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Upper Endoscopy


An upper endoscopy can be used to determine the cause of heartburn and is often performed as an outpatient procedure. Upper endoscopy uses a thin scope with a light and camera at its tip to look inside of the upper digestive system — the esophagus, stomach, and the first part of the small intestine, called the duodenum. During endoscopy, certain procedures such as taking a small tissue sample (biopsy) for testing may be performed.

Read more at WebMD.