Definition of GERD

Type	Clinical Features
Physiologic reflux	Postprandial symptoms Short-lived Asymptomatic Rarely during sleep
*Gastroesophageal reflux disease (GERD)*	Reflux of stomach contents into esophagus, oral cavity, or lung Contents with pH < 4.0 Causes symptoms and/or complications
Non-acid reflux	Reflux of gastric contents with pH > 4.0
Classification of GERD (based on appearance on EGD)	*Erosive esophagitis* Visible breaks in distal esophageal mucosa seen on endoscopy (EGD) with or without symptomatic GERD *Nonerosive reflux disease (endoscopy negative)* Significant GERD symptoms without visible injury on EGD

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Gastroesophageal Reflux Disease (GERD)