Multiparametric vs. Inferior Vena Cava–Based Estimation of Right Atrial Pressure

Background: Right atrial pressure (RAP) can be estimated by echocardiography from inferior vena cava diameter and collapsibility (eRAPIVC), tricuspid E/e′ ratio (eRAPE/e′), or hepatic vein flow (eRAPHV). The mean of these estimates (eRAPmean) might be more accurate than single assessments.Methods and Results: eRAPIVC, eRAPE/e′, eRAPHV (categorized in 5, 10, 15, or 20 mmHg), eRAPmean (continuous values) and invasive RAP (iRAP) were obtained in 43 consecutive patients undergoing right heart catheterization [median age 69 (58–75) years, 49% males]. There was a positive correlation between eRAPmean and iRAP (Spearman test r = 0.66, P < 0.001), with Bland–Altman test showing the best agreement for values