We report a case of asymptomatic primary pulmonary hypertension associ
ated with liver cirrhosis (type B) and portal hypertension found by ch
ance during a preoperative Swan-Gantz catheterization study. Our exper
ience suggests that the actual prevalence of primary pulmonary hyperte
nsion associated with liver cirrhosis may be greater than that previou
sly reported. During the follow-up of liver cirrhosis with portal hype
rtension, we should consider primary pulmonary hypertension, even if t
he patient is free of symptoms, and a chest X-ray check may be necessa
ry.