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Impact of cardiac rehabilitation exercise program on left ventricular diastolic function in coronary artery disease:

Punsak Wuthiwaropas1, Diego Bellavia, Mohamed Omer

  • 1Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.

The International Journal of Cardiovascular Imaging
|November 20, 2012
PubMed

Insights

Exercise-based cardiac rehabilitation (CR) improved diastolic function in 50% of coronary artery disease (CAD) patients. This 3-month program showed significant benefits for left ventricular diastolic function, warranting further investigation.

Area of Science:

  • Cardiology
  • Cardiovascular Rehabilitation

Background:

  • Diastolic dysfunction is prevalent in coronary artery disease (CAD).
  • Exercise-based cardiac rehabilitation (CR) is known to improve survival and quality of life in CAD patients.
  • The specific impact of CR on diastolic function remains incompletely understood.

Purpose of the Study:

  • To investigate the effect of a 3-month outpatient exercise-based cardiac rehabilitation program on left ventricular diastolic function in patients with coronary artery disease.

Main Methods:

  • A prospective study involving 25 CAD patients undergoing 3-month outpatient CR.
  • Echocardiograms were performed before and after the CR program.
  • Key parameters assessed included ejection fraction, regional wall motion score index, E/e' ratio, left atrial volume index, and peak untwisting rate.

Main Results:

  • Left ventricular diastolic dysfunction was present in 88% of patients at baseline.
  • Following CR, 50% of patients demonstrated improved diastolic function.
  • Significant improvements were observed in the E/e' ratio (P=.048) post-CR.
  • Patients with improved diastolic function showed greater reductions in left atrial volume index (P=.04) and increases in peak untwisting rate (P=.003).

Conclusions:

  • A 3-month exercise-based cardiac rehabilitation program can lead to improvements in left ventricular diastolic function in approximately half of patients with coronary artery disease.
  • Further large-scale studies are necessary to fully elucidate the role of CR in managing diastolic dysfunction in CAD.
  • CR may offer a beneficial intervention for improving diastolic mechanics in this patient population.

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