Limitations
Our study has the following limitations. First, a limited number of
cases included in the study were a main limitation. Thus, multi-centre
studies with large cohort of subjects are needed to confirm our study
results. The anohter limitation was that there were no patients
diagnosed with PoPH. Therefore, it is necessary to examine the
predictive value of PAS in cirrhotic patients with PoPH. Finally, the
average follow-up time of cirrhotic cases included in the study was
relatively short. Because this period was not sufficient to demonstrate
some transitions in the pulmonary vascular region, studies involving a
longer study cohort are necessary.