ventricle was enlarged. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Three similar valves were found at the opening of the aorta into the left ventricle. The Great Events by Famous Historians, Volume 11 Hypertrophy of the left ventricle alone increases its length; of the right ventricle alone increases its breadth toward the right side. Special Report on Diseases of the Horse That of the left ventricle was disproportionately larger than the others, but no difference of size could be ascertained between the auricles. Cases of Organic Diseases of the Heart I, The septum between the right and left ventricle. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) Note that the whole anterior surface of the heart is occupied by the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The author considers that the left ventricle is empty of blood—as indeed it is after death—and is the source of the innate heat and of the absolute intelligence. The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield The valves of the right and left ventricles wore thickened, from congestion of very minute veins, and were granular to the feel. An Investigation into the Nature of Black Phthisis or Ulceration Induced by Carbonaceous Accumulation in the Lungs of Coal Miners The left ventricle was enlarged, about three times thicker and much firmer than usual. Cases of Organic Diseases of the Heart With one throb, the blood is sent from the right ventricle into the lungs, and from the left ventricle into the aorta. A Treatise on Domestic Economy For the Use of Young Ladies at Home and at School In the pure type, there is hypertrophy only of the left ventricle without dilatation of the chamber. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z It treats of the pericardium and of the pericardial fluid and perhaps of the musculi papillares, and contrasts the thickness of the walls of right and left ventricles. The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield Summarising the course of the circulation, starting from the right ventricle, we have-- pulmonary artery, pulmonary capillaries, pulmonary vein, left auricle, left ventricle, aorta, arteries, and systemic capillaries. Text Book of Biology, Part 1: Vertebrata Near the apex, over the left ventricle, was a soft spot, similar to that found in the preceding case. Cases of Organic Diseases of the Heart The heart, he considered, was the seat of life, and he observed that its left ventricle is smaller and thicker than the right. Outlines of Greek and Roman Medicine This is a compensating process to accommodate the increased charge from the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Here it collects while the ventricle below is emptying itself, then pours down between the valve flaps through the opening to the left ventricle. A Handbook of Health Third step—Expansion; implied motion, which from the organism must conduct the blood to the left ventricle of the Heart. Theory of Circulation by Respiration Synopsis of its Principles and History The parietes of the heart, especially of the left ventricle, were greatly thickened, and somewhat ossified near the origin of the aorta. Cases of Organic Diseases of the Heart Rupture from disease usually occurs in the left ventricle; rupture from a crush is usually towards the base and on the right side. Aids to Forensic Medicine and Toxicology Aortic incompetence with hypertrophy and dilatation of left ventricle 61 13. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The left semilunar valve is around the opening of the left ventricle into the aorta, and is similar in all respects to the right semilunar valve. Physiology and Hygiene for Secondary Schools Without such a power, no perceptible cause exists sufficient to move the blood onward to the left ventricle. Theory of Circulation by Respiration Synopsis of its Principles and History The heart consists of four chambers or cavities, two forming the right half, the right auricle and right ventricle, and two forming the left half, the left auricle and left ventricle. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada After birth, the heart discharges the blood from its right ventricle into the lungs; and after passing through these it is emptied into the left ventricle: thus the heart opens the lungs. Angelic Wisdom Concerning the Divine Love and the Divine Wisdom It has been determined that the pressure in the brachial artery is almost equal to the intraventricular pressure in the left ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The walls of the ventricles are much thicker and stronger than those of the auricles, while the walls of the left ventricle are two or three times thicker than those of the right. Physiology and Hygiene for Secondary Schools A, the right ventricle; B, the left ventricle; C, the right auricle D, the left auricle; E, the aorta; F, the pulmonary artery. Object Lessons on the Human Body A Transcript of Lessons Given in the Primary Department of School No. 49, New York City From this cavity it passes into that of the left ventricle, from which the cycle once more begins. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada Jurgens reported in Berlin, February 1, 1882, an autopsy on a child who had lived some days after birth, in which the left ventricle of the heart was found completely absent. Anomalies and Curiosities of Medicine They are the heart, the left ventricle, the very vital part of the house. Excursions The left ventricle forces blood through all parts of the body and back to the auricle. Physiology and Hygiene for Secondary Schools The blade pierced the left ventricle, about the middle, a good inch and a half. The Loudwater Mystery The semilunar valves surround the opening from the left ventricle into the aorta and keep the blood from flowing back. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada There is an old record of a person dying of intestinal worms, one of which was found in the left ventricle. Anomalies and Curiosities of Medicine One of them, of the size of a small nutmeg, occupied the left ventricle; the other, which was still smaller, was found at the base of the right ventricle. The Dog Locate the right auricle and the right ventricle; the left auricle and the left ventricle. Physiology and Hygiene for Secondary Schools The heart may now be turned over, and the left ventricle laid open in a similar manner. A Practical Physiology Dyspepsia, arterio-sclerosis, enlargement of the left ventricle of the heart and a great quantity of urine with low specific gravity are common. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada Buck mentions a case of hydatid cysts in the wall of the left ventricle, with rupture of the cysts and sudden death. Anomalies and Curiosities of Medicine The walls of the ventricles, and particularly of the left ventricle, were very thick. The Dog Cut off the end of the left ventricle about an inch above the apex. Physiology and Hygiene for Secondary Schools The great artery that rises up from the left ventricle of the heart. A Practical Physiology The mitral valve guards the opening to the left ventricle from the left auricle. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada Bowling gives a case of gunshot wound of the shoulder in which death resulted eleven weeks after, the bullet being found in the left ventricle of the heart. Anomalies and Curiosities of Medicine The cavity of the left ventricle was very small; there was evidently a concentric hypertrophy of these ventricles; the left valve of the heart was of great size. The Dog Dividing this by five ounces, the quantity discharged by the left ventricle at each systole, gives fifty- eight pulsations as the number necessary to transmit all the blood in the body. Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics There are, therefore, the right and left auricles, with their thin, soft walls, and the right and left ventricles, with their thick and strong walls. A Practical Physiology The valves that control the opening from the left auricle to the left ventricle. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada There is an instance in which a man ran 400 paces after penetration of the left ventricle, and lived for five hours. Anomalies and Curiosities of Medicine The whole of the blood driven out by the left ventricle at each of its contractions, passes into one large canal called the aorta. The History of a Mouthful of Bread And its effect on the organization of men and animals As the left ventricle drives the blood so much farther than the right, it is correspondingly thicker and stronger. Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics From the right ventricle a large vessel called the pulmonary artery passes to the lungs, and from the left ventricle a large vessel called the aorta arches out to the general circulation of the body. A Practical Physiology The cavity of the bulb is divided into two lateral halves, the pulmonary-artery bulb, that opens into the right ventricle, and the aorta-bulb, that opens into the left ventricle. The Evolution of Man — Volume 2 Johnson mentions rupture of the left ventricle in a paroxysm of epilepsy. Anomalies and Curiosities of Medicine The separation of the two kinds of blood takes place in the heart, it is true, and it is really true arterial blood which the aorta carries away from the left ventricle. The History of a Mouthful of Bread And its effect on the organization of men and animals Hames tells me there is weakness and some enlargement of the left ventricle, which is pretty much what I expected. Life and Letters of Thomas Henry Huxley — Volume 3 The four pulmonary veins bring back bright, scarlet blood, and pour it into the left auricle of the heart, whence it passes through the mitral valve into the left ventricle. A Practical Physiology From here the blood returns, as oxydised or arterial blood, through the pulmonary veins to the left auricle, and is forced by the left ventricle into the arteries of the body. The Evolution of Man — Volume 2 There was a fibrinous clot in the left ventricle. Anomalies and Curiosities of Medicine The two great compartments are called ventricles, the two small pouches auricles, and they are also distinguished as being on the right or left side;—right ventricle, left ventricle, right auricle, left auricle. The History of a Mouthful of Bread And its effect on the organization of men and animals I am to go and devote myself to coaxing the left ventricle wall to thicken pro rata—among the mountains, and to have nothing to do with any public functions or other exciting bedevilments. Life and Letters of Thomas Henry Huxley — Volume 3 As soon as the left ventricle is full, it contracts. A Practical Physiology The left ventricle sends its charge into the aorta, and through this by the arteries to the body at large. The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) Holly reports a case of pistol-shot wound through the right ventricle, septum, and aorta, with the ball in the left ventricle. Anomalies and Curiosities of Medicine Anything that increases the peripheral resistance causes the left ventricle to hypertrophy. Disturbances of the Heart A lesion of the left ventricle was the immediate physical cause, although brooding over Aileen was in part the mental one. The Financier, a novel The longest route a portion of blood may take from the moment it leaves the left ventricle to the moment it returns to it, is through the portal circulation. A Practical Physiology When the left ventricle ceases to act, to contract, to pulsate, the pulse in the arteries also ceases; further, when this ventricle contracts languidly, the pulse in the arteries is scarcely perceptible. The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) At the side of the left ventricle the rent was twice as large and lined with cicutricial tissue. Anomalies and Curiosities of Medicine Under this treatment of digitalis, rest and regulated diet, a dilated left ventricle with a systolic mitral blow often becomes contracted and this regurgitation disappears. Disturbances of the Heart It acts specifically for good, and it has its greatest success in the valvular lesions that cause enlargement of the left ventricle, on which it acts the most intensely. Disturbances of the Heart These valves, when shut, prevent any backward flow of the blood on the right side between the pulmonary artery and the right ventricle, and on the left side between the aorta and the left ventricle. A Practical Physiology The left ventricle I call that which is distinct in office, not in place from the other, that one, namely, which distributes the blood to the body at large, not to the lungs only. The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) Barth has collected 24 cases of spontaneous rupture of the heart, and in every instance the seat of lesion was in the left ventricle. Anomalies and Curiosities of Medicine If the left ventricle is the most hypertrophied, the apex is also to the left, but the impact is very decided and the aortic closure is accentuated. Disturbances of the Heart The consequence of such action on the heart muscle, sooner or later, is a dilation of the left ventricle if the overuse of the tobacco is continued. Disturbances of the Heart From the left ventricle springs the largest arterial trunk in the body, over one-half of an inch in diameter, called the aorta. A Practical Physiology Before the heart muscle actually weakens, the blood pressure has been increased more or less constantly, perhaps permanently, until such time as the left ventricle fails. Disturbances of the Heart A more recent analysis is given by Meyer of cases reported since 1870: Meyer collects 25 cases of rupture of the left ventricle seven of the right ventricle, and four of the right auricle. Anomalies and Curiosities of Medicine This allows more blood to enter the left ventricle, and the left ventricle, acting perfectly on the blood which it receives, causes a good systolic pressure in the aorta and the systemic arteries. Disturbances of the Heart The term "simple hypertrophy" is generally restricted to hypertrophy of the left ventricle without any cardiac excuse—the hypertrophy by hypertension and hard physical labor. Disturbances of the Heart After the aorta leaves the left ventricle it rises towards the neck, but soon turns downwards, making a curve known as the arch of the aorta. A Practical Physiology The symptoms are increased tension, which means, sooner or later, hypertrophy of the left ventricle and an accentuated closure of the aortic valve. Disturbances of the Heart As previously stated, with the absence of good coronary circulation and the consequent impaired nutrition, the left ventricle may also dilate and the mitral valve may become insufficient. Disturbances of the Heart Such regurgitation may occur without valvular disease if for any reason the left ventricle becomes dilated sufficiently to cause the valve to be insufficient. Disturbances of the Heart On the other hand, with a failing left ventricle and a long previous use of tobacco, it is no time to prohibit its use absolutely. Disturbances of the Heart The line of fat which extends from the upper and left side of the heart downwards and across towards the right side, indicates the division between the right and left ventricles. A Practical Physiology A patient who has mitral stenosis and also a small left ventricle will be found to be poorly developed, badly nourished, and to have poor peripheral circulation. Disturbances of the Heart The left ventricle may be small with mitral stenosis, and therefore her general systemic circulation poor. Disturbances of the Heart The left ventricle may, however, become weakened, either by some sudden strain or by a chronic myocarditis, and relative insufficiency of the mitral valve may occur. Disturbances of the Heart The left ventricle from tobacco alone, without any other assignable cause, may become dilated and the mitral valve become insufficient. Disturbances of the Heart Observe that the walls of the left ventricle are much thicker than those of the right. A Practical Physiology Sometimes simple hypertrophy of the left ventricle occurs from various kinds of conditions that increase the peripheral circulation. Disturbances of the Heart If the left ventricle becomes sufficiently weakened or dilated, the same damming back of the blood through the lungs and right heart occurs, and more or less serious signs of broken compensation develop. Disturbances of the Heart If the left ventricle becomes still weaker and shows signs of serious weakness, or if there is actual dilatation, the question of whether or not digitalis should be used is a subject for careful decision. Disturbances of the Heart It has been found that these stimulant baths do not act well in mitral stenosis, if the left ventricle is small. Disturbances of the Heart Of course, like any valvular lesion, it may be associated with other lesions, and sooner or later in many instances, when the left ventricle becomes dilated or weakened, mitral insufficiency also occurs. Disturbances of the Heart Sooner or later, however, the left ventricle will become weakened, especially when there is arteriosclerosis or other hypertension, and chronic endocarditis and fatty degeneration result. Disturbances of the Heart The left ventricle being sufficient, there is no damming back through the left auricle to the lungs. Disturbances of the Heart This lesion, from the frequent overdistention of the left ventricle, is one which often causes pain. Disturbances of the Heart The left ventricle should not be forced to act too sturdily against this aortic resistance. Disturbances of the Heart With such narrowing the left ventricle more or less rapidly hypertrophies to overcome its increased work. Disturbances of the Heart The left ventricle in this condition does not become hypertrophied. Disturbances of the Heart If the heart does act rapidly and the left ventricle contracts on an insufficient amount of blood, the peripheral pulse is necessarily small and the arterial tension is diminished. Disturbances of the Heart Unless the left ventricle can do its work well enough to maintain an adequate pressure of blood in the aorta, the coronary circulation is insufficient, and chronic myocarditis is the result. Disturbances of the Heart Such a heart may, of course, receive a sudden strain, or the left ventricle may dilate, and yet serious myocarditis or fatty degeneration may not have occurred. Disturbances of the Heart While the left ventricle enlarges enormously to overcome the extra distention due to the blood entering the ventricle from both directions, the muscle sooner or later becomes degenerated from poor coronary circulation. Disturbances of the Heart In other words, if the peripheral resistance gradually increases, the left ventricle hypertrophies, and remains for a long time sufficient. Disturbances of the Heart The blood flowing from the pulmonary veins into the left auricle finds this cavity already partly filled with blood regurgitated from the left ventricle. Disturbances of the Heart If a heart is slowed too much, the regurgitation into the left ventricle is increased. Disturbances of the Heart The left ventricle with its enormous strain is perhaps the first part to dilate, thus enlarging the opening of the defective mitral valve. Disturbances of the Heart The left auricle finds it difficult to empty all of its blood into the left ventricle during the ordinary diastole of the heart. Disturbances of the Heart The cavity of the heart that is most affected by this lesion is the left ventricle, which receives blood both from the left auricle, and regurgitantly from the aorta. Disturbances of the Heart Such a heart must never beat slowly, as the longer the diastole prevails the more blood will regurgitate into the left ventricle, and death may occur from sudden anemia of the base of the brain. Disturbances of the Heart The distinctive diagnostic physical sign of this lesion is the diastolic and perhaps presystolic murmur heard over the left ventricle, accentuated at the apex and transmitted some distance to the left of the heart. Disturbances of the Heart If the work is too heavy, and the systolic blood pressure is rapidly increased, it may become so great as to prevent the left ventricle from completely evacuating its content. Disturbances of the Heart |
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