Endoscopic grading of the gastroesophageal valve in patients with symptoms of gastroesophageal reflux disease (GERD)
BACKGROUND: It has been suggested that endoscopic grading of the gastroesophageal flap valve is a good predictor of the reflux status.METHODS: To test this hypothesis, 268 symptomatic patients underwent endoscopic grading of the gastroesophageal valve using Hill's classification, with grades I through IV. Esophageal acid exposure, lower esophageal sphincter characteristics, and the degree of esoph