Abstract 17357: Morbid Obesity Predicts Smaller Improvements in Exercise Capacity but Greater Weight Loss after Bypass Surgery with Cardiac Rehabilitation
Background: The number of morbidly obese patients (BMI>35) undergoing coronary artery bypass surgery (CABG) is increasing. Although some studies suggest that such patients may have a better prognosis in the immediate postoperative period, data on outcomes in this population following cardiac rehabilitation (CR) are sparse.
Hypothesis: We predicted that morbidly obese patients after CABG would have worse outcomes with CR than those with a lower BMI.
Methods: A total of 365 patients (78 females, 297 males, mean age 64.5 ± 10.1 years) after CABG were enrolled in a 12 week CR program. Overall, mean weight was 190 ± 37 pounds and mean BMI was 28 ± 5. Two hundred forty three patients were normal weight or overweight (BMI <30), eighty-six patients were obese (BMI 30-35), and thirty-six patients were morbidly obese (BMI >35). Exercise capacity in metabolic equivalents (METs) and risk factors were measured before and after CR and compared between groups using Student’s t-testing.
Results: METs improved significantly in all patients but less in morbidly obese patients (see Table). Despite this lower degree of improvement in exercise capacity, morbidly obese patients achieved a significantly greater weight loss during CR than the other weight categories. LDL cholesterol, but not HDL or blood pressure, improved in morbidly obese patients.
Conclusion: Despite lack of improvement in HDL or blood pressure, morbidly obese patients after CABG should still be referred to CR as they achieve increased exercise capacity and paradoxically greater weight loss.
Author Disclosures: P. Gomadam: None. M. Sacrinty: None. C. Douglas: None. D. Johnson: None. T. Addison: None. B. Martin: None. C. Paladenech: None. N. Austin: None. K. Robinson: None.
- © 2014 by American Heart Association, Inc.