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不稳定型绞痛是介于稳定型心绞痛与急性心肌梗塞间的过渡病型,本型是冠状血流急剧减少、侧支循环尚未及时建立、心肌缺血超越其代偿能力和耐受限度而引起一系列病理改变的症状群。约50%可演变为急性心肌梗塞,部分可因心电不稳定而发生原发性室颤甚至猝死,但如能及时发现并处理得当,也可逆转为稳定型心绞痛。
Unstable angina pectoris is a transitional type between stable angina pectoris and acute myocardial infarction. This type of coronary blood flow is drastically reduced, collateral circulation has not been established in time, and myocardial ischemia exceeds its compensatory capacity and tolerance limit A group of symptoms that cause a number of pathological changes. About 50% can evolve into acute myocardial infarction, some may be due to unstable ECG and occurrence of primary ventricular fibrillation or even sudden death, but if promptly found and handled properly, can be reversed to stable angina.