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Studies on Potentially Serious Manifestations of Acid Reflux

by Medindia Content Team on October 19, 2007 at 1:01 PM
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Studies on Potentially Serious Manifestations of Acid Reflux

Two new studies presented at the 72nd ACG Annual Scientific Meeting have drawn attention too the fact that little is known about the connection between gastroesophageal reflux and its associated problems that may seem unrelated. Often people do not realize that symptoms such as chronic cough or chest pain can be caused by acid reflux into the esophagus, because they do not experience classic heartburn symptoms or acid regurgitation.

Researchers at the Brigham & Women's Hospital in Boston studied patients in emergency rooms who complained of serious chest pain. They measured and recorded pH levels in the esophagus of 31 patients for two days to determine whether excessive acid caused their chest pain. Researchers found more women than men were being rushed to the emergency room with chest pain that was not related to the heart.

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Abnormal reflux of acid that would fit the diagnosis of GERD was seen in 57 percent of patients. There are two types of acid reflux, supine, which occurs when the patient is sleeping, and upright which occurs when the patient is awake. In this study, men had more upright reflux, while women experienced both reflux during sleep and while they were awake.

According to lead investigator Dr. Julia J. Liu, "Often the role of acid reflux has been overlooked as a potential factor in the diagnosis and treatment of patients with serious chest pain. But, it is important for patients never to assume their chest pain is caused by GERD until they have been thoroughly evaluated by a physician to rule out heart disease. If they experience persistent chest pain, they should seek emergency medical care."
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GERD is one of the most common causes of chronic cough. While persistent cough can be caused by acid reflux, in some cases, the cough could result from the reflux of non-acidic stomach contents.

Researchers at the Medical University of South Carolina in Charleston studied a group of patients with persistent cough who took acid-suppression therapy (proton pump inhibitors) over a period of three years to evaluate the cost-effectiveness of MII-pH, a device that can detect reflux without depending on the acidity of the contents that refluxes into the esophagus. Unlike conventional pH monitoring, which measures acidity, this new technique can detect non-acid reflux.

Researchers used a cost-utility analysis to evaluate the cost-effectiveness of this diagnostic intervention among patients on high dose PPI therapy with chronic persistent cough who might be candidates for anti-reflux surgery, such as laparoscopic fundoplication. Researchers included costs of medication use, physician visits and surgery in their model.

According to Dr. Deepika Koya, "The use of MII-pH testing in patients who experience reflux of non-acid stomach contents is cost-effective by helping clinicians determine which patients would benefit from anti-reflux surgery and excluding those for whom surgery may have no benefit. This warrants further evaluation of widespread application of MII-pH testing in the diagnosis of patients with persistent chronic cough on adequate medical therapy."

Source: Eurekalert
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