室内束支阻滞常见于冠心病、原发或继发性心肌病、风湿病、先心病等。人们常担心它会引起更严重的传导障碍并增加房室传导阻滞与缓慢型心律失常死亡的危险性。作者前瞻性地研究554例慢性双束支与三束支传导阻滞平均达3.5年(6—78个月),旨在确定“高危险性”束支阻滞者房室传导阻滞、死亡、猝死、缓慢性心律失常所致死亡 Indoor bundle branch block common in coronary heart disease, primary or secondary cardiomyopathy, rheumatism, congenital heart disease. People often worry that it will cause more serious conduction disorders and increase the risk of atrioventricular block and death from arrhythmia. The prospective study of 554 patients with chronic dual bundle branch and bundle branch block average of 3.5 years (6-78 months), to determine the “high risk” bundle branch block in atrioventricular block, death , Sudden death, death due to bradyarrhythmia