Differences in right ventricular morphology, not function, indicate the nature of increased afterload in pulmonary hypertensive subjects with normal left ventricular function

100 patients with pulmonary hypertension (PH) and normal left ventricular function, divided into PH from pulmonary vascular disease (n=34), pulmonary venous hypertension (n=33), and mixed PH (n=33). Mean age 62 ± 14.4 years, 69% female, 57% Caucasian.

2D echocardiographic measurement of systolic right ventricular base/apex ratio (sRV b/a)

Prediction of pulmonary vascular resistance (PVR) > 3 Wood units and discrimination between pulmonary venous hypertension and pulmonary vascular diseasesurrogate