Figure 1
From: Echocardiographic assessment of pulmonary vascular resistance in pulmonary arterial hypertension
Linear regression analysis showing correlation between PVR by catheterization in Wood units (WU) and ratios TRV/TVI rvot (Panel A) and TRV/TVI lvot (Panel B) obtained by echocardiography. PVR = Pulmonary vascular resistance; TRV/TVI lvot = Peak tricuspid regurgitant velocity/Left ventricular outflow tract time-velocity integral; TRV/TVI rvot = Peak tricuspid regurgitant velocity/Right ventricular outflow tract time-velocity integral; WU = Wood units.