[Outcome of patients implanted with bioabsorbable polymer sirolimus-eluting stent (Excel) and the durable polymer sirolimus-eluting stent (Cypher)].

OBJECTIVE

To compare the outcome of patients with coronary artery disease implanted with bioabsorbable polymer sirolimus-eluting stent (Excel) and the durable polymer sirolimus-eluting stent (Cypher).

METHODS

One year clinical and 7 months angiographic follow-up data were analyzed in 591 consecutive patients implanted with Excel (E group: n = 350, 58.1 +/- 10.9 years old) or Cypher (C group: n = 241, 56.4 +/- 10.7 years old) during May 2006 to November 2006 in our center.

RESULTS

There were more patients with old myocardial infarction and triple vessel diseases while there were less left main stem disease in E group compared to those of C group at baseline. Reference vessel diameter [(2.76 +/- 0.45) mm vs. (2.87 +/- 0.38) mm, P = 0.043], stent diameter [(3.11 +/- 0.48) mm vs. (3.25 +/- 0.34) mm, P = 0.045] and minimal stent diameter [(2.67 +/- 0.43) mm vs. (2.78 +/- 0.35) mm, P = 0.046] and rate of post-dilation (15.9% vs. 46.7%, P < 0.001) were all significantly smaller in E group compared to those in C group. Procedure was successful in all patients. One year clinical follow-up results showed similar results on major adverse cardiac events (MACE) rate (8.3% vs. 7.1%, P = 0.641), rate of cardiac death (0.9% vs.0.0%, P = 0.274), non-fatal myocardial infarction (2.0% vs. 1.2%, P = 0.747) and target vessel revascularization (5.4% vs. 5.8%, P = 0.857) between E and C groups. Total (0.9% vs. 0.4%, P = 0.649), early (0.6% vs. 0.0%, P = 0.516) and late (0.3% vs. 0.4%, P = 1.000) stent thrombosis rates according to Academic Research Consortium (ARC) standard definitions (definite + probable) were also similar between the E and C groups. Seven months angiographic follow-up results indicated that there were no differences of in-stent and in-segment restenosis rate between E and C groups (4.7% vs. 3.2%, P = 0.725; 5.6% vs. 3.2%, P = 0.505) but in-stent and in-segment late loss were significantly smaller in E group than those in C group [(0.18 +/- 0.07) mm vs. (0.21 +/- 0.08) mm, P < 0.001; (0.21 +/- 0.09) mm vs. (0.23 +/- 0.11) mm, P = 0.003].

CONCLUSION

One year clinical and 7 months angiographic outcome were comparable in patients implanted with Excel and Cypher sirolimus-eluting stents.