Gastroesophageal Reflux Disease

Abstract

Gastroesophageal reflux disease (GERD) is a chronic gastrointestinal disorder characterized by the regurgitation of gastric contents into the esophagus. It is one of the most commonly diagnosed digestive disorders in the US with a prevalence of 20%, resulting in a significant economic burden in direct and indirect costs and adversely affects the quality of life. GERD is caused by multiple different mechanisms that can be intrinsic, structural, or both, leading to the disruption of the esophagogastric junction barrier resulting in exposure of the esophagus to acidic gastric contents. Clinically, GERD typically manifests with symptoms of heartburn and regurgitation. It can also present in an atypical fashion with extra-esophageal symptoms such as chest pain, dental erosions, chronic cough, laryngitis, or asthma. Based on endoscopic and histopathologic appearance, GERD is classified into three different phenotypes: non-erosive reflux disease (NERD), erosive esophagitis (EE), and Barrett esophagus (BE). NERD is the most prevalent phenotype seen in 60-70% of patients followed by erosive esophagitis and BE seen in 30% and 6-12% of patients with GERD, respectively. . Over the years, the mainstay in the management of GERD has been lifestyle modifications, and proton pump inhibitors (PPIs). However, medically refractory GERD is becoming increasingly common, requiring a tailored approach in the management of GERD.