The RETRIEVE Study: Use of the FiberNet® Embolic Protection System in Saphenous Vein Grafts

Inclusion Criteria: * Candidate for percutaneous transluminal coronary angioplasty (PTCA), stenting and emergent coronary artery bypass graft (CABG). * Myocardial ischemia as evidenced by one or more of the following: * Diagnosis of stable or unstable angina pectoris * ECG changes consistent with ischemia * Positive functional study * Recent myocardial infarction * Lesion(s) is located within SVG and is ≥ 50% and \< 100% stenosed. Exclusion Criteria: Clinical Criteria: * Myocardial infarction with documented total CK-MB \> 2 times the upper limit of normal within the past 24 hours, or currently experiencing an acute myocardial infarction. * Undergone cardiac surgery within the past 60 days. * A planned invasive surgical procedure within 30 days. * The lesion(s) is in an SVG that is less than 2 months post-implant. * Left ventricular ejection fraction \< 20%. * A stroke or transient ischemic neurological attack (TIA) within the past 2 months. Angiographic Criteria: * The lesion(s) is in an arterial conduit. * Lesion is within 10 mm of the proximal anastomosis. * More than two native lesions \[in addition to the SVG lesion(s)\] that need to be treated at the index procedure. * More than two SVGs that need to be treated at the index procedure. * Chronic total occlusion of a target lesion. * The SVG lesion(s) requires treatment with a large device other than PTCA prior to stent placement (such as, but not limited to, directional coronary atherectomy, excimer laser, rotational atherectomy, rheolytic thrombectomy or brachytherapy).