Rest tends to relieve stable angina, whereas unstable angina and vasospastic angina can occur anytime, including at rest.

休息可缓解稳定型心绞痛，而不稳定型心绞痛和血管痉挛型心绞痛可随时发生，包括休息时。

Other heart conditions that might lead to stable angina are ones that cause a thickened heart muscle wall, which would require more oxygen.

其余可能造成稳定型心绞痛的心脏问题有心肌肥厚等：肥厚的心肌需要更多氧气。

If the blood levels remain normal, they have pure ischemia on stable angina.

如果血液水平保持正常，则稳定型心绞痛会出现完全缺血。

In the majority of cases, the underlying cause of stable angina is atherosclerosis of one or more the coronary arteries—arteries supplying blood to the heart muscles.

大多数情况下，稳定型心绞痛的根本原因是一至多个冠状动脉（供应心肌的动脉）发生粥样硬化。

It's during these time of exertion or emotional stress that people with stable angina have chest pain, since the blood flow isn't meeting the metabolic demands of the heart muscle, or myocardium.

稳定型心绞痛患者在劳累或情绪激动时会胸痛发作，因为此时血供跟不上心肌代谢的需要。

Unstable angina, for the same reason as stable angina, involves subendocardial ischemia and it should be treated as an emergency, because patients are at a high risk of progressing to myocardial infarction, or heart attack.

不稳定型心绞痛，和稳定型心绞痛病因一样，因心内膜下层缺血，应按急症救治，因为患者高发心肌梗死或心脏病。

Stable angina or chronic angina is the most common type of angina and it usually happens when the patient has greater than or equal to 70% stenosis, meaning 70% of the artery is blocked by plaque buildup.

稳定型心绞痛/慢性心绞痛是最常见的心绞痛类型，通常发生于病人有>=70%狭窄时，即动脉管腔被形成的斑块阻塞70%。