Analisis Kejadian Trombosis Dini Konduit Vena Pasca-Bedah Pintas Arteri Koroner dengan Teknik On-Pump dan Off-Pump Pada Populasi Non-Resisten Aspirin = Early Vein Graft Thrombosis Analysis after On-Pump and Off-Pump Coronary Artery Bypass Graft Surgery in Non-Resistant Aspirin Patients