Measures of right heart function

Parameter	Optimal value
Mean right atrial pressure (RAP)	<15 mmHg
RAP/PCWP ratio	<0.6
Pulmonary vascular resistance	<4 Wood units
Transpulmonary gradient (TPG)	<15 mmHg
Right ventricular ejection fraction (RVEF)	>30 percent
Right ventricular stroke work index (RVSWI)	>250 mmHg x mL/m²
Tricuspid annular plane systolic excursion (TAPSE)	>0.75 cm

TPG = (Mean pulmonary artery pressure) - (PCWP).

PCWP: pulmonary capillary wedge pressure.

Courtesy of Donna Mancini, MD.

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