Fontan hemodynamics in adults with obesity compared to overweight and normal body mass index: a retrospective invasive exercise study.

Aims: The effects of obesity on Fontan hemodynamics are poorly understood. Accordingly, we assessed its impact on exercise invasive hemodynamics and exercise capacity.

Methods: Seventy-seven adults post-Fontan undergoing exercise cardiac catheterization (supine cycle protocol) were retrospectively identified using an institutional database and categorized according to the presence of obesity (body mass index [BMI] >30 kg/m2) and overweight/normal BMI (BMI≤30 kg/m2).