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Heart 1998;80:9-13; doi:10.1136/hrt.80.1.9
Copyright © 1998 BMJ Publishing Group Ltd & British Cardiovascular Society

Heart 1998;80:9-13 ( July )

Long term results of reoperations for recurrent angina with internal mammary artery versus saphenous vein grafts

D Dougenis,a A H Brownb

a Department of Surgery, Cardiothoracic Division, Patras University School of Medicine, Patras, Greece, b Department of Cardiothoracic Surgery, Regional Cardiothoracic Centre, Freeman Hospital, Newcastle upon Tyne, UK

Correspondence to: Dr D Dougenis, Department of Surgery, Division of Cardiothoracic Surgery, Patras University School of Medicine, Rion 26500, Greece.

Accepted for publication 17 March 1998

Objective---To evaluate the long term results of coronary reoperations for recurrent angina with internal mammary (thoracic) arteries versus vein grafts.
Design---Inception cohort of 103 patients with a mean follow up of 7.1 years (range 1.0-11.6).
Setting---Regional cardiothoracic centre.
Patients---Among 103 consecutive patients, mean (SD) age 61.8 (9.7) years, who were reoperated for recurrent angina between January 1982 and December 1991, 53 patients had unilateral or bilateral internal mammary artery (IMA) grafting supplemented or not with saphenous vein (SV) grafts (group A), and 50 patients underwent reoperative coronary surgery using SV grafts only (group B). The two groups were comparable in terms of demographic and clinicopathological data.
Measurements and results---Operative mortality was 5.6% (95% confidence interval 4.6 to 6.6) for group A, and 10% (8.2 to 11.8) for group B (p > 0.05). Probability of freedom from new recurrence of angina was 86% at 5 and 10 years in group A, compared with 56% and 25% respectively in group B (p = 0.005). Freedom from cardiac events was estimated to be 81% at 5 and 10 years in group A, v 52% and 20% for group B, respectively. Actuarial survival was 95% v 93% at 3 years, 95% v 85% at 5 years, and 88% v 71% at 10 years after reoperation (p > 0.05).
Conclusions---The long term results of IMA are superior to SV grafts in terms of freedom from new recurrence of angina and other cardiac events. The IMA is thus the conduit of choice in coronary revascularisation.

Keywords: coronary artery bypass;  coronary reoperation;  recurrent angina;  internal thoracic (mammary) artery

© 1998 by Heart
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