Combination of EVL and β-blocker has been proven effective in the prevention of variceal rebleeding . However, Our previous study showed that combination of EVL and nadolol do not have enhanced effect in the prophylaxis of 1st variceal bleeding as compared with nadolol alone . One of the drawbacks of EVL is esophageal ulcer. On the other hand ,carvedilol, an anti-α beta-blocker, has been proven to be more effective than propranolol in the reduction of portal pressure. Carvedilol has been proven to be more effective than EVL in the prevention of 1st variceal bleeding. The investigators thus conduct a multicenter trial to evaluate whether combination of EVL and carvedilol could be more effective than carvedilol alone in the prophylaxis of 1st esophageal variceal bleeding . The goal of patients receiving EVL is to reduce variceal size, not variceal obliteration, in anticipation for fewer sessions required for each patient and fewer possibility of esophageal ulcer bleeding.