本文报告5例急性心肌梗塞后发生间歇性束枝传导阻滞,它的特点是与心率有关,心率过速和心率过缓时发生阻滞,中等度心率时则无阻滞。这5例都在急性梗塞发病后12～36小时内出现上述间歇性阻滞(1例呈右束枝阻滞,4例呈左束枝阻滞,3例并伴有不同程度的房室传导阻滞)。3例于2～12小时后呈持续性束枝传导阻滞,其中1例旋即死亡,另2例过24小时后又呈间歇性束枝传导阻滞。存活的4例中只有1例在48小时后就不再有传导阻滞,其余3例已随访3～6 This article reports the occurrence of intermittent bundle branch block in five patients with acute myocardial infarction. It is characterized by heart rate, with a block of heart rate over and slow heartbeat, and no block of moderate heart rate. All of these five patients experienced the above intermittent blockade within 12-36 hours after onset of acute infarction (one with right bundle branch block, four with left bundle branch block, and three with varying degrees of atrioventricular conduction Block). Three cases showed persistent bundle branch block after 2 ~ 12 hours, of which 1 died immediately and the other 2 cases showed intermittent bundle branch block after 24 hours. Only one of the four surviving patients had no conduction block after 48 hours, and the remaining three were followed up for 3-6