Add to ORKGassociated 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 ± ...