Early aneurysm formation after drug-eluting stent implantation: an unusual life-threatening complication.

Coronary aneurysm after stent implantation is a rare complication. Coronary aneurysms have been reported after drug-eluting stent implantation, but there has been no clear elucidation of time course, mechanism and therapeutic implications. We report two patients who developed coronary aneurysms within two weeks of the procedure and required surgical intervention to treat the complication. The possible putative mechanisms are discussed.