Randomized Controlled Study of the Traditional Percutaneous Coronary Intervention and Intervention Using Optical Coherence Tomography of Incomplete Stent Adhesion and Extent of the Formation of Neointima by Resolute Zotarolimus-eluting Stent Insertion

Inclusion Criteria:

• Single lesion in a Single vessel
• Reference vessel diameter 2.5 - 3.5 mm
• Lesion length ≤ 34 mm and ≤ 34 mm stent length
• Stable angina requiring revascularization, patients with unstable angina
• The patient has no difficulty to enforce the follow-up angiography
• Patient is ≥ 20 years old

Exclusion Criteria:

• Lesions with graft vessel, thrombosis, restenosis, and bifurcation requiring 2 stents
• Reference vessel diameter < 2.5 mm or > 4.0mm
• Contraindication to anti-platelet agents
• Treated with any DES within 3 months at other vessel
• Creatinine level ≥ 2.0 mg/dL or ESRD
• Severe hepatic dysfunction (3 times normal reference values)
• Patients with LVEF < 30%
• Life expectancy 1 year
• Lesions with CTO or left main
• Target vessel of ST-elevation MI
• Lesions requiring overlapped stenting or more than 2 DES in each vessel
• Heavy calcified lesions (definite calcified lesions on angiogram)
• Far distal or tortuous lesions having difficulties in OCT evaluation or follow-up OCT
• Pregnant women or women with potential childbearing