急性心肌梗塞的发病,每个病人可以不同。它可以由新近发生的劳累性心绞痛迅速发展而来,也可由原来的劳累性心绞痛呈恶性型发展而来,部分病人则由原来的自发性心绞痛发展而来。临床表现可分为典型与不典型两大类型。一、典型(类型)的临床表现:先兆(前驱)症状:约5～81.2%病例在发病前数日至数周内出现乏力、胸部不适、活动时心悸、气急、烦躁、心绞痛等前驱症状,而以 The incidence of acute myocardial infarction, each patient can be different. It can be developed rapidly from the recent onset of exertional angina or from the original form of exertion of angina pectoris. Some patients develop from the original angina pectoris. Clinical manifestations can be divided into two types of typical and atypical. First, the typical (type) clinical manifestations: aura (precursor) symptoms: about 5 ~ 81.2% cases in the days before the onset of a few days to several weeks of fatigue, chest discomfort, palpitations, shortness of breath, irritability, angina and other prodromal symptoms, And to