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９３例无痛性急性心肌梗塞（ＰＡＭＩ）中６４例≥６０岁。首发症状依次为心衰型２７例，胃肠型２５例，脑卒中型１７例，胸闷心悸型１４例，头肩肢痛型７例，发热感染型３例。与有痛组２０８例对照分析，在梗塞部位（前、下后壁、右室壁）、梗塞范围、吸烟、再发梗塞方面无显著性差异（Ｐ＞０．０５）；而在年龄、入院时间、心内膜下梗塞、心电图分期、高血压、糖尿病、误诊及死亡例数上有显著性差异（Ｐ＜０．０５～０．０１）。两组死亡病人有关情况比较后进一步显示：年龄大，入院时间晚，误诊率高，并存、并发症多，是ＰＡＭＩ病死率增高的主要因素。ＰＡＭＩ死亡以泵衰竭为多见。
Of the 93 patients with painless acute myocardial infarction (PAMI), 64 were ≥60 years old. The first symptom was followed by 27 cases of heart failure, 25 cases of gastrointestinal type, 17 cases of stroke, 14 cases of chest tightness and palpitation, 7 cases of head and shoulder pain, 3 cases of fever and infection. There was no significant difference (P> 0.05) in the infarction area (front, lower posterior wall, right ventricular wall), infarct size, smoking and recurrent infarction in 208 cases with painful group (P> 0.05) Time, subendocardial infarction, electrocardiogram staging, hypertension, diabetes mellitus, misdiagnosis and death cases were significantly different (P <0.05 ~ 0.01). Comparison of the two groups of patients after death further shows that: older, late admission, misdiagnosis rate, coexistence, complications, is the main factor in increased mortality of PAMI. PAMI death is more common in pump failure.