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The effect of cardiac rehabilitation on recovery of heart rate over one minute after exercise in patients with coronary artery bypass graft surgery

Department of Physical Medicine and Rehabilitation, Taichung Veterans General Hospital, Taichung and Department of Physical Therapy, HungKuang University, Taichung County, Tainan, Taiwan

Yi-Wen Lin

Department of Internal Medicine, Chung-Shan Medical University Hospital, Taichung, Tainan, Taiwan

Shyi-Kuen Wu

Department of Physical Therapy, HungKuang University, Taichung County and Institute of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan

Objective: To evaluate the effects of cardiac rehabilitation on the recovery of heart rate over 1 min after peak exercise of patients who received coronary artery bypass graft (CABG) surgery.

Design: Thirty subjects who received CABG surgery were randomly assigned to enter or not enter a cardiac rehabilitation exercise programme (cardiac rehabilitation n=15; control group n=15).

Setting: Outpatient cardiac rehabilitation centre in a national medical hospital.

Interventions: Patients assigned to the cardiac rehabilitation group received 36 sessions of the exercise programme, three times a week, with the intensity designed to achieve an individual 60-85% peak heart rate in cardiopulmonary exercise test. Patients assigned to the control group did not get further advice about a specific exercise programme.

Main outcome measures: Resting heart rate and recovery of heart rate over 1 min after a peak exercise test at discharge and three months later were collected. The heart rates were analysed with computer-recorded electrocardiogram.

Results: At follow-up, the 15 patients in the cardiac rehabilitation group had a significantly lower resting heart rate (77.469± 9.49 versus 92.319± 10.18 bpm; p B± 0.001) and a significantly higher recovery of heart rate over 1 min (16.389± 6.32 versus 11.389± 4.81 bpm; p ± 0.03) compared with the control group. There were also significant reductions in resting heart rates (cardiac rehabilitation p ± 0.001; control p=0.05) and improvements in recovery on heart rate over 1 min (cardiac rehabilitation p ± 0.001; control p= 0.001) compared with baseline measurements in both the cardiac rehabilitation and control groups.

Conclusion: Cardiac rehabilitation had a positive effect on the improvement of recovery on heart rate over 1 min in patients with coronary artery disease who received CABG surgery.

Clinical Rehabilitation, Vol. 19, No. 8, 843-849 (2005)
DOI: 10.1191/0269215505cr915oa


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