PK(Pharmacokinetic) Papyrus Covered Coronary Stent System

Inclusion Criteria: * Patients with acute perforations of native coronary arteries and coronary bypass grafts in vessels 2.5 to 5.0 mm in diameter Exclusion Criteria: * Patients in whom antiplatelet agents or anticoagulation therapy is contraindicated. * Patients with a known allergy or hypersensitivity to amorphous silicon carbide or any other compound of the system (siloxane-based polyurethane, L-605 cobalt chromium alloy including tungsten and nickel). * Lesions that cannot be reached or treated with the system. * Lesions with threatened or abrupt closure during attempted pre-dilation prior to stent implantation. * Risk of treatment-related occlusion of vital coronary artery side branches. * Uncorrected bleeding disorders. * Allergy to contrast media.