Many physicians suggest repeating EVL every 1-2 weeks until esophageal varices are obliterated to prevent variceal rebleeding， however, the evidences supporting the efficacy of EVL intervals of 1-2 weeks are insufficient.This randomized controlled study was conducted in order to compare the long-term results of EVL when performed at two different results from monthly and bi-weekly treatments.

Endoscopic variceal ligation (EVL) is a safe and simple procedure now being used on a widening scale. A lot of patients who undergo endoscopic treatment for esophageal varices eventually require additional treatment for recurrent varices. Many physicians suggest repeating EVL every 1-2 weeks until esophageal varices are obliterated to prevent variceal rebleeding， however, the evidences supporting the efficacy of EVL intervals of 1-2 weeks are insufficient.This randomized controlled study was conducted in order to compare the long-term results of EVL when performed at two different results from monthly and bi-weekly treatments.

Inclusion Criteria:

1. acute or recent bleeding from esophageal varices;
2. portal hypertension caused by cirrhosis;
3. age between 18 and 80 yr.

Exclusion Criteria:

1. history of endoscopic, pharmacological, interventional or surgical treatment of esophageal varices;
2. presence of liver failure with a serum total bilirubin concentration greater than 3 mg/dL;
3. presence of hepatocellular carcinoma or other malignancy;
4. an association with a cerebral vascular accident, uremia, acute coronary syndrome, or other severe illness;
5. history of gastric variceal bleeding;
6. encephalopathy of stage II or worse;
7. failure to control initial variceal bleeding;
8. death within 48 h of admission;
9. refusal to participate in the trial.