Abstract —The phase relationships between heart rate variability, respiration, forearm skin blood flow oscillations (according to laser Doppler flowmetry), and finger-pad tissue blood volume oscillations (according to photoplethysmography) were analyzed in relatively healthy volunteers at rest. The degree of synchronization between phases of analyzed signals was estimated based on the value of the phase wavelet coherence function. A significant phase synchronization was detected between forearm skin blood flow oscillations and finger-pad tissue blood volume oscillations in the low frequency region (0.0095–0.1 Hz) and at the frequency of heart rate of ~ 1 Hz. At a respiration rate of ~0.3 Hz, differences were detected in the phase synchronization of peripheral hemodynamic oscillations (blood volume and blood flow) with both heart rate variability and respiration. For finger-pad tissue blood volume oscillations, a high phase synchronization with both heart rate variability and respiratory rate was observed; for forearm blood flow oscillations, low phase synchronization occurred in both cases.

中文翻译：

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人体心血管系统振荡过程的相位关系分析

摘要 —在相对健康的静息志愿者中，分析了心率变异性、呼吸、前臂皮肤血流振荡（根据激光多普勒血流仪）和指垫组织血容量振荡（根据光电容积描记法）之间的相位关系。基于相位小波相干函数的值估计分析信号的相位之间的同步程度。在低频区域 (0.0095–0.1 Hz) 和约 1 Hz 的心率频率下，在前臂皮肤血流振荡和指垫组织血容量振荡之间检测到显着的相位同步。在~0.3 Hz 的呼吸频率下，在外周血流动力学振荡（血容量和血流量）与心率变异性和呼吸的相位同步中检测到差异。对于指垫组织血容量振荡，观察到心率变异性和呼吸频率的高相位同步；对于前臂血流振荡，两种情况均发生低相位同步。