【摘要】 为了解国人心率变异（HRV）时域法指标正常值,检测1524例17—94岁健康人24h动态心电图,分析HRV时域法5项指标。结果显示:（1）SDNN、SDANN、SDNN_Index,rMSSD和PNN₅₀均值分别为127±33、116±32、49±14、29±12（ms）和8±9％,与国内研究一致。（2）HRV时域法各指标随年龄增加而降低（r=0.30——0.48,P<0.01）,中青年组与老年组HRV差异有显著意义（P<0.01）。（3）男性SDNN、SDANN和SDNN_Index大于女性（P<0.05）,而rMSSD和PNN₅₀小于女性（P<0.05）。SnNN、SDANN、SDNN_Index和rMSSD单侧下限值分别为73、64、26和9ms,PNN₅₀呈偏态分布,临床意义有待探讨。更多还原

【Abstract】 In order to understand normal value of heart rate variability (HRV) time domain measures in Chinese, 24-hour ambulatory electrocardiographic recordings of 1524 healthy subjects were analyzed. Results showed:(1) Average vaules of SDNN, SDANN, SDNNIndex, rMSSD and PNN50 were 127±33, 116±32, 49±14, 29±12 (ms) and 8±9% respectively, which were similar to results in other studies reported in China.(2) HRV time domain measures decreased with increased ages (r =-0.30- -0. 48,P < 0.01 ).HRV revealed significant difference between young-middle and eldly groups ( P < 0. 01 ). (3) SDNN, SDANN and SDNNIndxe of male were higher than those of female ( P < 0. 05 ), but rMSSD and PNN50 lower than of female ( P < 0. 05 ). Low-limit vaules of SDNN, SDANN, SDNNIndex and rMSSD were 73, 64, 26 and 9ms. Authors maintain that clinical sighificance of PNN50 in skew distribution needs further discussion.更多还原