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71例正常成人,年龄在24～74岁。其中,高年组(≥50岁)25例,低年组(<50岁)46例;男性42例,女性29例。均进行 Holter 心电图观察,发现高年组平均最低心率比低年组高,女组比男组高;男组最低心率出现时间比女组略早。睡时平均最低心率比醒时慢,且波动幅度比醒时明显变小,其幅度与性别、年龄无关。平均心率以1～3月和10～12月时偏高。71例睡时最低心率正常值95%上限为66次/min,下限为41次/min;醒时上限为76次/min,下限为50次/min。认为病理性窦性心动过缓,睡时应低于41次/min,醒时应低于50次/min。
71 cases of normal adults, aged 24 to 74 years old. Among them, 25 cases were in high-grade group (≥50 years old) and 46 cases in low-grade group (<50 years old); 42 were male and 29 were female. Holter electrocardiogram were observed and found that the average lowest heart rate in senior high group than in the low group, women group higher than the male group; male group minimum heart rate appeared earlier than the female group. When sleeping, the mean minimum heart rate was slower than that of waking hours, and the amplitude of fluctuation was significantly smaller than that of waking up. The range of amplitude was not related to gender and age. The average heart rate in January to March and 10 to December high. 71 cases of sleep when the minimum heart rate 95% of the upper limit of 66 beats / min, the lower limit of 41 beats / min; awake when the upper limit of 76 beats / min, the lower limit of 50 beats / min. That pathological sinus bradycardia, sleep should be less than 41 beats / min, when awake should be less than 50 beats / min.