Hemodynamic Effects of Weight Loss in Obesity: A Systematic Review and Meta-Analysis

The authors aimed to explore whether weight loss may improve central hemodynamics in obesity. Hemodynamic abnormalities in obese heart failure with preserved ejection fraction patients are correlated with the amount of excess body mass, suggesting a possible causal relationship. Relevant databases were systematically searched from inception to May 2018, without language restriction. Studies reporting invasive hemodynamic measures before and following therapeutic weight loss interventions in patients with obesity but no clinically overt heart failure were extracted. A total of 9 studies were identified, providing data for 110 patients. Six studies tested dietary intervention and 3 studies tested bariatric surgery. Over a median duration of 9.7 months (range 0.75 to 23.0 months), a median weight loss of 43 kg (range 10 to 58 kg) was associated with significant reductions in heart rate (-9 beats/min, 95% confidence interval [CI]: -12 to -6; p