Variation Analysis of Sphygmogram to Assess Cardiovascular System under Meditation

Author:

Liu Chuan-Yi1,Wei Ching-Chuan2,Lo Pei-Chen13

Affiliation:

1. Institute of Electrical and Control Engineering, National Chiao Tung University, Taiwan

2. Department of Computer and Communication Engineering, Asia University, National Chiao Tung University, Taiwan

3. Department of Electrical and Control Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 30010, Taiwan

Abstract

In this article, we studied how meditation affects the characteristics of the cardiovascular system, mainly based on blood pressure waveforms (BPW). Four parameters derived from BPW include the rising slope (h1/t1), normalized height of T wave (h3/h1), normalized height ofV3valley (h4/h1) and normalized height of D wave (h5/h1), wheret1andhi,i= 1, … ,5 are quantitative features of the BPW waveform pattern. A larger value ofh1/t1reflects better heart ejection ability and aorta compliance. A larger value ofh3/h1may infer an arterial system with good elasticity. The decrease (increase) ofh4/h1parameter indicates the decrease (increase) of peripheral resistance of vessels. A larger value ofh5/h1indicates better artery elasticity and aortic valve function. In comparison with the control group, Zen-meditation practitioners have more after-meditationh1/t1,h3/h1andh5/h1increase, with moreh4/h1decrease, with statistical significance (P< 0.05). The observation allows us to infer that Zen meditation may effectively improve relevant characteristics of the cardiovascular system.

Funder

National Science Council

Publisher

Hindawi Limited

Subject

Complementary and alternative medicine

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