Choice Of Optimal Strategy For Bifurcation Lesions With Normal Side Branch

Inclusion Criteria: * Clinical * Patients with angina and documented ischemia or patients with documented silent ischemia * Patients who are eligible for intracoronary stenting * Age \>18 years, \<75 ages * Angiographic * De novo lesion located in a major bifurcation point with the MEDINA classification type 1.1.0, 1.0.0, or 0.1.0 * Main vessel : \>= 2.5 mm in vessel size, \>= 50% in diameter stenosis and =\< 50 mm in lesion length by visual estimation, in which the lesion is covered with =\< 2 stents * Side branch :\>= 2.0 mm in vessel size and \< 50% diameter stenosis by visual estimation Exclusion Criteria: * History of bleeding diathesis or coagulopathy * Pregnant * Known hypersensitivity or contra-indication to contrast agent, heparin, sirolimus, paclitaxel and zotarolimus * Limited life-expectancy (less than 1 year) due to combined serious disease * ST-elevation acute myocardial infarction =\< 2 weeks * Characteristics of lesion: * Left main disease * In-stent restenosis * Graft vessels * TIMI flow =\< grade 2 in the side branch * Chronic total occlusion * Renal dysfunction, creatinine \>= 2.0mg/dL * Contraindication to aspirin, clopidogrel or cilostazol