三分支阻滞同时伴有连续9个P波受阻,是较少见的心电表现,现将所遇1例报告如下.患儿,女,4岁.患儿于5月前开始,经常晕倒在地,每次1～2秒钟,平均每天4～5次,发作前哭闹,发作时抽搐.无口吐白沫及两便失禁等.检查:胸骨左缘2、3肋间可闻及互级收缩期杂音.超声心动图:主动脉与肺动脉内径之比为15:16,左室大34mm, Three-legged block accompanied by 9 consecutive P wave blocked, is a rare ECG, the experience will be encountered in 1 case reported as follows. Children, female, 4 years old. Children starting before May, often halo On the ground, every 1 to 2 seconds, an average of 4 to 5 times per day, before the onset of crying, seizures, convulsions. No spit foam and two incontinence, etc. Check: the left sternal 2,3 intercostal Smell each other systolic murmur.Echocardiography: aortic and pulmonary artery diameter ratio of 15:16, left ventricular large 34mm,