BACKGROUND: Cardiovascular diseases are the most frequent complications associated with obesity. The weight loss determine blood pressure decrease and improvement in parameters of lipid and glucose levels. Weight loss and maintenance reduce the risk factors for cardiovascular disease, making reversible cardiac changes resulting from obesity. AIM: To evaluate the effect of weight loss on physical capacity and the structural and functional heart of obese patients undergoing to bariatric surgery. METHODS: Forty-three patients who underwent gastric Roux-en-Y bypass, were analyzed by ECG, and echocardiography preoperatively and one year after the bypass. Statistical analysis used the Wilcoxon and Student t test, Shapiro-Wilk test with a significance level of 5%. RESULTS: The weight decreased from 116.5 kg to 21.5 ± 15.9 ± 80 kg, BMI of 41.8 kg/m 2 ± 4.4 to 28.4 kg/m 2 ± 3.8, heart rate decreased from 77.9 ± 9.6 bpm to 70.9 ± 7.8 bpm, systolic pressure of 130 ± 20 mmHg to 120 mmHg ± 10, diastolic 80 mmHg ± 10 mmHg to 80 ± 0. The exercise test showed increases in distance traveled of 378.9 m ± 126.5 m to 140.4 ± 595m; coefficient in metabolic equivalents (METs) from 6.7 ± 2.4 ml O 2 / kg / min to 8.3 ± 2.6 ml O 2 / kg / min, oxygen consumption (VO 2) 23.1 ± 8.4 to 10.3 ± 30. The echocardiogram showed a reduction in the interventricular septum of 12 mm to 10 mm ± 2 ± 1; posterior wall of 11 mm to 10 mm ± 2 ± 1; ventricular mass of 273 ± 85 g to 216g ± 60. There was improvement in diastolic function with increase in E '/ A'e E / A and ejection fraction with an increase of 70.2% ± 7.2 to 72.9 ± 6.4%. CONCLUSION: Obese patients undergoing bariatric surgery showed improvement in physical capacity and in the structure/functioning of the heart.
Obesity; Bariatric surgery; Ergometry; Echocardiography
