The Heartburn reference article from the English Wikipedia on 24-Jul-2004
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Heartburn

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Technically known as pyrosis, heartburn is a symptom described as a mid-sternal burning sensation often radiating to the neck. It is associated with gastro-esophageal reflux disease, or GERD. It is relieved by antacids such as Tums, Rolaids or sodium bicarbonate.

External Links
- eMedicine Health - Heartburn Overview