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Aortocoronary Bypass Grafting With Expanded Polytetrafluoroethylene: 12-Year Patency 1

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Abstract

Prosthetic coronary artery bypass conduits are rarely used because the rate of thrombosis is inherently higher than that with autologous conduits. The low medium-term patency rates of prosthetic grafts have restricted their use primarily to patients with inadequate autologous conduits or to selected emergencies. We describe a patient treated with expanded polytetrafluoroethylene who had documented patency 12 years after the operation.

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Comment

In previous reports with mean follow-up of approximately 12 months, patency rates of ePTFE coronary bypass grafts vary widely, from an average of 60% at 1 year to a mean of 14% at 45 months 2, 3, 4, 5. Reports of longer periods of patency have been sporadic, in the form of case reports [6].

One factor that improves patency of ePTFE grafts is high blood flow. Flow through prosthetic coronary bypass conduits can be maximized by selection of target vessels with large diameter and runoff and, in

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Copyright © 1998 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.