Significant Changes in Blood Pressure, Glucose, and Lipids with Gastric Bypass Surgery

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Abstract
The morbidly obese have a disproportionately greater risk of hypertension, diabetes, and coronary artery disease than their lean or less seriously obese counterparts. Roux-en-Y gastric bypass surgery has been found to be highly effective in inducing, and sustaining, weight loss in individuals with morbid obesity. The purpose of the present study was to examine the effects of weight loss with Roux-en-Y gastric bypass surgery (GBP) on blood pressure, fasting blood glucose, and the lipid/lipoprotein status of 61 morbidly obese women and 21 men. Anthropometric and blood pressure assessments and blood samples for glucose and lipid/lipoprotein analyses were obtained before surgery and at 6 to 12 months postoperatively. By this time, morbidly obese (MO) males and females had lost 33% and 30% of their initial body weight, respectively, along with significant reductions in fasting blood glucose ( p < 0.01) and systemic blood pressure ( p < 0.05). Weight loss with GBP was also associated with significant reductions in the apoprotein B-containing lipoproteins and the triglyceride and cholesterol composition of these particles. There was a trend ( p < 0.10) toward increased serum levels of high density lipoprotein (HDL)-cholesterol following GBP, and significant ( p < 0.05) improvement in HDL subfraction distribution and composition. These findings demonstrate the effectiveness of GBP in inducing metabolic changes in the MO population, which may reduce the risk of coronary artery disease, diabetes, and hypertension.

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