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Indication: Gastroesophageal reflux disease (GERD) with poor response to acid suppressive therapy, pre-operative assessment of anti-reflux surgery, non-cardiac chest pain

Procedure: The test studies the amount of acid reflux into the esophagus in 24 or 48 hours. Sedation will be given to the patient and a full diagnostic The Bravo capsule will be fixed to the esophagus with the help of endoscopy. The patient can be discharged after the procedure. The patient has to carry a wireless recorder during test (for 24 or 48 hours) and record the time of symptom onset, sleep and diet on a given diary. The patient will return the recorder and diary after 24 or 48 hours. The capsule will usually slough out spontaneously and passed out within 7-10 days. Compared to the traditional pH monitoring, Bravo wireless pH monitoring is more sensitive and better tolerated.