正常人中出现心脏第二度房室传导阻滞者很少见,但在年青的运动员中则比较常见,国内外已有许多报道。运动员中出现的心脏第二度房室传导阻滞多数属功能性改变,近年来Holter心电图的应用发现临床上正常的大学生等在夜间睡眠时可出现二度房室传导阻 The second heart rate in normal adults with atrioventricular block is rare, but young athletes are more common, there have been many reports at home and abroad. The heart appeared in athletes The second degree of atrioventricular block is a functional change in most Holter ECG applications in recent years found that clinically normal students such as sleep at night can occur when a second degree of AV conduction resistance