Rupture of atherosclerotic plaque and subsequent thrombosis of the vessel is responsible for the development of acute ischemic coronary syndromes. A lipid-rich core (particularly in the shoulder regions of lesions), abundance of inflammatory cells, a thin fibrous cap and dysfunctional overlying endothelium characterize plaques that are prone to rupture.

Reference

Weissberg PL. Eur Heart J Supplements 1999:1:T13–18.