The correlation in echocardiogram to right heart catheterization in identifying pulmonary hypertension as a barrier to liver transplantation

Pulmonary hypertension (PH) and portopulmonary hypertension (POPH) can be limitations towards listing for liver transplantation (LT). Our study evaluates the correlation of right ventricular systolic pressure (RVSP) and mean pulmonary artery pressure (mPAP) on transthoracic echocardiogram (TTE) compared to mPAP on right heart catheterization (RHC). We performed a retrospective review of 723 patients who underwent LT evaluation at our institution between 2012 and 2020. Our cohort consisted of patients with RVSP and mPAP measured on TTE. A Wald t-test and area under the curve analysis were used for statistical analyses. Patients with higher mPAP values on TTE (N=33) did not correlate with mPAP ≥ 35 mmHg on RHC, while patients with higher RVSP values (N=147) on TTE were associated with mPAP ≥ 35 mmHg on RHC. The cutoff value of RVSP ≥ 48 mmHg on TTE was associated with mPAP ≥ 35 mmHg on RHC. Our data suggest that RVSP compared to mPAP on TTE is a better indicator for mPAP ≥ 35 mmHg on RHC. RVSP can be used as a marker on echocardiography for identifying patients with a higher likelihood of PH being a barrier to LT listing.