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  • Title: [Initial results and long-term outcome of percutaneous coronary intervention in patients with previous coronary artery bypass grafting].
    Author: Okada H, Tsurumi Y, Kasanuki H, Nishida H, Endo M.
    Journal: J Cardiol; 2001 Sep; 38(3):111-21. PubMed ID: 11577608.
    Abstract:
    OBJECTIVES: The incidence of percutaneous coronary intervention following bypass surgery(coronary artery bypass grafting: CABG) is not low, but the outcomes of patients requiring percutaneous coronary intervention after CABG are not well known. METHODS: From June 1970 to June 2000, 2,981 patients underwent CABG at our institute using 6,747 grafts including 2,875 saphenous vein graft(SVG), 3,042 internal thoracic artery(ITA), 706 gastro-epiploic artery(GEA), 122 radial artery(RA), and 2 others. Three hundred twenty-seven patients underwent subsequent percutaneous coronary intervention in 520 lesions(104 SVG, 97 ITA, 12 GEA, 8 RA, 299 native artery). The initial results and long-term outcome following percutaneous coronary intervention in these 520 consecutive procedures were evaluated retrospectively. RESULTS: Percutaneous coronary intervention to arterial grafts were performed mainly within the early post-operative period, whereas percutaneous coronary intervention to vein grafts had two periodic peaks in the early post-operative period and at 7 years after CABG. Procedural success rate of percutaneous coronary intervention was 90% for SVG, 81% for ITA, 58% for GEA, 88% for RA, and 87% for native arteries. Restenosis rate was 56% for SVG, 30% for ITA, 83% for GEA, 83% for RA, and 49% for native arteries. Cardiac events after percutaneous coronary intervention with previous CABG were greater in cases of ITA, followed by native arteries, SVG, GEA and RA(p = 0.0046). In the early post-operative period, there was no significant difference between ITA and SVG. In the chronic stage, the prognosis of cardiac events after PCI for SVG was worse than for ITA. CONCLUSIONS: Percutaneous coronary intervention after CABG requires strategic consideration based on target-specific initial results and long-term outcome.
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