Assessment of Right Ventricular-Pulmonary Arterial Coupling in Chronic Pulmonary Regurgitation

Background We hypothesized that noninvasively measured right ventricular (RV) to pulmonary arterial (RV-PA) coupling would be abnormal in chronic pulmonary regurgitation (PR) even in the setting of normal RV ejection fraction, and that RV-PA coupling indices would have a better correlation with peak oxygen consumption (VO2) compared with RV systolic indices alone. Methods This was a retrospective study of 129 adults (repaired tetralogy of Fallot...