Objective: Aminoterminal pro-brain natriuretic peptide (NT-proBNP), like brain natriuretic peptide, might have diagnostic utility in detecting left ventricular hypertrophy and/or left ventricular dysfunction. The aim of the study was to investigate the relationship between morbid obesity and NT-proBNP and the effect of weight reduction on this parameter.
Research Methods And Procedures: A total of 34 morbidly obese patients underwent laparoscopic adjustable gastric banding (LAGB). NT-proBNP levels were measured before and 12 months after the surgery.
Results: Metabolic features and systolic and diastolic blood pressure were significantly decreased (p < 0.00001 for both) after a cumulative weight loss of 19.55 kg 1 year after LAGB. NT-proBNP concentration was significantly higher in morbidly obese patients before LAGB than in normal-weight control subjects (341.15 +/- 127.78 fmol/mL vs. 161.68 +/- 75.78 fmol/mL; p < 0.00001). After bariatric surgery, NT-proBNP concentration decreased significantly from 341.15 +/- 127.78 fmol/mL to 204.87 +/- 59.84 fmol/mL (p < 0.00001) and remained statistically significantly elevated (204.88 +/- 59.84 fmol/mL vs. 161.68 +/- 75.78 fmol/mL; p = 0.04) compared with normal-weight subjects.
Discussion: This investigation demonstrates higher levels of NT-proBNP in morbidly obese subjects and a significant decrease during weight loss after laparoscopic adjustable gastric banding. In obesity, NT-proBNP might be useful as a routine screening method for identifying left ventricular hypertrophy and/or left ventricular dysfunction.
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