two interventional large-volume academic centers based in Poland: the Department of
Cardiology and Structural Heart Diseases, Medical University of Silesia, Katowice, and the
Nicolaus Copernicus University, Bydgoszcz, Poland. Information on the follow-up events was
site-reported and adjudicated by a trained physician-investigator. Data of consecutive
patients with ACS, undergoing PCI with EES (Xience, Abbott Vascular, Santa Clara, CA, USA
and Promus Element, Boston Scientific, Natick, MA, USA) or R-ZES (Resolute Integrity,
Resolute Onyx, Medtronic, Fridley, MN, USA), were collected between November 2009 and
February 2017 (
baseline information, procedural, and clinical outcomes at follow-up were entered into
prespecified electronic case report forms. Angioplasty and stent selection were performed
according to standard techniques at the discretion of the interventional cardiologist. All
patients were prescribed dual antiplatelet therapy (DAPT) consisting of acetylsalicylic
acid, 75 to 100 mg daily, and a P2Y12 inhibitor for at least 1 year according to
guidelines.