Stent Fracture of Biolimus-Eluting Stent (Biofreedom) Complicated With Micro-Coronary Artery Aneurysm.

Coronary stent fractures (SFs) are an emerging complication of coronary stents. There are numerous risk factors for SF, which include vessel angulation, use of sirolimus-eluting stent (SES), long stents, multiple stent layers, stent overlap, inflammation, hypersensitivity, stenting in the right coronary artery, heavy calcification, ostial bifurcational lesions, and stent overexpansion. There have been reports of SF in BES (Nobori) in past studies, but no reports on BES (Biofreedom) have been documented yet. SF increases the risk of in-stent restenosis, stent thrombosis (ST), target lesion revascularization and major adverse cardiac events. A coronary artery aneurysm (CAA) is a rare complication of SF. Although the risk of CAA rupture with SF is high, the treatment and management of CAA with SF remain unclear. Here, we report the case of a 72-year-old man who had SF of a BES (Biofreedom) complicated with a micro-CAA and review some of the literature.