心包炎通常发生在急性心肌梗塞(MI)后数天内。发病率因诊断标准而异,28％以上病人出现典型的心包痛,7～19％病人可听到心包摩擦音。尸体解剖证实40％病例发现有心包炎。心包炎伴发于较大的梗塞,继而发生左心室衰竭及室上性(特别是房颤)和室性心律失常。相反,MI 后很少看到有临床意义的心包积液。有报告使用 M 型超声心动仪诊断梗塞后早期的心包积 Pericarditis usually occurs within days after acute myocardial infarction (MI). The incidence varies according to diagnostic criteria, with more than 28% of patients presenting with typical pericardial pain and 7-19% of patients receiving pericardial frictional sound. Autopsy confirmed that 40% of cases were found to have pericarditis. Pericarditis associated with larger infarcts, followed by left ventricular failure and supraventricular (especially atrial fibrillation) and ventricular arrhythmias. In contrast, rarely seen clinically meaningful pericardial effusion after MI. There are reports using M-mode echocardiography to diagnose early pericardial infarction