Features of cardiopulmonary reserve in patients with chronic thromboembolic pulmonary hypertension with concomitant rhythm disturbances

Aim. To study the characteristics of cardiopulmonary reserve in patients with chronic thromboembolic pulmonary hypertension (CTEPH) with concomitant atrial fibrillation (AF) and to evaluate the relationship between the level of peak oxygen consumption (V´О₂ peak) and the course of the hospital period after pulmonary endarterectomyMaterial and methods. A total of 124 male patients with CTEPH aged 52.8 (43.2-64.1) years were examined. 1st group (29 people) included patients with concomitant AF, and 2nd group (95 people) included patients without AF. Before surgery, patients underwent a cardiopulmonary exercise test (CPET).Results. According to the CPET data, in the 1st group the values of V´О₂ peak, V´О₂ peak at the anaerobic threshold, V´О₂/HR peak, threshold power and duration of physical activity (PA) were lower in comparison with the 2nd (p