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急性心肌梗塞(急梗)并发低血压或休克是病情凶险之征。低血压是指收缩压≥80或<100mmHg,无明显末梢循环障碍征象,是急梗后心排血量下降所致,但亦有相当一部分低血压合并其它因素。及时发现和处理,可使血压回升,病情缓解。预后一般良好。严重低血压(收缩压<80mmHg),可呈休克状态,病人意识不清或朦胧,四肢厥冷,呼吸困难,冷汗和紫绀,尿量减少,约占住院急梗病人中的10～15％。休克病人左室梗塞坏死面积至少占40％以上,病死率极高。
Acute myocardial infarction (acute infarction) complicated by hypotension or shock is a sign of danger. Hypotension refers to the systolic blood pressure ≥ 80 or <100mmHg, no signs of peripheral circulatory disorders, acute myocardial infarction is due to decreased cardiac output, but there are also a considerable part of other factors associated with hypotension. Timely detection and treatment, blood pressure can rise, the disease eased. The prognosis is generally good. Severe hypotension (systolic blood pressure <80mmHg), was shocked, the patient unconsciousness or hazy, extremities cold, dyspnea, cold sweat and cyanosis, decreased urine output, accounting for about 10 to 15% of hospitalized patients with acute myocardial infarction. Shock patients with left ventricular infarction necrosis at least 40% of the area, high mortality.