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X Syndrome, Angina

Angina Pectoris or angina-like Chest Pain with a normal coronary arteriogram and positive Exercise Test. The cause of the Syndrome is unknown. While its recognition is of clinical importance, its Prognosis is excellent. (Braunwald, Heart Disease, 4th ed, p1346; Jablonski Dictionary of Syndromes & Eponymic Diseases, 2d ed). It is different from Metabolic Syndrome X, a Syndrome characterized by Insulin Resistance and Hyperinsulinemia, that has increased Risk for Cardiovascular Disease.