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心绞痛是心肌缺血的常见临床病志,也是冠心病人求医的主要症状.近年来发现在冠心病患者中,无症状性心肌缺血的发作远较心绞痛发作多见。无症状心肌缺血系指心肌的灌注、功能或电活动发生短暂性改变,而致缺乏胸痛症状、在心电图上表现为缺血必的ST-T改变。这种情况可见于无冠心病史和梗塞后的无症状者及心绞痛病人。无痛性心肌梗塞临床也不少见。据流行病学研究,25%以上的心肌梗塞可以无症状,而其预后同症状性心肌梗塞同样严重。
Angina pectoris is a common clinical symptom of myocardial ischemia, but also the main symptoms of coronary heart disease patients seeking treatment in recent years found that patients with coronary heart disease, asymptomatic myocardial ischemia episodes more common than angina pectoris. Asymptomatic myocardial ischemia refers to the myocardial perfusion, transient changes in function or electrical activity, resulting in lack of chest pain symptoms, the performance of the ischemic ST-T changes on the ECG. This situation can be seen in the history of coronary heart disease and asymptomatic after infarction and angina patients. Painless myocardial infarction clinical is not uncommon. According to epidemiological studies, more than 25% of myocardial infarction can be asymptomatic, and its prognosis is as serious as symptomatic myocardial infarction.