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本病临床表现与梗塞的部位、大小、侧支循环情况密切相关。先兆症状心肌梗塞的发病多数是突然发生,但约1/2～2/3的急性心肌梗塞患者在起病前数日至数周有乏力、胸翳、心悸、气短、烦躁、心绞痛等前驱症状。其中以新发生心绞痛或原有心绞痛加重。表现为发作频繁、疼痛剧烈、伴恶心、呕吐,持续较久,对硝酸甘油疗效差,诱因不明。发作时心电图示ST-时性明显压低或抬高,T波倒置或增高,提示近期内
The clinical manifestations of the disease and infarction location, size, collateral circulation are closely related. Acute MI Myocardial infarction occurs mostly suddenly, but about 1 in 2 to 2 in 3 acute MI patients have symptoms of fatigue such as chest pain, palpitations, shortness of breath, irritability, angina and other symptoms for several days to several weeks before onset . Among them, new angina or aggravating angina pectoris. The performance of frequent seizures, severe pain, with nausea, vomiting, lasted longer, poor efficacy of nitroglycerin, the cause is unknown. Seizure ECG ST-hourly marked depression or elevation, T wave inversion or increase, suggesting that the near future