To the Editors:
The hepatopulmonary syndrome (HPS) is defined by the triad of chronic liver disease, abnormal pulmonary gas exchange (low arterial oxygen tension (Pa,O2) and transfer factor of the lung for carbon monoxide), and intrapulmonary vascular dilatation 1. The recent editorial on HPS 2 suggests that “hunting endogenous vasodilators that reduce pulmonary vascular tone logically became a sound strategy …