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The effect of t'ai chi exercise on autonomic nervous function of patients with coronary artery disease

Rei-Yeuh Chang1, Malcolm Koo, Zer-Ran Yu

  • 1Division of Cardiology, Department of Internal Medicine, Chia-Yi Christian Hospital, Chiayi, Taiwan. b722@cych.org.tw

Journal of Alternative and Complementary Medicine (New York, N.Y.)
|November 11, 2008
PubMed

Insights

T'ai chi (TC) practice improved heart rate variability (HRV) in coronary artery disease (CAD) patients after 9 months, suggesting enhanced vagal modulation. Long-term TC exercise may benefit CAD patients, warranting further research.

Area of Science:

  • Cardiology
  • Integrative Medicine
  • Autonomic Nervous System Function

Background:

  • Coronary artery disease (CAD) is a leading cause of mortality worldwide.
  • Heart rate variability (HRV) is a key indicator of autonomic nervous system function and cardiovascular health.
  • Non-pharmacological interventions are sought to improve outcomes in CAD patients.

Purpose of the Study:

  • To evaluate the effect of t'ai chi (TC) on heart rate variability (HRV) in patients with coronary artery disease (CAD).
  • To assess the acute and long-term impact of TC on HRV over a 9-month period.
  • To determine if TC practice influences autonomic modulation in CAD patients.

Main Methods:

  • A comparative trial involving 61 CAD patients undergoing intervention or surgery.
  • An experimental group practiced 90-minute Yang's style TC weekly for 9 months.
  • A control group maintained normal daily physical activity; HRV was measured at baseline and at 3, 6, and 9 months.

Main Results:

  • Significant changes in normalized low-frequency power and the low-/high-frequency power ratio were observed at 9 months post-TC compared to baseline.
  • The low-/high-frequency power ratio shifted from positive to negative values at 9 months, indicating altered autonomic balance.
  • No significant differences in resting HRV were found between TC and control groups in either time or frequency domains.

Conclusions:

  • TC exercise demonstrated potential to enhance vagal modulation in CAD patients, as evidenced by changes in HRV post-exercise.
  • Long-term regular TC practice may offer beneficial effects for individuals with coronary artery disease.
  • Further investigation is warranted to confirm the long-term benefits of TC in CAD management.
Abstract

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