Defining end-systolic pressure for single-beat estimation of right ventricle–pulmonary artery coupling: simple… but not really

Correlation between measured right ventricle end-systolic pressure (RV ESP) and estimated RV ESP using different single beat methods. Data presented as means and 95% confidence intervals of the linear regression functions. Red line denotes the line of identity (left-hand panels). Bland–Altman plot showing the mean difference between methods (bias) and 95% limits of agreement (LOA) and their respective confidence intervals between estimated and measured RV ESP (right-hand panels). mPAP: mean pulmonary arterial pressure; RVSP: right ventricle systolic pressure.