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目的 评价老年人群心率变异性 (heartrate variability,HRV)减低与心血管事件的关系。方法 回顾性分析我院干部查体 2 4h动态心电图 HRV资料与心血管事件的关系。共 390例。HRV分析包括时域分析和频域分析。时域分析包括正常 RR间期的标准差 (SDNN) ;5 m in平均 RR间期的标准差 (SDANN) ;相邻 RR间期之差的均方根值 (r MSSD) ;爱丁堡指数 (PNN5 0 ) ,频域分析用快速傅立叶转换方法获得心率功率谱密度。并分析总频谱 (TF,0 .0 1～ 0 .5 0 Hz) ,低频 (L F,0 .0 4～ 0 .15 Hz)成分 ,高频(HF,0 .15～ 0 .40 Hz)成分和低频与高频比率 (L F/ HF)。心血管事件包括急性心肌梗死 ,心力衰竭 ,持续性室性心动过速 ,心室颤动 ,心脏性死亡 (包括心脏性猝死 )。比较查体者有和无心血管事件组之 SDNN,SDANN,RMSSD,PNN5 0 ,L F,HF,TF和低频与高频比率 (L F/ HF)有无差别。 结果 有 2 9例老年人发生心血管事件 (n=2 9) ,有心血管事件组之 SDNN为 (91.7± 30 .3) ms,SDANN(84.6± 2 7.9) ms,r MSSD(2 0 .8± 8.8) ms,PNN5 0 (3.8± 5 .0 ) % ,L F(85 .5± 6 9.3) m s2 ,HF(5 2 .1± 35 .5 ) ms2 ,TF(333.3± 2 2 1.2 ) m s2 ,L F/ HF1.6± 1.0。无心血管事件组 (n=36 1)之 SDNN为 (115 .8± 39.2 ) m s,SDANN(10 3.0±
Objective To evaluate the relationship between heart rate variability (HRV) and cardiovascular events in the elderly population. Methods Retrospective analysis of our hospital cadres 24 hours ambulatory HRV data and cardiovascular events. A total of 390 cases. HRV analysis includes time domain analysis and frequency domain analysis. Time domain analysis included the standard deviation (SDNN) of the normal RR interval; the standard deviation of 5 m in mean RR interval (SDANN); the root mean square (r MSSD) of the difference between adjacent RR intervals; the Edinburgh index (PNN5 0), and the frequency domain analysis uses the fast Fourier transform method to obtain the heart rate power spectral density. (TF, 0.010 ~ 0.05 Hz), low frequency (LF, 0.04 ~ 0.15Hz) and high frequency (HF, 0.15 ~ 0.40 Hz) And low frequency to high frequency ratio (LF / HF). Cardiovascular events include acute myocardial infarction, heart failure, persistent ventricular tachycardia, ventricular fibrillation, cardiac death (including sudden cardiac death). To compare the SDNN, SDANN, RMSSD, PNN50, LF, HF, TF and Lf / HF ratio between those with and without cardiovascular events. RESULTS: Twenty-nine elderly patients had cardiovascular events (n = 29), with SDNN of (91.7 ± 30.3) ms, SDANN (84.6 ± 2 7.9) ms, and rMSSD (8.8 ± 5.0)%, LF (85.5 ± 6 9.3) m s2, HF (52.1 ± 35.5) ms2 and TF (333.3 ± 2 2 1.2) m s2, LF / HF1.6 ± 1.0. The SDNN of non-cardiovascular events group (n = 361) was (115.8 ± 39.2) m s, SDANN (10 3.0 ±