Echocardiographic correlates of pressure-volume-derived indices: Advancing intraoperative assessment of right ventricular function

Objectives: To evaluate the relationship between intraoperative 3-dimensional (3D) echocardiographic measures of right ventricular (RV) function and invasively derived RV-pulmonary arterial (RV-PA) coupling metrics obtained from single-beat end-systolic pressure-volume analysis, identify echocardiographic surrogates capable of discriminating impaired RV-PA coupling during cardiac surgery. Methods: single-beat method. Patients were stratified by coupling status using an Ees/Ea cutoff of 0.8. Relationships between echocardiographic variables and coupling metrics were analyzed using Spearman correlation, receiver operating characteristic analysis, and multivariable logistic regression adjusted for Society of Thoracic Surgeons risk score and perfusion time. Results: < .001) and significant discriminative performance (area under the curve = 0.94; optimal cutoff