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Voluntary cardiorespiratory synchronization: heart rate variability as a function of age, tidal volume and body position

机译：自愿性心肺同步：心率变异性随年龄，潮气量和体位的变化

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A technique of voluntary cardiorespiratory synchronization (VCRS), where the respiration rate is synchronized at a sub-multiple of the heart rate (1:5), was used to investigate heart rate variability (HRV) in 14 subjects as a function of age, body position, and respiratory tidal volumes of 500 ml and 1000 ml. Following a tone, the subjects inspired for two heart beats and expired for three beats. Subjects were grouped according to age into two groups (20 to 30 and 46 to 57). The results showed no statistically significant change with tidal volume but a significant decrease in HRV with age. Changing from sitting to supine showed a slight increase in HRV for the younger group whereas the older group showed a decrease. Because a constant phase relationship between respiration and the heart beats is maintained, VCRS is an easy to use method to measure the influence of each phase of the respiratory cycle on the HR and blood pressure due to the mechanical action of respiration.
机译：使用自愿性心肺同步（VCRS）技术将呼吸速率同步为心率（1：5）的几倍，用于研究14个受试者随年龄变化的心率变异性（HRV），体位和呼吸潮气量分别为500 ml和1000 ml。听到一个音调后，受试者鼓舞了两个心跳，并以三个节拍消失。根据年龄将受试者分为两组（20至30岁和46至57岁）。结果显示，潮气量没有统计学上的显着变化，但是HRV随着年龄的增长而显着下降。从坐着改为仰卧，较年轻的组HRV略有增加，而较年长的组HRV有所降低。由于维持了呼吸和心跳之间恒定的相位关系，因此VCRS是一种易于使用的方法，可以测量由于呼吸的机械作用而导致的呼吸周期各相对HR和血压的影响。

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