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目的 研究心脏自主神经功能调节在冠心病室早发生机制中的作用.方法 动态心电监测冠心病频发室早非心梗患者 2 0例 ,对 2 4h连续R -R间期标准差 (SDNN)及室早昼夜发生频次进行统计学分析.结果 SDNN值和室早发生频次存在明显的昼夜节奏变化和相关性.结论 冠心病室早发生与交感神经活动性增强有关.“,”Objective To study the effect of automatic nervous system adjustment of the occurrence mechanism of premature ventricular (P.V.C.). Methods 20 patients of coronary heart disease (non myocardial infarction) were monitored for 24 hours and ambulatory electrocardiogram was detected. The SDNN and dynamity day and night were analyzed in statistics. Results The SDNN and the frequency of P.V.C. existed obvious correlatively. Conclusion The occurrence of P.V.C. in coronary disease had bearing on the sympathetic activity increase.