The present study will utilize the imaging capabilities of OCT to assess stent strut malapposition and tissue coverage in two different types of DES. The biolimus-eluting stent eludes biolimus from a biodegradable polylactic acid polymer on the abluminal surface of a stainless steel stent. This stent will be compared in a randomized fashion to the permanent polymer based everolimus-eluting coronary stent made of cobalt chromium alloy.