Abstract
Angina with "normal coronary arteries" might best be thought of as "angina with coronary dysfunction". It seems likely that this syndrome is due to inadequate regional myocardial perfusion with manifestations similar to those seen when ischemia results from occlusive coronary artery disease. The prognosis of the disorder is favorable, but occasional catastrophic events occur. It appears likely that maldistribution of perfusion results from dynamic changes affecting proximal, and perhaps distal coronary vessels, potentially mediated by vasoactive substances released from platelets precipitating or exacerbating coronary arterial spasm. Clarification of the pathogenesis of the syndrome should permit implementation of more effective therapy and prevention of the rare malignant sequelae of this disorder.
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