自发型心绞痛(SA)是指发作与心肌耗氧量增加无明显关系的一组心绞痛,是由于冠状动脉可逆性痉挛造成的一过性心肌供血骤降所致。亦有人称之为休息时心绞痛。实际上后者不完全等于前者,因SA可发生在休息时,也可发生在一般活动时;再则如卧位 Spontaneous angina (SA) refers to the onset of myocardial oxygen consumption increased with no significant relationship between a group of angina pectoris, is due to reversible coronary artery spasm caused by transient myocardial blood supply plummeted. Others call angina at rest. In fact, the latter is not exactly equal to the former, because SA can occur at rest, but also during general activities;