EUS-guided Portal Pressure Gradient (PPG) Measurement: a Potential Alternative to the Traditional HVPG

The goal of this investigator-initiated, single-arm, prospective study is to evaluate the accuracy, safety, and feasibility of endoscopic ultrasound-guided portal pressure gradient (EUS-PPG) measurement as a potential alternative to the traditional hepatic venous pressure gradient (HVPG) method in patients with portal hypertension due to chronic liver disease. The main questions it aims to answer are: * What is the correlation between EUS-PPG and HVPG measurements in patients with portal hypertension due to cirrhosis? * Can EUS-PPG serve as a reliable and less invasive alternative to HVPG for assessing portal pressure? * What are the safety outcomes associated with EUS-PPG compared to HVPG? Researchers will compare EUS-PPG measurements with HVPG measurements within the same patients to assess whether EUS-PPG provides accurate and clinically comparable portal pressure readings while reducing procedural risks. Participants will: * Be adults aged 18 to 85 with a history of liver disease and portal hypertension or suspected cirrhosis requiring HVPG measurement. * Undergo both EUS-PPG and HVPG measurements within a seven-day window to allow for direct comparison of results. * Receive standard clinical care for their condition, including routine diagnostic evaluations and portal hypertension management as needed. * Be monitored for safety outcomes, including adverse events such as bleeding, infection, perforation, and any other complications related to the procedure. * Provide relevant demographic and clinical data, including liver disease history, Child-Pugh and MELD scores, and portal hypertension-related complications such as varices or ascites.