What question did this study set out to answer?

The aim is to investigate the early impact of bariatric surgery on reversing heart dysfunction associated with obesity.

January 10, 2026Obesity Surgery0 citationsOpen Access

Early Effects of Bariatric Surgery on Reversing Obesity-Induced Heart Dysfunction

PCPatrycja CechaJan Kochanowski University APAnna PolewczykElectrophysiology MMMateusz MarzecJagiellonian University

Key Points

The aim is to investigate the early impact of bariatric surgery on reversing heart dysfunction associated with obesity.
Conducted a clinical assessment of cardiac function pre- and post-bariatric surgery

Structured PICO

Does bariatric surgery improve echocardiographic parameters of left and right ventricular and left atrial function in patients with severe obesity?

Population

39 adult patients with severe obesity (BMI > 35 kg/m2) undergoing bariatric surgery, mean age 42.3 years, 82.05% women, based in Poland. Exclusions: pregnancy, postpartum period, alcohol dependence, and cancer.

Intervention

Bariatric surgery (87.18% sleeve gastrectomy, 7.69% balloon, 2.56% mini-gastric bypass, 2.56% single anastomosis sleeve ileal bypass)

Outcome

Echocardiographic parameters assessing the function of the left atrium (LA) and the left (LV) and right ventricle (RV) at 3 and 6 months postoperativelysurrogate

Bariatric surgery induces rapid and significant improvements in subclinical echocardiographic markers of left atrial, left ventricular, and right ventricular function within 6 months.

Abstract

Severe obesity causes hemodynamic changes in the circulatory system and may lead to heart failure. Weight loss achieved with bariatric surgery can reverse many of the hemodynamic and structural abnormalities caused by obesity. In 39 consecutive patients undergoing bariatric surgery, echocardiographic examinations were performed before surgery and 3 and 6 months after surgery. Detailed echocardiographic parameters assessing the function of the left atrium (LA) and the left (LV) and right ventricle (RV) were analyzed. The study population consisted of 76% women with mean body mass index (BMI) of 40.3 kg/m2 and mean age of 42.4 years. At 3- and 6-month follow-up after bariatric surgery there was a reduction in LV mass (109.7 vs. 99.1 vs. 87.4 kg/m2; p < 0.001), LV end diastolic volume (47.1 vs. 30.0 vs. 43.7; p < 0.001) and stroke volume (29.7 vs. 24.3 vs. 26.3; p = 0.05). Simultaneously an improvement in global longituginal strain (-14.38 vs. -16.79 vs. -18.01) and an increase in LA strain parameters (reservoir : 22.5 vs. 28.0 vs. 31.1; p < 0.001 and conduit: -12.8 vs. -16.5 vs. -19.6) were observed. Comparison of RV parameters before and after bariatric surgery showed improvement in global strain of RV (-15.9 vs. -18.8 vs. -18.38%; p = 0.005), free wall strain (-18.38 vs. -19.70 vs. -19.50; p = 0.042) and reduction in tricuspid regurgitation velocity (1.84 vs. 1.67 vs. 1.46±0.52; p = 0.01). Weight loss contributes to rapid improvement in LA, LV and RV function. New echocardiographic parameters earlier detect subclinical hemodynamic changes associated with obesity and weight loss after bariatric surgery. Obesity contributes to heart dysfunction detected by echocardiography. New echocardiographic techniques enable early detection of deterioration of left atrial, left and right ventricular function in obese patients. Weight loss after bariatric surgery results in rapid improvement in left atrial, left and right ventricular function.

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