| 单词 | ventricular |
| 例句 | When he developed ventricular fibrillation, a heart rhythm abnormality that can be fatal within minutes, the problem was quickly fixed. Class Matters 2005-09-02T00:00:00Z Reggie appeared to have a slightly bigger ventricular system, for instance. A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age 2014-09-23T00:00:00Z The machines are called left ventricular assist devices and help a weak heart pump blood. The Most Promising New Heart Devices 2010-03-24T21:20:00Z Gottfried died from recurrent ventricular tachycardia due to myotonic dystrophy type II, a disorder that affects the heart, his publicist and longtime friend Glenn Schwartz said in a statement. Gilbert Gottfried, standup comic and actor, dies at 67 2022-04-12T04:00:00Z He collapses while on top of her—a result of ventricular fibrillation, we later learn. House Watch: Score One for the Team 2011-11-08T13:43:47Z Ever since high school, I have suffered from supra ventricular tachycardia, in which a faulty electrical connection in the heart randomly degenerates into either abnormally fast or irregular heartbeats. If this is my final tweet 2012-06-29T23:30:00Z During that process, they found a significant hole between my right ventricle and my aorta called a right ventricular fistula, which they sealed with a metal disc. For a 30-Year-Old Virgin, It’s Now or Never 2018-03-30T04:00:00Z The doctors commanded him to stop working, and he was put on a left ventricular assist device to keep his heart beating. Valerie June: The First Time I Lost a Parent 2017-03-07T05:00:00Z It’s called ventricular fold phonation, and it means you vibrate the cartilage in your throat alongside your vocal cords. Alex Brightman Lays ‘Beetlejuice’ to Rest 2023-01-09T05:00:00Z An autopsy concluded that “ventricular fibrillation” was the cause of death, meaning that Warhol’s heart had quivered and stopped. Warhol’s Death: Not So Simple, After All 2017-02-21T05:00:00Z Somers’ death certificate said she battled hydrocephalus for more than a year, and received an “intracerebral ventricular shunt” in July 2022 to drain excess fluid. Suzanne Somers' cause of death revealed 2023-10-27T04:00:00Z NPH is a condition that occurs particularly in older people, whereby fluid builds up in the cerebral ventricular system and results in neurological symptoms. Smarter CT scans may approach the level of MRI 2023-10-17T04:00:00Z Then, they asked the device to classify six types of heart beats: normal, atrial premature beat, premature ventricular contraction, paced beat, left bundle branch block beat and right bundle branch block beat. AI just got 100-fold more energy efficient 2023-10-12T04:00:00Z Some members of the care team pointed to an option for longer-lasting mechanical heart support, known as a left ventricular assist device or LVAD, but Lin didn’t love the idea. To save a young mom, Seattle transplant doctors had to become pioneers 2023-08-27T04:00:00Z Caffeine overdoses can cause primary cardiac arrests in the form of ventricular fibrillation, which is different from sudden cardiac arrest. In wake of Bronny James' cardiac arrest, young athletes express concerns over health risks 2023-07-26T04:00:00Z Closing of the valves to these arteries caused by blood being drawn back toward the heart during ventricular relaxation produces a monosyllabic “dub” sound. Concepts of Biology 2013-04-25T00:00:00Z She described the cause of death as an “acute myocardial infarction and ventricular fibrillation.” Mexican singer-actor Julián Figueroa's death sparks outpouring of grief 2023-04-10T04:00:00Z Premature atrial contractions are a type of irregular heartbeat that emanates from the top chambers of the heart, called the atria, while premature ventricular contractions come from the bottom chambers, called the ventricles. Coffee lovers gain 1,000 steps a day, but get less sleep, study shows 2023-03-22T04:00:00Z They also found slight evidence of another kind of irregular heartbeat that comes from the lower heart chambers, called premature ventricular contractions. What to know about new research on coffee and heart risks 2023-03-22T04:00:00Z If the impact is strong enough and occurs at a specific moment between heartbeats, it can send the heart into an erratic, disorganized rhythm called ventricular fibrillation. Opinion | What we can learn from Damar Hamlin’s tragic cardiac arrest 2023-01-03T05:00:00Z A cardiac pathologist noted in a report that Sandoe had an enlarged heart with acute left ventricular failure and left ventricular hypertrophy. Bodybuilders dying as coaches and judges encourage extreme measures He also had coronary artery disease that led to the cardiac arrest, including documented ventricular arrhythmias. Q&A: Here's what jury must consider in USC’s Matt Gee llandmark CTE lawsuit against the NCAA 2022-11-22T05:00:00Z But coffee consumption can lead to an increase in another type of heart palpitation, known as premature ventricular contractions. Coffee lovers gain 1,000 steps a day, but get less sleep, study shows 2023-03-22T04:00:00Z The threshold for ventricular fibrillation is between 100 and 300 mA. College Physics for AP Courses 2015-08-12T00:00:00Z Finally, the Purkinje fibers conduct the impulse from the apex of the heart up the ventricular myocardium, and then the ventricles contract. Biology for AP Courses 2022-06-09T00:00:00Z ANDRIJEVIC: We have observed, as reported in the paper, restoration of electrical ventricular activity of the heart. How Scientists Revived Dead Pigs’ Organs, and What the Feat Means for Transplants 2022-08-10T04:00:00Z The mechanical pumps, called left ventricular assist devices or LVADs, have also come a long way and can add years more of life. Perspective | Cardiomyopathy is scary. But today, the heart disease is less deadly. 2022-08-01T04:00:00Z The researchers found that on days when people drank more than one cup of coffee, they experienced about 50 percent more premature ventricular contractions. Coffee lovers gain 1,000 steps a day, but get less sleep, study shows 2023-03-22T04:00:00Z TV dramatizations of electric shock used to bring a heart attack victim out of ventricular fibrillation also show large paddles. College Physics for AP Courses 2015-08-12T00:00:00Z Purkinje fibers conduct impulse from the apex up the ventricular myocardium, causing the ventricles to contract. Biology for AP Courses 2022-06-09T00:00:00Z The ventricular system opens up to the subarachnoid space from the fourth ventricle. Anatomy and Physiology 2013-06-19T00:00:00Z When the condition occurs, doctors typically see that a patient's left ventricular apical, which is located within the heart, balloons. Dying from a broken heart is a real thing 2022-06-09T04:00:00Z He added, “The second issue is that he likely has some underlying cardiac condition that increases his risk for ventricular arrhythmias and thus sudden cardiac death.” After Stroke, Doctors Look at Fetterman’s Campaign Trail Prospects 2022-05-23T04:00:00Z For these people, currents as low as 0.1 mA may cause ventricular fibrillation. College Physics for AP Courses 2015-08-12T00:00:00Z Purkinje fibers conduct the impulse from the apex up the ventricular myocardium, causing the ventricles to contract. Biology for AP Courses 2022-06-09T00:00:00Z Figure 13.18 Cerebrospinal Fluid Circulation The choroid plexus in the four ventricles produce CSF, which is circulated through the ventricular system and then enters the subarachnoid space through the median and lateral apertures. Anatomy and Physiology 2013-06-19T00:00:00Z His friend and publicist Glenn Schwartz said in a statement he died from recurrent ventricular tachycardia due to myotonic dystrophy type II, a disorder that affects the heart. Gilbert Gottfried: Stars pay tribute to late comedian and actor 2022-04-13T04:00:00Z The transplant recipient, 57-year-old David Bennett, had advanced heart failure and a type of arrhythmia called ventricular fibrillation. Here’s how scientists pulled off the first pig-to-human heart transplant 2022-01-11T05:00:00Z The person’s heart attack might have arisen from the onset of fast, irregular beating of the heart—cardiac or ventricular fibrillation. College Physics for AP Courses 2015-08-12T00:00:00Z Purkinje fibers conduct impulse from the apex up the ventricular myocardium, causing the ventricles to contract. Biology for AP Courses 2022-06-09T00:00:00Z They connect each of the flaps to a papillary muscle that extends from the inferior ventricular surface. Anatomy and Physiology 2013-06-19T00:00:00Z He was diagnosed with a rare genetic condition called left ventricular noncompaction, caused by the failure of myocardial development from birth. Ex-Met lefty Feliciano, led MLB 3 times in games, dies at 45 2021-11-08T05:00:00Z Fuse, who joined Kirin group in 1982, succumbed to ventricular fibrillation at a Tokyo hospital on Thursday, a company spokesperson said. Kirin Brewery chief dies; group CEO to run unit in interim 2021-09-03T04:00:00Z Its electrical patterns can be disrupted, so that it beats irregularly and ineffectively in a condition called “ventricular fibrillation.” College Physics for AP Courses 2015-08-12T00:00:00Z The bundle of His conduct impulse from the apex up the ventricular myocardium, causing the ventricles to contract. Biology for AP Courses 2022-06-09T00:00:00Z The large QRS complex represents the depolarization of the ventricles, which requires a much stronger electrical signal because of the larger size of the ventricular cardiac muscle. Anatomy and Physiology 2013-06-19T00:00:00Z His wife, Linda, said that he died after an episode of ventricular tachycardia, in which the heart beats faster than normal. Spencer Silver, an inventor of Post-it Notes, is dead at 80 2021-05-13T04:00:00Z In addition, the study argued that "each of these drug regimens was associated with decreased in-hospital survival and an increased frequency of ventricular arrhythmias when used for treatment of COVID-19." Major medical journal's retraction of hydroxychloroquine study is poised to rile the MAGA crowd 2020-06-04T04:00:00Z What is the smallest voltage on the case of the radio that could cause ventricular fibrillation? College Physics for AP Courses 2015-08-12T00:00:00Z In the Brazil study, two of the 37 patients who were getting high doses of chloroquine developed ventricular tachycardia, a dangerous heart arrhythmia that led to their deaths. Malaria drugs fail to help coronavirus patients in controlled studies 2020-04-17T04:00:00Z Since ventricular systole began with an EDV of approximately 130 mL of blood, this means that there is still 50–60 mL of blood remaining in the ventricle following contraction. Anatomy and Physiology 2013-06-19T00:00:00Z 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 They soon homed in on a small part of the dorsal ventricular ridge, a region located toward the front of the lizard’s brain with an unknown function—until now. The Australian bearded dragon may hold secrets to human sleep 2020-02-12T05:00:00Z Fibromas “are often associated with arrhythmias and ventricular tachycardia,” per the hospital. Baby born with rare heart tumor to seek surgery in US: 'Every day is an unknown,' mom says 2019-10-22T04:00:00Z From there, it propels itself using a motorized drive system along the pulsating ventricular wall to a damaged valve near the top of the ventricle, guided by vision and touch sensors. Your robot surgeon will see you now 2019-09-24T04:00:00Z In the second phase of ventricular diastole, called late ventricular diastole, as the ventricular muscle relaxes, pressure on the blood within the ventricles drops even further. Anatomy and Physiology 2013-06-19T00:00:00Z Langston, 59, suffered a ventricular fibrillation, a life-threatening heart rhythm that can be triggered by a heart attack. Angels All-Star Tommy La Stella hopes to return from injured list this weekend 2019-09-24T04:00:00Z When Greenough recognized that the patient was in ventricular fibrillation, or Vfib, he urged the other two to shock the patient. Grand Island firefighter saves a tourist’s life on vacation 2019-08-03T04:00:00Z He was driving after a gym workout when his heart went into ventricular fibrillation. Another North Carolina legislator joins race for US Senate 2019-06-18T04:00:00Z Despite the prolonged investigation, the cause of the ventricular fibrillation remained undiagnosed. Unraveling the mystery of "deadly dreams" syndrome 2019-02-10T05:00:00Z The QT interval represents the time from the start of depolarization to repolarization of the ventricles, and includes the period of ventricular systole. Anatomy and Physiology 2013-06-19T00:00:00Z Like death metal, it involves activating parts of the larynx that usually lie quiet—in this case, the ventricular folds that flank the vocal cords. Roomful of Teeth Is Revolutionizing Choral Music 2019-02-04T05:00:00Z Mr. Bogle was treated for right ventricular dysplasia, a congenital heart defect, for more than 30 years, and had at least six heart attacks, the first in 1960. John C. Bogle, Founder of Financial Giant Vanguard, Is Dead at 89 2019-01-16T05:00:00Z Her mom’s death certificate attributes the primary cause of her passing to ventricular fibrillation, which the American Heart Assn. calls “the most serious cardiac rhythm disturbance,” preventing the heart from pumping blood. Sorry your mom is dead. If only she'd been hit by a bus, we'd pay your claim 2019-01-11T05:00:00Z The city was built as a major transportation hub in the late 1890s, with two major railways running through the heart of downtown like ventricular valves, carrying wheat, lumber and coal to the west coast. Many of my childhood friends are dead. Is masculinity to blame? 2018-06-20T04:00:00Z Any sympathetic stimulation to the venous system will increase venous return to the heart, which contributes to ventricular filling, and EDV and preload. Anatomy and Physiology 2013-06-19T00:00:00Z In 2015, a St. Luke’s surgeon implanted a left ventricular assist device in Reed to keep his weakened heart going long enough for a transplant. Patients wait in limbo as St. Luke’s heart transplant program reviews its problems 2018-06-18T04:00:00Z Generation of functional ventricular heart muscle from mouse ventricular progenitor cells. Advanced maturation of human cardiac tissue grown from pluripotent stem cells 2018-04-03T04:00:00Z Given the constant right ventricular mixing of all blood returning to the heart, invariably, all "unclaimed" vesicles will have the chance to reach the liver, but in a much-"diluted" fashion. The Mysterious Interior World of Exercise 2018-01-24T05:00:00Z The following year, he was taken seriously ill while on a flight to Washington DC and was diagnosed with idiopathic ventricular fibrillation - requiring him to be fitted with a heart defibrillator. The MPs and ex-MPs who died in 2017 2017-12-29T05:00:00Z Parasympathetic stimulation in the atria decreases the atrial kick and reduces EDV, which decreases ventricular stretch and preload, thereby further limiting the force of ventricular contraction. Anatomy and Physiology 2013-06-19T00:00:00Z He had struggled for a decade with ventricular tachycardia and had received four catheter ablations — but still had rapid heartbeats. A ‘Game Changer’ for Patients With Irregular Heart Rhythm 2017-12-13T05:00:00Z The survival of patients on ventricular assist devices has been gradually improving since their inception more than 50 years ago. What's it like to live with a mechanical heart? 2017-12-08T05:00:00Z As people await transplantation, their hearts are put on so-called ventricular assist devices, or VADs. This robot can help keep pig hearts beating by gently squeezing them 2017-11-22T05:00:00Z She said the medical cause of death was left ventricular hypertrophy and obesity. 'Human error' blamed for ambulance delay 2017-11-06T05:00:00Z When ventricular pressure rises above the pressure in the two major arteries, blood pushes open the two semilunar valves and moves into the pulmonary trunk and aorta in the ventricular ejection phase. Anatomy and Physiology 2013-06-19T00:00:00Z Yet the patients still were having thousands of episodes of ventricular tachycardia, during which a heart may beat 200 times a minute as blood pressure plummets. A ‘Game Changer’ for Patients With Irregular Heart Rhythm 2017-12-13T05:00:00Z But a heart captured by a rapidly moving outside source of electricity can lead to potentially lethal ventricular fibrillation. Special Report: More power and a quiet exit for Taser’s best-selling product 2017-09-21T04:00:00Z The investigators, including a cardiologist on Taser’s scientific advisory board, identified the signature peaks and valleys of ventricular fibrillation on a cardiac activity readout taken just before the young man died. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z After being stunned, Schrock went into ventricular fibrillation, a condition marked by a wildly erratic heartbeat. Special Report: A 911 plea for help, a Taser shot and the toll of stun guns 2017-08-23T04:00:00Z Following ventricular repolarization, the ventricles begin to relax, and pressure within the ventricles drops. Anatomy and Physiology 2013-06-19T00:00:00Z HCM is a myocardial disease characterized by left ventricular hypertrophy, myofibrillar disarray and myocardial stiffness; it has an estimated prevalence of 1:500 in adults5 and manifests clinically with heart failure. Correction of a pathogenic gene mutation in human embryos : Nature : Nature Research 2017-08-01T04:00:00Z But a heart captured by a rapidly moving outside source of electricity can lead to potentially lethal ventricular fibrillation. Special Report: More power and a quiet exit for Taser’s best-selling product 2017-09-21T04:00:00Z According to Smith, none went into ventricular fibrillation, a chaotic heartbeat that can lead to death within minutes. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z After being stunned, Schrock went into ventricular fibrillation, a condition marked by a wildly erratic heartbeat. Special Report: A 911 plea for help, a Taser shot and the toll of stun guns 2017-08-23T04:00:00Z This prevents the flaps of the valves from being forced into the atria and regurgitation of the blood back into the atria during ventricular contraction. Anatomy and Physiology 2013-06-19T00:00:00Z The heart pump, a left ventricular assist device, or LVAD, had been developed in the 1980s. 20 years later, heart transplant beats on 2017-07-24T04:00:00Z The ventricular assist device helps the heart’s main pumping chamber circulate blood. FDA: Controller for heart pump recalled over deaths 2017-05-24T04:00:00Z “Stored event data revealed two high ventricular rate episodes corresponding to the exact time of the Taser application,” the doctors reported in the Journal of Cardiovascular Electrophysiology. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z These ventricular assist devices, or VADs, prolong life, but running blood through the machinery can leave patients at risk of blood clots, strokes and bleeding. Robotic sleeve helps diseased heart keep pumping 2017-02-17T05:00:00Z The pulse strength indicates the strength of ventricular contraction and cardiac output. Anatomy and Physiology 2013-06-19T00:00:00Z He was believed to be the first to perform surgery using a partial artificial heart, known as a ventricular assist device. Dr. Denton Cooley, Whose Pioneering Heart Surgery Set Off a 40-Year Medical Feud, Dies at 96 2016-11-18T05:00:00Z Based on this man’s case, his team is hoping to now inject not just the tumor site but also the ventricular space in the brain, since that may help control spread of the cancer. Experimental Brain Cancer Treatment Is a Success 2016-12-28T05:00:00Z In it, he said, researchers were able to induce ventricular fibrillation in pigs with the X26, but only by turning up the charge to 20 times its standard output. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z Doctors implanted a ventricular assist device to regulate blood flow and keep Carew alive. Hall of Famer Carew to receive heart transplant 2016-12-15T05:00:00Z At the base of the pulmonary trunk is the pulmonary semilunar valve, which prevents backflow of blood into the right ventricle during ventricular diastole. Anatomy and Physiology 2013-06-19T00:00:00Z Doctors implanted into his chest a left ventricular assist device that took over the heart’s pumping duties. Hall of Famer Rod Carew to have heart, kidney transplant 2016-12-15T05:00:00Z Mr. Guerrero’s doctors surgically implanted a mechanical pump known as a left ventricular assist device, or LVAD, which helps a weakened heart pump blood. A Mental Test Before Surgery 2016-11-28T05:00:00Z “Stored event data revealed two high ventricular rate episodes corresponding to the exact time of the Taser application,” the doctors reported in the Journal of Cardiovascular Electrophysiology. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z He was fitted with what is known as a left ventricular assist device. Union leader waits for new heart to save his life - BBC News 2016-11-17T05:00:00Z Atrial systole lasts approximately 100 ms and ends prior to ventricular systole, as the atrial muscle returns to diastole. Anatomy and Physiology 2013-06-19T00:00:00Z That device was functioning fine, but he still went into sudden cardiac arrest caused by ventricular fibrillation, when the heart beats fast and erratically. App turns volunteer Seattleites into lifesaving CPR responders 2016-09-23T04:00:00Z Coger died from an enlarged heart — "cardiomegaly with left ventricular hypertrophy" — and the manner of death was natural, Oklahoma State Medical Examiner's Office spokeswoman Amy Elliott said in an email Friday. OSU officials: Coger died after 40-minute outdoor workout 2016-07-22T04:00:00Z In it, he said, researchers were able to induce ventricular fibrillation in pigs with the X26, but only by turning up the charge to 20 times its standard output. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z Survival rates in King County reached 62 percent in 2013 for bystander-witnessed cardiac arrests caused by ventricular fibrillation, or uncontrolled muscle contractions in the heart. CPR app turns Seattle bystanders into first responders 2016-05-31T04:00:00Z Recognizable points on the ECG include the P wave that corresponds to atrial depolarization, the QRS complex that corresponds to ventricular depolarization, and the T wave that corresponds to ventricular repolarization. Anatomy and Physiology 2013-06-19T00:00:00Z His single ventricular transposition of the aorta meant that he would endure seven surgeries in his life. Mother’s Day without her son: ‘I knew from the beginning he would probably die before I did.’ 2016-05-07T04:00:00Z Some of the telltale signs of these sleep stages, seen in the brain's hippocampus in mammals, were found in a more primitive brain region, the dorsal ventricular ridge, in the lizards. Slumber party: reptiles, like us, have REM sleep and may dream 2016-04-28T04:00:00Z The investigators, including a cardiologist on Taser’s scientific advisory board, identified the signature peaks and valleys of ventricular fibrillation on a cardiac activity readout taken just before the young man died. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z If further studies are successful, stem cell therapy may one day offer an alternative to current treatments for end-stage heart failure, such as heart transplantation and left ventricular assist device therapy, the researchers said. Stem Cell Therapy Shows Promise Against Heart Failure 2016-04-04T04:00:00Z As pressure in the ventricles rises above two major arteries, blood pushes open the two semilunar valves and moves into the pulmonary trunk and aorta in the ventricular ejection phase. Anatomy and Physiology 2013-06-19T00:00:00Z 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 Thousands of other Americans have years added to their lives with the aid of a smaller artificial apparatus, a partial heart known as a ventricular assist device, or VAD. Artificial Hearts Ticking Along Decades After Jarvik-7 Debate 2016-03-20T04:00:00Z According to Smith, none went into ventricular fibrillation, a chaotic heartbeat that can lead to death within minutes. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z Hypertrophic cardiomyopathy, an abnormally thickened heart, and arrhythmogenic right ventricular cardiomyopathy, a disease of the heart muscle, were the most common cause of death. Slow Eating May Help Overweight Children 2016-02-22T05:00:00Z Deeper ventricular muscles also form a figure 8 around the two ventricles and proceed toward the apex. Anatomy and Physiology 2013-06-19T00:00:00Z They noted that left ventricular function got progressively worse as waist sizes got bigger, with heart decline eventually leveling off at 45 inches of waistline. Waistline May Predict Heart Disease Better Than Weight 2016-04-02T04:00:00Z In October, doctors at a hospital in La Jolla, Calif., implanted a left ventricular assist device, known as an L.V.A.D., to help Carew’s weakened heart pump more efficiently. Now a Survivor, Rod Carew Weeps Without Shame 2016-01-30T05:00:00Z It showed that shocks to the chest triggered extra heartbeats, a phenomenon known as capture, as well as the more dangerous ventricular fibrillation, but only when more than a standard jolt was applied. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z The apparent cause was ventricular fibrillation, said a son, Brandon Beavers. Robert M. Beavers Jr., executive with McDonald’s, dies at 71 2015-08-25T04:00:00Z More superficial layers of ventricular muscle wrap around both ventricles. Anatomy and Physiology 2013-06-19T00:00:00Z Thoratec’s heat failure devices, which include HeartMate ventricular assist systems, would allow St. Jude representatives to leverage their relationships with heart failure physicians and cardiac surgeons. St. Jude Medical to Buy Thoratec for $3.4 Billion 2015-07-22T04:00:00Z The scientists, writing in The Journal of the American College of Cardiology, studied left ventricular dysfunction — damage to the part of the heart that pumps blood to the entire body except the lungs. Keeping Blood Pressure Low in Those Under 50 2015-07-06T04:00:00Z The company also said research had not well established that Tasers could trigger ventricular fibrillation or cardiac arrest. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z However, right ventricular function during exercise was different among the athletes with arrhythmias compared to the other two groups. Test Endurance Athletes for Heart Woes While They Exercise: Study 2015-06-03T04:00:00Z 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 Nechodom, who spent 47 days in the hospital following his heart attack, described the left ventricular assist device as a portable life-support system. More than 2,300 wait for organ transplants in Wisconsin 2015-05-25T04:00:00Z His left ventricular assist device – a mechanical heart pump – will keep his blood flowing strong as he sleeps. Assist for Congestive Heart Failure 2015-04-17T04:00:00Z The company also said research had not well established that Tasers could trigger ventricular fibrillation or cardiac arrest. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z He and his colleagues tested the performance of the hearts of 17 endurance athletes with right ventricular arrhythmias, 10 athletes without heart problems, and seven nonathletes. Test Endurance Athletes for Heart Woes While They Exercise: Study 2015-06-03T04:00:00Z Approximately 70–80 percent of ventricular filling occurs by this method. Anatomy and Physiology 2013-06-19T00:00:00Z These include the implantation of a left ventricular assist device, a battery-operated mechanical pump. How Heart Failure Patients Can Succeed 2015-03-13T04:00:00Z Its focus is on prosthetic heart valves and ventricular assist devices. UL-Lafayette adds artificial heart lab 2015-02-03T05:00:00Z It showed that shocks to the chest triggered extra heartbeats, a phenomenon known as capture, as well as the more dangerous ventricular fibrillation, but only when more than a standard jolt was applied. Special Report: The garage science behind the stun gun that changed policing 2017-09-20T04:00:00Z He said it could be similar to another condition called commotio cordis, which results from ventricular fibrillation -- a more serious erratic rhythm in the heart's lower chambers -- following a hard hit to the chest. Hard Hit to Chest Triggered Irregular Heartbeat in Teen Football Player 2014-12-08T05:00:00Z One of the primary factors to consider is filling time, or the duration of ventricular diastole during which filling occurs. Anatomy and Physiology 2013-06-19T00:00:00Z In ventricular fibrillation, the most common lethal arrhythmia, the lower chambers of the heart, the ventricles, pulsate rapidly instead of beating steadily. Defibrillator Insertion: Implant for Life 2014-11-26T05:00:00Z Riggs explained to me that all the patients in those two groundbreaking trials experienced cardiac arrests due to either ventricular fibrillation or ventricular tachycardia, two electrical disturbances that are eminently treatable. Are Some Life Saving Treatments Overkill? 2014-09-10T04:00:00Z Unheralded collapse with documented ventricular fibrillation may be the mode of presentation of heat stroke. Death By Running: It's The Heat And Not The Heart 2014-07-28T04:00:00Z I've got an enlarged heart and what they call a left-side ventricular block, where the electrical impulses don't come out on both sides of my heart. From the Archive: Dialogue with Payne Stewart 2014-06-09T04:00:00Z At rest, there is little stretch of the ventricular muscle, and the sarcomeres remain short. Anatomy and Physiology 2013-06-19T00:00:00Z As with hippocampal lesions, in adolescence the animals begin to show many hallmarks of schizophrenia, such as cortical thinning, ventricular enlargement, the loss of a subset of interneurons in the frontal cortex, and cognitive changes. Drug development: The modelling challenge 2014-04-02T17:21:02.740Z The HeartMate II is a so-called LVAD, or left ventricular assist device, that is used to keep alive heart patients who are either ineligible for or awaiting a heart transplant. Clot risk higher than previously seen with Thoratec heart pump: study 2013-11-27T22:03:25Z At one year there was no difference in the primary end point, left ventricular end-systolic volume index, between the two groups. Replacement Versus Repair for Mitral Valve Regurgitation 2013-11-18T16:45:00Z The overall assessment showed that “absolute improvement” of left ventricular function was greater in those individuals treated with bone marrow cells as compared to the control group, said Smith. NeoStem Unfazed By Hiccup Over Its AMR-001 Cardiovascular Stem Cell Treatment 2013-09-27T14:07:00Z With increased ventricular filling, the ventricular muscle is increasingly stretched and the sarcomere length increases. Anatomy and Physiology 2013-06-19T00:00:00Z “Today, in addition to measurement of left ventricular ejection fraction, the simple 12-lead surface ECG remains the only evidence-based means of identifying patients who may obtain the substantial benefits of CRT.” Study Fails To Support Broader Patient Population For Cardiac-Resynchronization Therapy 2013-09-03T06:00:00Z The S-ICD “is pared down to 1 essential meaning, purpose, and value: ventricular arrhythmia defibrillation.” New Subcutaneous ICD Said To Pose 'Existential Crisis' For Older ICDs 2013-08-26T20:02:00Z And they found that the exercised animals’ hearts resisted ventricular fibrillation better than a group of sedentary control rats did. Well: Can You Get Too Much Exercise? 2013-07-24T04:08:39Z The estimated incidence of in-hospital cardiac arrest is 3 to 6/1000 admissions and similarly, approximately 25% of these present with pulseless ventricular arrhythmias. Defibrillators, Emergency Exit Rows And The Tragedy of Ignorance 2013-07-12T19:26:00Z The relationship between ventricular stretch and contraction has been stated in the well-known Frank-Starling mechanism or simply Starling’s Law of the Heart. Anatomy and Physiology 2013-06-19T00:00:00Z These benefits have not been reproduced so far in patients with narrow QRS intervals, though many such patients have ventricular dyssynchrony. Study Fails To Support Broader Patient Population For Cardiac-Resynchronization Therapy 2013-09-03T06:00:00Z Sallan and his colleagues found that children who took ACE inhibitors after anthracycline therapy saw an initial strengthening of their left ventricular walls, but the effect did not last. Drug safety: Double jeopardy 2013-06-26T17:20:58.983Z But they focused on ventricular fibrillation, which is far more lethal than atrial fibrillation. Well: Can You Get Too Much Exercise? 2013-07-24T04:08:39Z The authors wrote that “ADVANCE III demonstrated that the use of a long detection setting… significantly reduced the rate of ventricular therapies delivered and inappropriate shocks compared with the standard detection setting.” Longer Detection Time Helps Prevent Unnecessary ICD Shocks 2013-05-07T20:53:28Z Which term is typically used to refer ventricular contraction while no blood is being ejected? Anatomy and Physiology 2013-06-19T00:00:00Z Valsartan, captopril, or both in myocardial infarction complicated by heart failure, left ventricular dysfunction, or both. Japanese Research Scandal Expands To A Second Trial And A Novartis Employee 2013-05-02T20:44:31Z The body of evidence is thus approaching critical mass to render future trials comparing right ventricular pacing and CRT unethical, perhaps even in patients with preserved LVEF.” BLOCK HF: CRT Superior To Conventional Pacing In Heart Failure Patients With AV Block 2013-04-24T21:00:34Z Patients with chronic kidney disease and those with a particular heart weakness known as low left ventricular ejection fraction, were excluded from most of the studies because they are more prone to complications. Same-day discharge after angioplasty seems safe 2013-04-23T20:03:29Z The high-school senior suffered sudden cardiac arrest at school Feb. 12 and later diagnosed with a rare heart condition, arrhythmogenic right ventricular dysplasia/cardiomyopathy, found in 1 of every 5,000 people in the U.S. Vancouver teen survives sudden cardiac arrest; many don’t 2013-04-08T03:26:53Z While most ventricular filling occurs while the atria are relaxed, they do demonstrate a contractile phase and actively pump blood into the ventricles just prior to ventricular contraction. Anatomy and Physiology 2013-06-19T00:00:00Z Echocardiography indicated improvement in cardiac function, ventricular volumes, and global wall motion scores. [Research Articles] Safety and Efficacy of an Injectable Extracellular Matrix Hydrogel for Treating Myocardial Infarction 2013-02-20T19:25:10.613Z Not only does AF predispose to stroke, heart failure, and death, but the arrhythmia per se may increase the risk of death from ventricular tachyarrhythmias.” Atrial Fibrillation Linked To Increased Risk For Sudden Cardiac Death 2013-01-14T21:00:42Z Funding: Prospective trial of a pediatric ventricular assist device. American Heart Association Lists Top 10 Research Advances 2012-12-17T16:09:46Z HeartWare's left ventricular assist device, or LVAD, is designed to be implanted in the chest near the heart and used inside or outside the hospital. FDA approves HeartWare pump for heart failure patients 2012-11-20T20:54:05Z When the myocardium of the ventricle contracts, pressure within the ventricular chamber rises. Anatomy and Physiology 2013-06-19T00:00:00Z 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 At Hackensack, his responsibilities included implanting left ventricular assist devices, used to aid patients whose hearts are failing. Peter Praeger, a Surgeon With a Health Food Company, Dies at 65 2012-09-29T19:17:53Z Let’s start with the the big words: ventricular fibrillation. STOP a heart. SAVE a life. 2012-08-28T14:54:22Z One high voltage failure during a spontaneous ventricular arrhythmia resulted in an ineffective shock and subsequent patient death. Guest Post: New Questions Raised About Latest Generation St. Jude ICD Leads 2012-08-21T15:39:22Z If untreated for as little as a few minutes, ventricular fibrillation may lead to brain death. Anatomy and Physiology 2013-06-19T00:00:00Z Paul Corby was recommended for the procedure because he was born with left ventricular noncompaction, a congenital disorder that left part of his heart less able to pump blood through his body. Mom seeks heart transplant for autistic son 2012-08-17T09:31:04Z Among the 24 smallest children, more than half whose hearts were helped by the pump, known as a ventricular assist device, were alive at the 174-day mark. Children waiting for new hearts live longer on pump 2012-08-08T21:16:35Z Sudden death can also occur from ventricular fibrillation—a severally abnormal heart rhythm induced when the cardiac muscles quiver instead of contracting normally. The Childhood Drug Abuse Epidemic No One is Talking About 2012-08-03T02:58:25Z Sudden cardiac arrest, often associated with ventricular fibrillation, strikes more than 300,000 people a year in the U.S. Double-blind study tests heart-rhythm drugs 2012-07-28T23:54:05Z Figure 19.27 Overview of the Cardiac Cycle The cardiac cycle begins with atrial systole and progresses to ventricular systole, atrial diastole, and ventricular diastole, when the cycle begins again. Anatomy and Physiology 2013-06-19T00:00:00Z An ICD can also raise a slow heart rate, but is programmable to jolt a fast ventricular arrhythmia back to normal — and there’s no ignoring the zap when it does. The New Old Age Blog: A Heart Quandary 2012-06-07T15:28:41Z Living with the pump, called a left ventricular assist device, or LVAD, means keeping the battery charged constantly and avoiding full immersion in the bathtub. Cheney Heart Transplant a Recent Decision 2012-03-26T04:49:23Z The pump, called a left ventricular assist device, is mainly used for short periods to buy time for potential transplant candidates awaiting a donor organ. Aide Says Cheney Had Heart Transplant 2012-03-24T23:27:25Z A 1999 study found a placebo was as effective as Amiodarone for saving the lives of patients in ventricular fibrillation. Double-blind study tests heart-rhythm drugs 2012-07-28T23:54:05Z During the early phase of ventricular diastole, as the ventricular muscle relaxes, pressure on the remaining blood within the ventricle begins to fall. Anatomy and Physiology 2013-06-19T00:00:00Z He was so miserable that doctors thought he would feel better with a "mini artificial heart" - a $100,000 left ventricular assist device to make his heart pump better. Advice urges wider sharing of heart care decisions 2012-03-05T21:03:09Z The product, known as a ventricular assist device, does the work of a normal heart in children with congenital or other cardiovascular defects that prevent their own from circulating enough blood to fuel the body. Berlin Heart Wins U.S. Approval of Cardiac Pump for Children 2011-12-16T20:14:52Z Treatment with phenytoin reduced both QTc and sustained ventricular tachycardia in mice. [Research Articles] Pathogenesis of Lethal Cardiac Arrhythmias in Mecp2 Mutant Mice: Implication for Therapy in Rett Syndrome 2011-12-14T20:25:12.277Z The goal: determine the best way to revive a heart that stops pumping blood, quivering randomly instead — called ventricular fibrillation. Double-blind study tests heart-rhythm drugs 2012-07-28T23:54:05Z The QRS complex represents depolarization of the ventricles and is followed by ventricular contraction. Anatomy and Physiology 2013-06-19T00:00:00Z His cardiac monitor, the first thing I noticed, showed fast and irregular beats with bursts of a messy, wavy rhythm called ventricular tachycardia. Essay: When Care Is Worth It, Even if End Is Death 2011-12-12T17:41:29Z J&J is interested in ventricular assist devices and another fast-growing category, minimally invasive artificial heart valves, CFO Dominic Caruso told investors at a Sept. Thoratec May Entice J&J, Medtronic, Abbott Bids, Oracle Says 2011-12-06T17:06:03Z Oracle Investment said it believes Thoratec, a maker of left ventricular assist devices that help the heart circulate blood in heart failure patients, will be unable to maximize shareholder value as an independent public company. UPDATE 1-Investor urges Thoratec to sell itself 2011-12-05T22:17:59Z The study also showed that their left ventricular dysfunction present on hospital admission quickly went away over the next few days. Vulnerable hearts can be broken or 'scared to death' 2011-11-03T20:01:04Z The T wave represents the repolarization of the ventricles and marks the beginning of ventricular relaxation. Anatomy and Physiology 2013-06-19T00:00:00Z It has been thought by some that it represented actual ventricular contraction and its height and shape had some meaning in heart force. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Abnormalities in cardiac impulse propagation underlie lethal reentrant arrhythmias, including ventricular fibrillation. [Research Articles] Reversible Cardiac Conduction Block and Defibrillation with High-Frequency Electric Field 2011-09-28T20:25:45.923Z The addition of MV, SM, and HRM to existing metrics significantly improved model discrimination, as well as the precision and recall of prediction rules based on left ventricular ejection fraction. [Research Articles] Computationally Generated Cardiac Biomarkers for Risk Stratification After Acute Coronary Syndrome 2011-09-28T20:25:41.960Z We then used the model to predict the effects of these drugs on normal human ventricular cellular and tissue electrical activity in the setting of a common arrhythmia trigger, spontaneous ventricular ectopy. [Research Articles] A Computational Model to Predict the Effects of Class I Anti-Arrhythmic Drugs on Ventricular Rhythms 2011-09-01T04:55:07.840Z As HR increases from 120 to 160 bpm, CO remains stable, since the increase in rate is offset by decreasing ventricular filling time and, consequently, SV. Anatomy and Physiology 2013-06-19T00:00:00Z In the former there are ventricular silences, during which the auricles beat two, three, four, five, even up to nine times, with only one ventricular contraction. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Temporary propagation block throughout the ventricular myocardium could possibly terminate these arrhythmias. [Research Articles] Reversible Cardiac Conduction Block and Defibrillation with High-Frequency Electric Field 2011-09-28T20:25:45.923Z But critics say the powerful jolts, which in rare cases have caused broken bones, could also hijack the heart, causing it to enter a deadly flutter called ventricular fibrillation. Answer on Taser danger depends on who's asking 2011-08-19T19:26:53Z In general, patients younger than 63 performed similarly on memory tests, regardless of left ventricular function. Heart failure in elderly linked to memory problems 2011-08-11T01:54:06Z As ventricular pressure drops, there is a tendency for blood to flow back into the atria from the major arteries, producing the dicrotic notch in the ECG and closing the two semilunar valves. Anatomy and Physiology 2013-06-19T00:00:00Z When the block is partial the rate of the ventricular contraction varies proportionally with the rate of the auricular contractions but only within certain limits. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z At 14 weeks, both control groups showed significantly decreased myocardial S100A1 protein expression along with progressive deterioration of cardiac performance and left ventricular remodeling. [Research Articles] Cardiac AAV9-S100A1 Gene Therapy Rescues Post-Ischemic Heart Failure in a Preclinical Large Animal Model 2011-07-20T18:55:06.467Z "Similar mechanisms may be contributing to left ventricular hypertrophy, but this needs to be confirmed," he said. More heart risk with Restless Leg Syndrome: study 2011-04-04T15:15:18Z Because so little is known about his condition — known as left ventricular noncompaction — medical experts recommend against playing most competitive sports. Player?s Heart Condition Keeps L.I.U. on Edge 2011-03-16T00:00:03Z The components of blood pressure include systolic pressure, which results from ventricular contraction, and diastolic pressure, which results from ventricular relaxation. Anatomy and Physiology 2013-06-19T00:00:00Z This sum of factors, called the peripheral resistance, must be reached and passed by the force of the ventricular beat before one drop of blood is set in motion along the aorta. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z House eventually orders a typically risky test — a ventricular puncture, which would involve sticking a needle into Cute Cowboy's brain. House Watch: Return to the Dark Side 2011-03-15T07:35:00Z After surgery, however, echocardiograms of the patients' hearts showed structural "remodeling," including reductions in the left ventricular muscle mass and in the right ventricular cavity area. Study: Weight-Loss Surgery May Change the Shape of the Heart 2011-02-09T09:02:51Z People who receive the treatment for ventricular fibrillation have a 42 percent survival rate, he said. Panel Urges More Oversight on Defibrillators 2011-01-25T23:55:33Z Unlike ventricular fibrillation, which affects the heart's lower pumping chamber, AF is not immediately life-threatening. Drinking may raise risk of abnormal heart rhythm 2011-01-19T21:18:11Z The syncopal attacks are, in all probability, directly dependent upon a marked reduction of the ventricular rate. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z His new mechanical pump — a partial artificial heart known as a ventricular assist device — leaves patients without a pulse because it pushes blood continuously instead of mimicking the heart’s own beat. With New Heart Pump, Cheney Slowly Resumes Old Life 2011-01-04T19:30:46Z We haven't had enough experience yet about how to help people die naturally who have a ventricular assist device. Special Report: Life and death in the age of the bionic heart 2010-10-12T12:27:00Z Most studies, for instance, have focused on patients with ventricular fibrillation, in which the heart quivers instead of pumping out blood. Gaining on death, cooling therapy catches on slowly 2010-08-27T14:03:00Z Mr. Volpe is one of thousands of Americans who have had these pumps, called left ventricular assist devices, surgically implanted to help their failing hearts. A Heart Pump Ticks Down, and a Stranger Steps In to Help 2010-08-10T00:10:00Z The patient had three convulsions and died with edema of lungs about 30 hours after the attack of ventricular fibrillation. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z He received a left ventricular assist device, which is a small pump to improve heart function and is usually implanted only in patients with severe heart failure. Former VP Cheney released from hospital 2010-08-09T21:47:00Z Jenner expects the market for ventricular assist devices to be worth as much as $1 billion in five years time. Special Report: Life and death in the age of the bionic heart 2010-10-12T12:27:00Z The pumps are partial artificial hearts known as ventricular assist devices, and they come in various models. Doctor's World: Pump Device Helps Cheney With Steady Pressure 2010-07-19T17:39:00Z However, heart failure experts and published studies of ventricular assist devices sketch a general picture of his prognosis. Cheney's new heart pump not a miracle cure 2010-07-15T20:38:00Z The ventricular extrasystole on the contrary is commonly seen and readily recognized. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Examples: dedicated pediatric heart OR, remote patient monitoring, fetal electrocardiograph testing, ventricular assist devices, congenital heart disease clinic, heart failure program, diagnostic and interventional catheterization. Best Children's Hospitals 2010-11: Behind the Terms 2010-06-02T22:00:00Z The baby remained in the intensive care unit at Shady Grove for two weeks, but he needed specialized care, including a cardiac catheterization to repair a ventricular problem and a hole in his heart. 2010-01-05T05:00:00Z A little fluid is contained in the cerebral ventricles, which, under some pathological conditions, may increase greatly in quantity, so as to occasion considerable dilatation of the ventricular cavities. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4 "Bradford, William" to "Brequigny, Louis" Above the glottis and on opposite sides are two pockets or ventricles, and above these are the so-called false cords or ventricular bands. The Voice Its Production, Care and Preservation Most of those seen in the clinic have their origin in some part of the ventricular wall. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The contraction and relaxation of the muscular tissue of the heart, produce a diminution and enlargement of both auricular and ventricular cavities. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) Between the ventricular fold and the vocal fold on each side is a linear interval, which indicates the entrance to the ventricle of the larynx. Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. This appearance may be noticed beneath the pericardium, and pervading the whole thickness of the ventricular walls, and in extreme cases those of the fleshy columns in the interior of the heart. Special Report on Diseases of the Horse The upper ligaments are sometimes 18 called the false vocal cords, but are more properly termed ventricular bands. The Child-Voice in Singing treated from a physiological and a practical standpoint and especially adapted to schools and boy choirs It has also been shown that the independent auricular and ventricular rates vary somewhat, that of the auricle being in general faster than that of the ventricle. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z As for the particular fallacy contained in the theory of ventricular breath-control, that must be reserved for a later chapter. The Psychology of Singing A Rational Method of Voice Culture Based on a Scientific Analysis of All Systems, Ancient and Modern Above each true cord, and parallel with it, the ventricular fold or false cord is evident as a pink fold of mucous membrane. Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. It may involve a liability to sudden death from rupture of the ventricular walls. Special Report on Diseases of the Horse The ventricular bands help but slightly; and the epiglottis and the vocal cords little, if at all. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery Practically all degrees of heart block have been observed, namely, complete heart block and partial block with 4:1, 3:1, and 2:1 rhythm, and occasionally ventricular silences. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Both of the auricles and both of the ventricles contract at the same, time, the ventricular contraction following closely upon the contraction of the auricles. Disease and Its Causes The heart-sounds were regular, and the elevation of the skin by the blade coincided with the ventricular systole. Anomalies and Curiosities of Medicine The ventricular cavity should now be opened up as far as the aorta, and the semilunar valves examined. A Practical Physiology The operation of ventriculocordectomy consists in removing a vocal cord and the portion or all of the ventricular floor by means of a punch forceps introduced through the direct laryngoscope. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery The apoplectiform attacks are most probably caused by venous congestion when the slowing of the ventricular contractions is not sufficient to cause convulsions, but will just cause complete unconsciousness. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z Other terms applied to the condition have been "ventricular rhythm," "nodal rhythm" and "rhythm of auricular paralysis." Disturbances of the Heart His explanations were practically the same as those given to-day—first the contraction of the auricle, sending blood into the ventricle; then ventricular contraction, making the pulse, and sending the blood into the arteries. A History of Science — Volume 2 The supraglottic type consists in an edematous thickening around the base of the epiglottis, sometimes involving also the glossoepiglottic folds and the ventricular bands. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery The spasmodically adducted vocal cords are partially hidden by the over-hang of the spasmodically prominent ventricular hands. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery Such hearts always show increase in thickness of the ventricular wall. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z This irregular ventricular contraction sometimes displaces the apex beat. Disturbances of the Heart At other times he may be conscious of irregular, strong throbs or pulsations of the heart, as such hearts often give an occasional extra sturdy ventricular contraction. Disturbances of the Heart The next lesser decline shows ventricular diastole, or the heart rest. Disturbances of the Heart Closure of the larynx is accomplished by the approximation of the ventricular bands, arytenoids and aryepiglottic folds, the latter having a sphincter-like action, and by the raising and tilting of the larynx. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery The diagnosis of the right ventricular hypertrophy may be substantiated by a fluoroscopic examination. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The auricles of the heart may act more energetically than normal, and precede as usual the ventricular contraction; or the auricles and ventricles may contract almost together—a so-called "nodal" type of contraction. Disturbances of the Heart In an irregularly acting heart the systolic pressure may vary greatly, from 10 to 20 mm. or more, and a ventricular contraction may not be of sufficient power to open the semilunar valves. Disturbances of the Heart There may be a ratio of auricular contractions to ventricular contractions, according to Fulton, of 2:1, 3:1, 4:1 and 5:1, the 2:1 ratio being most common. Disturbances of the Heart The ventricular bands or false vocal cords vicariously phonate in the absence of the true cords, and assist in the protective function of the larynx. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery The constant presence of right ventricular hypertrophy is interesting, the heart dullness extends, as a rule, far to the right of the sternum. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z The attacks of syncope are doubtless due to anemia of the medulla, because of the infrequent ventricular contractions. Disturbances of the Heart The immediate following second rise not so high as that of the auricular contraction is known as the ventricular wave, and corresponds to the dicrotic wave in the radial. Disturbances of the Heart In the last few years it has been discovered that the auriculoventricular handle, or "bundle of His," has a necessary function of conductivity of auricular impulse to ventricular contraction. Disturbances of the Heart The ventricles are not visible by mirror laryngoscopy, but are readily exposed in their depths by lifting the respective ventricular bands with the tip of the laryngoscope. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery In the second type, where there was normal auricular activity, but where the ventricular contractions were decreased, atropin affected an increase in the number of ventricular contractions, but did not completely remove the heart block. Disturbances of the Heart When ventricular fibrillation occurs, the condition is serious and the prognosis bad. Disturbances of the Heart The number of ventricular contractions was increased, but not enough to indicate the complete removal of the heart block. Disturbances of the Heart |
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