Related Experiment Video
Updated: Jan 2, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Functional heartburn: An underrecognized cause of PPI-refractory symptoms
Scott Gabbard1, Sonya Vijayvargiya2
1Department of Gastroenterology, Hepatology & Nutrition, Cleveland Clinic; Assistant Professor, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH gabbars@ccf.org.
Abstract:
Functional heartburn--persistent symptoms of esophageal reflux with no objective evidence of gastroesophageal reflux disease (GERD)--is the most common cause of failure of proton pump inhibitor (PPI) therapy, but it is often overlooked by internists and gastroenterologists.
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