COMPARATIVE STUDY
ENGLISH ABSTRACT
JOURNAL ARTICLE
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[Ten-year survival and cardiac event-free rates in Japanese patients with the left anterior descending artery revascularized with internal thoracic artery or saphenous vein graft: a comparative study].

To evaluate the long-term results of surgical patients with coronary artery bypass grafting (CABG), we comparatively analyzed the 10-year survival and cardiac event-free rates between 713 patients group with at least one internal thoracic artery to the left anterior descending artery (LAD), (ITA-CABG) and 241 patients group revascularized with vein grafts alone (SVG-CABG). ITA-CABG patients had more progressed diseases with a higher incidence of risk factors than SVG-CABG patients: number of vessel diseased 2.5 +/- 0.7 vs 2.3 +/- 0.7, LMTD 20.2% vs 14.1%, diabetes mellitus 37.3% vs 27.0% and hyperlipidemia 38.0% vs 30.7%. The 10-year cumulative LAD graft patency and severe disease-free rate was 90.3 and 67.0% for ITAs and vein grafts in this series. The 10-year overall actuarial survival, cardiac death-free and cardiac event-free rates for ITA and SVG groups were 88.8 vs 79.5%, 97.4 vs 92.6% and 84.1 vs 73.1%, all with a statistical significance (generalized Wilcoxon or logrank method). For the patients with reduced ventricular systolic function (EF < or = 0.4), ITA-CABG offered a significantly better 10-year cardiac death free rate. Also, for the diabetic patients, ITA-LAD offered a significantly better 10-year cardiac event-free rate. In conclusion, the use of ITA graft can reduce postoperative cardiac events and enhance the long-term survival in Japanese patients. The ITA should be utilized at least for LAD in all CABG patients whenever feasible.

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