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J Thorac Cardiovasc Surg 2004;127:435-439
© 2004 The American Association for Thoracic Surgery

Surgery for acquired cardiovascular disease

Effect of surgical revascularization of a right coronary artery tributary of an infarcted nonischemic territory on the outcome of patients with three-vessel disease: A prospective randomized trial

^a Department of Cardiac Surgery, Catholic University, Rome, Italy

Received for publication July 5, 2003; revisions received August 21, 2003; accepted for publication August 26, 2003.

^* Address for reprints: Mario Gaudino, MD, Divisione di Cardiochirurgia, Policlinico Universitario A. Gemelli, Largo A. Gemelli 8, 00168 Rome, Italy
mgaudino{at}tiscali.it

BACKGROUND: We evaluated the in-hospital and long-term effects of surgical grafting of a dominant graftable right coronary artery tributary of an infarcted nonischemic territory in patients with triple-vessel disease who were undergoing coronary artery bypass grafting.

METHODS: Of 303 consecutive patients undergoing coronary artery bypass grafting with 3-vessel coronary disease and a dominant right coronary artery tributary of an infarcted nonischemic territory, 154 were randomized to right coronary artery revascularization and 149 to no right coronary artery grafting. In all cases, standard on-pump surgical myocardial revascularization was performed.

RESULTS: Overall hospital mortality was 2 of 154 versus 1 of 149 (P = .97); no difference in in-hospital outcome was observed between the 2 groups. At follow-up, cardiac event–free survival was 84 of 152 in the right coronary artery grafting series and 62 of 148 in the non–right coronary artery grafting group (P = .20). However, when the analysis was limited to surviving patients without new scintigraphic evidence of ischemia (to avoid confounding factors derived from ischemia in the left coronary system or right coronary artery graft malfunction), we found that patients who received a right coronary artery graft had fewer cardiac events, a lower incidence of arrhythmia, and less left ventricular dilatation than did the non–right coronary artery revascularized series.

CONCLUSIONS: Surgical grafting of a right coronary artery tributary of an infarcted nonischemic territory in patients with 3-vessel coronary artery disease submitted to coronary artery bypass grafting improved late electric stability, ventricular geometry, and event-free survival but did not affect in-hospital or 10-year survival.

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