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Eur J Cardiothorac Surg 2000;17:407-414
© 2000 Elsevier Science NL
Cliniques Universitaires St-Luc, Avenue Hippocrate 10, B-1200 Brussels, Belgium
Corresponding author. Tel.: +31-71-526-3992; fax: +31-71-526-6965
e-mail: rdion{at}lumc.nl
Objective: Sequential internal thoracic artery (ITA) grafting allows a more complete arterial revascularization of the myocardium. We wanted to verify whether the excellent clinical and angiographic short term results reported by us before where maintained over 10 years and more. Methods: the first consecutive 500 patients having received at least one sequential ITA graft between October 1985 and August 1991 were reviewed. Age averaged 61 years. Fifty-three patients had a left ventricular ejection fraction less than 40%, 117 were not elective, 35 (7%) were reoperations, 56 (11%) had diabetes. In total 2156 anastomoses were constructed (4.3/patient), among them 1367 arterial anastomoses (2.7/patient) and 1150 sequential ITA anastomoses (2.3/patient). The clinical follow-up was 97.4% complete and averaged 9.6 (range 8.6–13.6) years. One hundred and sixty-one patients consented to a late angiographic restudy after a mean interval of 7.4 (range 1–12.2) years. Results: At 5 and 10 years, 89 and 72% of the patients were still alive. At 10 years 82% are still asymptomatic and 71% free of any type of ischaemia. Only four patients (0.8%) needed a repeat surgical revascularization, and 11 (2.3%) a percutaneous coronary angioplasty. At 5 and 10 years, 92.8 and 69% of the patients remained free of any cardiac event. Overall, 95.5% of the arterial anastomoses were patent and 96.1% of the sequential ITA were patent. There was a significant difference between the patency rate of pedicled ITA and free ITA anastomoses: 96.3 vs. 86.5% (P=0.02). There was no difference in patency between left ITA and right ITA anastomoses for the LAD and Cx areas. Sequential ITA anastomoses showed excellent patency rates to all coronary vessels but the very distal circumflex and the distal branches of right coronary artery (85%). There was no significant difference between the patency of the proximal and the distal sequential ITA anastomoses. The sequential anastomoses constructed in the length tend to remain more patent than the diamond-shaped ones: 97.2 vs. 91.5% (P=0.004). Conclusions: Sequential ITA grafting optimizes arterial revascularization. The long-term patency is excellent, is identical to that of single ITA grafting, and appears not much different from postoperative patency. The need for repeat surgical and interventional revascularization has been extremely low: 3.1% over the whole follow-up.
Key Words: Coronary surgery • Sequential grafting • Internal thoracic artery • Angiographic patency • Long-term follow-up
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