The exponential decay characteristic of the spectral distribution of blood pressure wave in radial artery

Authors:
Ching-Chuan Wei;Chin-Ming Huang;Yin-Tzu Liao
Affiliations:
Department of Information and Communication Engineering, Chaoyang University of Technology, Taichung, Taiwan;Graduate Institute of Chinese Medical Science, China Medical University, Taichung, Taiwan;Graduate Institute of Chinese Medical Science, China Medical University, Taichung, Taiwan
Venue:
Computers in Biology and Medicine
Year:
2009

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Abstract

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 (@a) were developed to assess the exponential decay feature of normal subjects (N group) and the patients with palpitation (P group). The statistical results indicate that only the HHD (p value=0.010.05), THD (p value=0.220.05) and @a (p value=0.230.05) make no significant differences. The results imply that the spectral harmonic peaks for patient subjects exhibit more severe deviations in high-order harmonics along the exponential decay curve than those for normal subjects. In conclusion, this paper proposes a novel viewpoint to observe how the heart distributes blood into arterial system under normal and abnormal situations in spectral domain.