Background: Coronary artery bypass grafting a frequent surgical procedure to treat coronary heart disease, uses the patient's own veins or arteries to bypass narrowed areas and restore blood flow to heart muscle. Cardiac rehabilitation follows this procedure and includes psychological and nutritional support along with the regular practice of physical exercises.
Objective: The aim of this study was to investigate the acute effects of the aerobic exercise on the blood pressure of patients after coronary artery bypass grafting.
Methods: After 30 days of surgical procedure, 14 patients were assigned to the aerobic exercise group (exercise on the cycle ergometer for 35 minutes), while 8 patients were assigned to the control group (absolute rest for 35 minutes). Blood pressure was measured by a digital automatic device before and after 24 hours of the experiment in both groups.
Results: Systolic (P = 0.639) and diastolic (P = 0.103) blood pressures were similar between CG and AEG at baseline. Regarding intragroup differences, no significant changes were observed after 24 hours for SBP in the CG (P = 0.999) and AEG (P = 0.244). On the other hand, significant changes were found for DBP after 24 hours for the CG (P = 0.007) and AEG (P = 0.015). When CG and AEG were compared after 24 hours, no significant differences were found for SBP (P = 0.999) and DBP (P = 0.054).
Conclusions: We found decreased diastolic blood pressure in the aerobic exercise group when the results for pre-training and post-training were compared. However, to support our findings further research is needed, preferably using randomized controlled trials.
Keywords: Cardiovascular surgical procedures; arterial pressure; exercise; prevention and control; rehabilitation.