The goal of this study is to demonstrate the HQ-SHUNT is safe, simple to administer, noninvasive, cost-effective, and well tolerated by patients. This study will compare the HQ-SHUNT to Hepatic Venous Pressure Gradient (HVPG) testing. In this study, 100 consecutive patients with various etiologies of liver disease who have undergone technically successful HVPG testing as standard of care will also undergo HQ-SHUNT testing.
