Variation Analysis of Sphygmogram to Assess Cardiovascular System under Meditation

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 of V3 valley (h4/h1) and normalized height of D wave (h5/h1), where t1 and hi, i = 1, … ,5 are quantitative features of the BPW waveform pattern. A larger value of h1/t1 reflects better heart ejection ability and aorta compliance. A larger value of h3/h1 may infer an arterial system with good elasticity. The decrease (increase) of h4/h1 parameter indicates the decrease (increase) of peripheral resistance of vessels. A larger value of h5/h1 indicates better artery elasticity and aortic valve function. In comparison with the control group, Zen-meditation practitioners have more after-meditation h1/t1, h3/h1 and h5/h1 increase, with more h4/h1 decrease, with statistical significance (P < 0.05). The observation allows us to infer that Zen meditation may effectively improve relevant characteristics of the cardiovascular system.

[1]  J. Cohn,et al.  Noninvasive pulse wave analysis for the early detection of vascular disease. , 1995, Hypertension.

[2]  D. Webb,et al.  Pulse wave analysis and arterial stiffness. , 1998, Journal of cardiovascular pharmacology.

[3]  D. Orme-Johnson,et al.  Physiological differences between transcendental meditation and rest. , 1987 .

[4]  Kirsten Tillisch,et al.  Functional Somatic Syndromes: Emerging Biomedical Models and Traditional Chinese Medicine , 2004, Evidence-based complementary and alternative medicine : eCAM.

[5]  A W Khir,et al.  Measurements of wave speed and reflected waves in elastic tubes and bifurcations. , 2002, Journal of biomechanics.

[6]  Alex Hankey,et al.  Studies of Advanced Stages of Meditation in the Tibetan Buddhist and Vedic Traditions. I: A Comparison of General Changes , 2006, Evidence-based complementary and alternative medicine : eCAM.

[7]  R. Schneider,et al.  A Randomized Controlled Trial of Stress Reduction for Hypertension in Older African Americans , 1995 .

[8]  J. Cohn,et al.  Age-related abnormalities in arterial compliance identified by pressure pulse contour analysis: aging and arterial compliance. , 1999, Hypertension.

[9]  F. Treiber,et al.  Acute effects of transcendental meditation on hemodynamic functioning in middle-aged adults. , 1999, Psychosomatic medicine.

[10]  M. O'Rourke,et al.  Pulse wave analysis. , 1996, Journal of hypertension. Supplement : official journal of the International Society of Hypertension.

[11]  H. Myers,et al.  Effects of stress reduction on carotid atherosclerosis in hypertensive African Americans. , 2000, Stroke.

[12]  V. Barnes,et al.  Impact of Meditation on Resting and Ambulatory Blood Pressure and Heart Rate in Youth , 2004, Psychosomatic medicine.

[13]  B. Egan,et al.  Trial of stress reduction for hypertension in older African Americans. II. Sex and risk subgroup analysis. , 1996, Hypertension.

[14]  L. Boxt.  McDonald's blood flow in arteries , 1991, CardioVascular and Interventional Radiology.