Utility of EUS-elastography to Predict Portal Hypertension

The EUS-E quantitative evaluation will be performed on the left hepatic lobe transgastrically. For the SR calculation, the area A will be manually selected including as much of hepatic tissue as possible and the area B will be selected on the red gastric mucosa. For the strain histogram measurement, the ROI selected will have a surface of 60 mm2. The same procedure will be repeated 10 times at different points on the left hepatic lobe and finally the mean SR and SH values will be calculated. The same sequence will be repeated to measure the spleen stiffness. Finally the azygos vein (AV) will be evaluated using EUS Doppler. The mean velocity and the AV diameter will be measure and the AV blood flow volume index (BFVI) will be calculated.