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This study aims to explore the effects of heat and cold stress on the radial pressure pulse (RPP) and heart rate variability (HRV). The subjects immersed their left hand into 45°C and 7°C water for 2 minutes. Sixty healthy subjects (age 25 ± 4 yr; 29 men and 31 women) were enrolled in this study. All subjects underwent the supine temperature measurements of(More)
In this article, we analyze the arterial pulse in the spectral domain. A parameter, the spectral harmonic energy ratio (SHER), is developed to assess the features of the overly decreased spectral energy in the fourth to sixth harmonic for palpitation patients. Compared with normal subjects, the statistical results reveal that the mean value of SHER in the(More)
This study analyzed the exponential decay characteristic of the harmonic peaks in the spectrum of blood pressure wave (BPW) from radial artery at wrist. Low-order harmonic deviation (LHD), high-order harmonic deviation (HHD), total harmonic deviation (THD) and exponent (alpha) were developed to assess the exponential decay feature of normal subjects (N(More)
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