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Individual variation of heart rate variability in Japanese population.

日本人群心率变异性的个体差异。

基本信息

批准号：
15370104
负责人：
KOBAYASHI Hiromitsu
金额：
$ 6.21万
依托单位：
Ishikawa prefectural nursing university
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

项目摘要

Spectral components of heart rate variability (HRV) were repeatedly measured (4-8 measurements; mean: 6 measurements) in 75 healthy Japanese male subjects (age range:20-61) under two postural conditions (standing and supine). Low-frequency (LF) and high-frequency (HF) components and mean heart rate (HR) were analyzed with special reference to individual variations, which were classified into two types : inter-(interV) and intra-individual variations (intraV). The percent contributions and coefficients of variations were calculated for both interV and intraV. Percent contributions of intraV (intraV%) of HR with standing and supine postures were 15.8 and 12.9%, respectively. The intraV% of HF and LF on standing were 31.5 and 26.5%, while those in the supine posture were 27.8 and 35.5%, respectively. The coefficients of interV (interCV) and intraV (intraCV) were also calculated. The interCVs of HR,HF, and LF on standing were 14.9,41.4,nd 48.4%, while those in the supine posture registered 16.2,42.9,and 44.2%, respectively. The intraCVs of HR, HF, and LF on standing were 5.0, 19.7, and 21.2%, while those in the supine posture indicated 4.7, 20.1, and 23.0%, respectively. We also calculated the interV and intraV of logarithmic-transformed HRV indexes. The log-transformation remarkably diminished both variables: interCV and intraCV registered 14-16 and 6-7%, respectively. Although interV variations were considerabley large, intraV variations of HRV were negligibley small. The HRV indexes decreased with age, although HR remained unchanged. The coefficients of determination (r^2) were 14-34%. In the case of log-transformed HRV indexes, the coefficients of determination registered 9-15%, suggesting that 14-34% (raw) or 9-15% (log) of the observed interV may be due to variations in age.

在两种姿势条件下（站立和仰卧），对75名健康日本男性受试者（年龄范围：20-61岁）重复测量心率变异性（HRV）的频谱成分（4-8次测量;平均：6次测量）。低频（LF）和高频（HF）成分和平均心率（HR）进行了分析，特别参考个体变异，分为两种类型：间（interV）和个体内变异（intraV）。计算了V间和V内的贡献百分比和变异系数。直立和仰卧姿势的HR的V内贡献百分比（V内%）分别为15.8%和12.9%。站立位时HF和LF的intraV%分别为31.5%和26.5%，而仰卧位时分别为27.8%和35.5%。还计算了间期（interCV）和间期内（intraCV）的系数。立位时HR、HF、LF间期分别为14.9%、41.4%、48.4%，仰卧位时分别为16.2%、42.9%、44.2%。站立时HR、HF和LF的内CV分别为5.0、19.7和21.2%，而仰卧位时分别为4.7、20.1和23.0%。我们还计算了运动学转换的HRV指标的intervV和intraV。对数转换显著降低了两个变量：interCV和intraCV分别记录了14- 16%和6- 7%。虽然HRV的V间变异很大，但V内变异很小。心率变异性指标随年龄增长而下降，但心率不变。决定系数（r^2）为14- 34%。在对数转换的HRV指数的情况下，确定系数登记9- 15%，表明14-34%（原始）或9-15%（对数）的观察到的间期可能是由于年龄的变化。