Polish researchers report people with existing coronary artery disease may also have, gastro-esophageal reflux disease, GERD, and this can trigger constriction of the heart's blood vessels and damage the heart further.

Dr. Slawomir Dobrzycki from the Medical University in Bialystok and colleagues had 50 patients with proven coronary artery disease undergo 24-hour continuous recording of the acidity in the esophagus and the heart's electrical rhythm.

Then the 23 patients found to have GERD were given the acid-reducing drug omeprazole to take twice daily for seven days, according to a Retuers Health report. On the seventh day, the simultaneous ECG and acidity Holter monitoring was repeated.

The results demonstrated that a "multidisciplinary approach" to evaluating patients with chest pain should be able to uncover the underlying problem and lead to the best treatment.