Mean Right Atrial Pressure for Estimation of Left Ventricular Filling Pressure in Patients with Normal Left Ventricular Ejection Fraction: Invasive and Noninvasive Validation.

•Mean RAP provides useful information about mean PCWP in patients with normal LV EF.•RAP may be used to draw conclusions about PCWP if one of three variables is missing.•RAP may be an inaccurate measure of PCWP with predominant RV disease, severe TR, or MR.