应用24小时动态心电图观察以心脏病为主的连续1128例病人,发现无症状短程阵发性房性心动过速(PAT)共279例,检出率24.7％。其时间规律为夜间少,白天逐渐增多,中午达高峰,集中趋势在12点48分。非卧床状态下发生阵数是卧床休息状态下的二倍。检出率随年龄而增加。大部分PAT为自律性心律失常,提示植物神经通过体液因素影响其时间规律。 A total of 1128 consecutive patients with heart disease were observed by 24-hour Holter monitoring. A total of 279 patients with asymptomatic paroxysmal atrial tachycardia (PAT) were found, with a detection rate of 24.7%. The law of time is less at night, gradually increased during the day, reaching a peak noon, the concentration of the trend at 12:48. The number of occurrences in ambulatory conditions is twice as long as in bed rest. Detection rate increases with age. Most of the PAT is self-regulating arrhythmia, suggesting that autonomic nerves affect their timing through humoral factors.