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Vol 7, No 4: Winter 2012:151-156 |
Exercise-based cardiac rehabilitation improves hemodynamic responses after coronary artery bypass graft surgery
Abstract
BACKGROUND: Cardiovascular disorders are an important public health problem worldwide.
They are also the leading cause of mortality and morbidity. Therefore, American Heart Association
proposed cardiac rehabilitation program as an essential part of care for cardiac patients to
improve functional capacity. The aim of this study was to evaluate the effectiveness of cardiac
rehabilitation program on functional status and some hemodynamic responses in patients after
coronary artery bypass graft (CABG) surgery.
METHODS: Thirty two patients were selected for this study. All patients underwent cardiac
surgery two months before admission. They were allocated to two groups. While the rehabilitation
group (n =17, mean age: 62 ± 12 years) completed the cardiac rehabilitation program for
two months, the reference group (n = 15, mean age: 58.5 ± 12.5 years) did not have any supervised
physical activity during this period. Cardiac rehabilitation program consisted of exercise,
nutritional, psychological consultation and risk factor management. At the beginning of the
study, functional capacity of patients was evaluated by exercise test, 6-minute walking test and
echocardiography. Functional capacity was evaluated for a second time after two months of cardiac
rehabilitation. Data were analyzed by SPSS15. For comparing the mean of outcomes, Mann-
Whitney test and Wilcoxon signed ranks test were used.
RESULTS: As a result of cardiac rehabilitation, a significant improvement was observed in the
distance walked in the rehabilitation group (P < 0.01) compared to the reference group
(P = 0.33). It also caused a significant development in hemodynamic responses to exercise such
as resting and maximum systolic and diastolic blood pressure, resting and maximum heart rate,
ejection fraction and rate pressure product.
CONCLUSION: Cardiac rehabilitation significantly improves functional capacity and some hemodynamic
responses post coronary artery bypass grafting. Therefore, patients need to be referred
to rehabilitation units.
Keywords: Cardiac Rehabilitation Program, Hemodynamic Responses, Coronary Artery Bypass Graft Surgery (CABG).
They are also the leading cause of mortality and morbidity. Therefore, American Heart Association
proposed cardiac rehabilitation program as an essential part of care for cardiac patients to
improve functional capacity. The aim of this study was to evaluate the effectiveness of cardiac
rehabilitation program on functional status and some hemodynamic responses in patients after
coronary artery bypass graft (CABG) surgery.
METHODS: Thirty two patients were selected for this study. All patients underwent cardiac
surgery two months before admission. They were allocated to two groups. While the rehabilitation
group (n =17, mean age: 62 ± 12 years) completed the cardiac rehabilitation program for
two months, the reference group (n = 15, mean age: 58.5 ± 12.5 years) did not have any supervised
physical activity during this period. Cardiac rehabilitation program consisted of exercise,
nutritional, psychological consultation and risk factor management. At the beginning of the
study, functional capacity of patients was evaluated by exercise test, 6-minute walking test and
echocardiography. Functional capacity was evaluated for a second time after two months of cardiac
rehabilitation. Data were analyzed by SPSS15. For comparing the mean of outcomes, Mann-
Whitney test and Wilcoxon signed ranks test were used.
RESULTS: As a result of cardiac rehabilitation, a significant improvement was observed in the
distance walked in the rehabilitation group (P < 0.01) compared to the reference group
(P = 0.33). It also caused a significant development in hemodynamic responses to exercise such
as resting and maximum systolic and diastolic blood pressure, resting and maximum heart rate,
ejection fraction and rate pressure product.
CONCLUSION: Cardiac rehabilitation significantly improves functional capacity and some hemodynamic
responses post coronary artery bypass grafting. Therefore, patients need to be referred
to rehabilitation units.
Keywords: Cardiac Rehabilitation Program, Hemodynamic Responses, Coronary Artery Bypass Graft Surgery (CABG).
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