Significant left main stenosis following asymptomatic dissection during coronary arteriography.

The natural history of minimally symptomatic or asymptomatic iatrogenic coronary dissection is not well-defined. While generally considered a serious and life-threatening complication of coronary arteriography, there have been some reported cases of spontaneous resolution without residuals. We describe a case demonstrating that coronary artery dissection, even when initially asymptomatic, may later progress and result in significant or complete coronary occlusion. The implications of this are discussed.