Upper gastrointestinal endoscopy is a very commonly performed procedure used as a diagnostic tool to evaluate patients with a wide range of problems and complaints. Major complications related to diagnostic and therapeutic procedures can be divided into cardiopulmonary complications, complications related to sedation, infectious complications, perforation and bleeding. Knowledge of potential complications and their expected frequency together with adequate monitoring of the patient can lead to their early recognition. Early recognition of complications and prompt intervention may minimize patient morbidity.

        Key words: gastroscopy, complications