Prevention of first variceal bleed: an appraisal of current therapies.
Primary prophylaxis of esophageal variceal hemorrhage (EVH) is an important issue in the management of patients with portal hypertension. Given the high rates of initial variceal hemorrhage and mortality in patients who have not experienced bleeding from varices, there is an urgent need for some form of primary prophylaxis in all patients with large esophageal varices. The aim of this article is to review the various therapies that have been clinically assessed in randomized controlled trials for their efficacy in prevention of initial EVH. Beta-blockers have been found to be useful in primary prophylaxis of EVH, and the consensus at present is that they should be offered to all patients with portal hypertension who are at high risk for EVH. Nitrates and other newer agents are under evaluation. Surgery is not recommended for primary prophylaxis of EVH. Endoscopic sclerotherapy has not been shown unequivocally to be efficacious, and may even be deleterious, possibly related to an unacceptably high complication rate in this clinical setting. However, it may merit further clinical evaluation in light of recent reports of benefit in certain subgroups of patients with portal hypertension. On the other hand, endoscopic variceal ligation, which has an inherently low complication rate and brings about rapid obliteration of varices, may be a better option for primary prophylaxis of EVH. In the future, preprimary prophylaxis, an attractive concept, may be considered. This would involve intervention with pharmacologic agents even before the development of portal hypertension or esophageal varices.