论文部分内容阅读
应用动态心电图仪，定量观察了３０例健康老年人和３５例健康青年人的心率变异性（ＨＲＶ）。结果显示：健康老年人的Ｒ－Ｒ间期、Ｒ－Ｒ间期的标准差（ＳＤＮＮ）、相邻Ｒ－Ｒ间期之差的均方根值（ｒＭＳＤ）、相邻心搏的Ｒ－Ｒ间期之差大于５０ｍｓ的心搏总数的百分比（％ＲＲ５０）、低频能谱密度（ＬＦＰＳＤ）、高频能谱密度（ＨＦＲＳＤ）、白昼均明显低于夜间（Ｐ＜０．０５）。青年组和老年组一样，也存在着显著昼夜变化规律（Ｐ＜０．００１）。健康老年人与健康青年人的心率变异高峰时间均在清晨３：００～５：００。ＨＲＶ各项指标除Ｒ－Ｒ间期外，老年人均明显低于青年人（Ｐ＜０．００１）。提示：健康老年人的ＨＲＶ呈一定规律的昼夜节律和随增龄下降以及低频与高频能谱密度的比值（ＬＦ／ＨＦ）随增龄而增加（Ｐ＜０．００１）的特点，讨论了发现该特点的重要意义。
Holter monitor was used to quantitatively observe the heart rate variability (HRV) in 30 healthy elderly and 35 healthy young people. The results showed that the R-R interval, the standard deviation of R-R interval (SDNN), the root mean square value of difference between adjacent R-R intervals (rMSD), R- The percentages of RR (% RR50), LFPSD (high frequency energy spectrum density) and HFRSD (> 50 ms) were significantly lower than those at night (P <0.05). As in the older group, there was also a significant diurnal variation (P <0.001). The peak time of heart rate variability of healthy elderly and healthy young people is in the morning from 3:00 to 5:00. HRV indicators except R-R interval, the elderly were significantly lower than the young (P <0.001). Hint: The HRV of healthy elderly showed a regular circadian rhythm and the characteristics of decreasing LF / HF ratio with increasing age (LF / HF) with increasing age (P <0.001) Discover the significance of this feature.