Figure 2. Graph displaying several linear correlations between the echocardiographic (echo) peak right ventricular outflow tract (RVOT) gradient and cardiovascular magnetic resonance measures of biventricular dimensions and function as well as results from cardiopulmonary exercise testing.
Higher RVOT gradients were significantly associated with smaller right ventricular end‐diastolic volumes (RVEDVI) and less pulmonary regurgitation (PR) but were also related with reduced global right ventricular (RV) and left ventricular (LV) longitudinal systolic (strain) and diastolic (strain rate) deformation. No significant correlation was observed between peak RVOT gradient and exercise capacity (peak oxygen uptake [VO2] and percentage predicted). EDSR indicates early diastolic strain rate; EF, ejection fraction; LS, longitudinal strain; and VAT, ventilator anaerobic threshold.