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Table 2 Correlation of cardiac output (CO) and pulmonary vascular resistance (PVR) as determined by right heart catheterization (RHC) and established methods of echocardiographic determination[4, 5, 8]

From: Estimation of cardiac output and pulmonary vascular resistance by contrast echocardiography transit time measurement: a prospective pilot study

Method of calculation RHC measured Mean ± SD ECHO calculated Mean ± SD Correlation P value
CO-Huntsman (L/min) 6.17 ± 1.37 4.34 ± 1.47 0.152 0.204
PVR-Abbas (TRV/RVOT × 10) Wood Units 1.44 ± 1.07 1.59 ± 0.71 0.182 0.181
PVR-Haddad (SPAP/(RVOT VTI×HR)) Wood Units/m 2 0.72 ± 0.52 0.26 ± 0.15 0.158 0.216