Apposition Assessed Using Optical Coherence Tomography of Chromium Stents Eluting Everolimus From Cobalt Versus Platinum Alloy Platforms

The purpose of the trial is to directly compare the Cobalt Chromium platform everolimus-eluting stent, Xience Prime™, with the Platinum Chromium platform everolimus-eluting stent, Promus Element™, in relation to stent scaffolding shape, position with the heart blood vessel and extent of tissue coverage (at 6 months) using optical coherence tomography. Hypotheses: 1. The alloy composition and strut design of a drug-eluting stent has a direct bearing on stent apposition measured using OCT. 2. Stent design and alloy composition have a direct influence on radial support and scaffold shrinkage.