Independent predictors of in-stent restenosis after drug-eluting stent implantation for ostial right coronary artery lesions.

Objectives: We evaluated the angiographic patterns and predictors of in-stent restenosis (ISR) for ostial lesions of the right coronary artery (RCA) to clarify the mechanism of insoluble restenosis.

Background: Although ISR of the RCA still occurs, limited data is available regarding the associated angiographic findings.

Methods: Between January 2005 and September 2013, we recruited consecutive patients undergoing routine angiography 6-18months after implantation of a drug-eluting stent (DES).