Spirit II Results Support Strength of Boston Scientific's Two Drug-Eluting Stent...(ID-TLR) rates were comparable at 3.8 per...),Health

Stent thrombosis rates at two years using the Academic Research Consortium (ARC) definite/probable definition were low for both the XIENCE V (PROMUS) Stent (0.9%) and the TAXUS Stent (1.4%). Angiographic outcomes showed numerically equivalent late loss, with 0.33 mm for XIENCE V (PROMUS) and 0.34 mm for TAXUS (p=0.60). In-stent binary restenosis rates at two years were also comparable for the XIENCE V (PROMUS) Stent and the TAXUS Stent (2.1% vs. 2.9%, p=1.0).

"Boston Scientific's two DES platforms - the TAXUS and PROMUS Stents - both performed extremely well in the SPIRIT II Trial out to two years," said Paul LaViolette, Chief Operating Officer of Boston Scientific. "The data, once again, demonstrated impressive safety and efficacy profiles with low stent thrombosis rates and similar clinical outcomes. We look forward to future data from the SPIRIT Clinical Trial Program as well as from our PROENCY Registries in Europe and the United States - the first to observe different 'Olimus-eluting coronary stents in a real-world setting."

In February, Boston Scientific announced that the first patient had been enrolled in its PROENCY (PROMUS(TM), ENdeavor(R) and CYpher(R)) European Registry. The registry will collect real-life clinical outcome data for the PROMUS Stent and compare them with data from Johnson & Johnson's Cypher(R) Sirolimus-Eluting Stent and Medtronic's Endeavor(R) Zotarolimus-Eluting Stent in patients in routine clinical practice. A U.S. PROENCY Registry is expected to begin enrolling patients in July and complete enrollment by the end of 2008.

The XIENCE(TM) V (PROMUS) Stent is currently pending approval by
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