Review article
Triggers, acute risk factors and vulnerable plaques: The lexicon of a new frontier

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Abstract

A neglected area of cardiovascular research—study of the mechanisms of acute disease onset—is receiving increased attention. The new interest is based on the undisputed findings that onset of myocardial infarction and sudden cardiac death are more likely soon after awakening, indicating that activities of the patient frequently trigger the diseases. Triggering may occur when stressors produce hemodynamic, vasoconstrictive and prothrombotic forces—acute risk factors—that, in the presence of a vulnerable atherosclerotic plaque, cause plaque disruption and thrombosis. Triggering research may clarify mechanisms and suggest measures to sever the linkage between a potential trigger and its pathologic consequence.

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