H-Side Branch Stent, A New Stent for the Treatment of True Bifurcation Lesions

Inclusion Criteria: * Older than 20 years old * Patient with angina or asymptomatic ischemic cardiomyopathy who is required to be treated with stent at coronary bifurcation lesion * Bifurcation lesion with 2.5\~4.0mm of main vessel diameter, \<30mm of main vessel length and ≥2.0mm of branched vessel diameter Exclusion Criteria: * Acute myocardial infarction * Confirmed or suspicious presence of thrombus in target lesion * In-stent restenosis lesion * Visual angulation with ≥75° * Lesion with severe calcification or severe tortuosity * Left main lesion * Chronic total occlusion lesion * Graft lesion * Contraindication to antiplatelet drugs * Left ventricular dysfunction (LVEF ≤40%) * Severe hepatic dysfunction (≥2.5 times than reference of AST or ALT) * Renal dysfunction (serum Creatinine \> 2.0mg/dL) * History of cerebral hemorrhage, pulmonary or gastrointestinal bleeding * Hypersensitivity of aspirin, clopidogrel or contrast media * Pregnant woman or possibility of pregnancy during clinical study period