PVR

ECHONOMY Tools for Echocardiographic Calculations Muhamed Saric, MD, PhD New York University

Scope
To provide overview of common noninvasive estimates of pulmonary vascular resistance (PVR).
Methods
ARRITHMETIC METHOD
PVR = (MPAP - PAWP) / CO MPAP, mean pulmonary artery pressure; PAWP, pulmonary artery wedge pressure; CO, cardiac output.	Ohm's law applied to hemodynamics

ABBAS METHOD
*PVR = 10 {Vmax of TR / VTI_RVOT} + 0.16** Vmax of TR in m/sec; VTI_RVOT in cm; PVR in Wood units.	J Am Coll Cardiol 2003;41:1021-7.

HADDAD METHOD
*PVRI = 1.97 + 190.71 PASP / (HR * VTI_RVOT)** PVRI, pulmonary vascular resistance (in WU/m²), PASP, pulmonary artery systolic pressure (in mm Hg); HR, heart rate (in beats per minute); VTI_RVOT (in cm).	J Am Soc Echocardiogr 2009;22:523-529.

Scope