对50例无症状性早搏小儿进行24小时Holter心电图监测,分析其早搏数量、级别、形态、昼夜变化规律及远期预后结果,并制订抗心律失常药治疗指征及探讨可能发病机制。本组仅6例需用抗心律失常药治疗。其室性早搏及房性早搏按Lown及Kleiger分级均以1～2级为多。按Yanaga分类法以日间型为多。早搏高峰期与心率高峰期基本一致,夜间心率慢,早搏减少57.6%,级别严重度降低48.5%。白天活动后心率快,早搏虽增多,但无自觉症状。本组经2～10年随访,早搏自行消失或好转占65.7%,仅1例转为多源性早搏。 Fifty patients with asymptomatic premature beat were monitored by Holter electrocardiogram for 24 hours. The quantity, level, morphology, diurnal variation and long-term prognosis of premature beats were analyzed. The indications of antiarrhythmic drug treatment and the possible pathogenesis were discussed. Only 6 cases of this group need to be treated with antiarrhythmic drugs. The ventricular premature beats and atrial premature beats by Lown and Kleiger grading are more than 1 to 2. According to Yanaga classification of daytime type. The peak of premature beat was consistent with the peak of heart rate, nighttime heart rate was slow, premature beat was reduced by 57.6%, and grade severity was reduced by 48.5%. Heart rate after daytime activities, although the increase in premature beats, but no symptoms. The group after 2 to 10 years of follow-up, spontaneous premature beats disappeared or improvement accounted for 65.7%, only 1 case converted to multi-source premature beats.