News | September 30, 2009

Medtronic’s Resolute DES Maintains Strong Efficacy, Safety in Long-Term Follow-up

September 30, 2009 – New clinical data released at TCT 2009 last week showed strong and sustained efficacy and safety of the Resolute Zotarolimus-Eluting Coronary Stent from Medtronic Inc. in long-term patient follow-up.

The single-arm RESOLUTE trial (n=129) demonstrates a low, 1.6 percent cumulative rate of target lesion revascularization (TLR) with no new TLRs between two and three years of follow-up. Cumulative rates of other clinical events remained low as well, with no new myocardial infarctions or cardiac deaths after two years. In addition, the rate of stent thrombosis remained at zero, despite only 36.6 percent of patients being maintained on dual anti-platelet therapy (aspirin and clopidogrel) at three years.

The three-year results of RESOLUTE were released at Transcatheter Cardiovascular Therapeutics (TCT) 2009, Sept. 21–25 in San Francisco.

“RESOLUTE included patients with a high degree of complexity for an initial clinical trial of a new drug-eluting stent,” said principal investigator professor Ian Meredith of Monash Medical Center in Australia. “Their remarkable outcomes at three years suggest that the Resolute DES offers a durable combination of long-term safety and efficacy that bodes well for the broad range of patients we see in the challenging environment of standard clinical practice.”

Average lesion length of RESOLUTE patients was 15.5 mm, and 82 percent of the subjects had challenging B2/C lesions. In addition, 46 percent had a prior myocardial infarction (MI), and 18 percent had a prior percutaneous coronary intervention (PCI); 18 percent had diabetes; 30 percent had unstable angina; and 70 percent had a history of smoking.

The Resolute DES features Medtronic’s proprietary BioLinx polymer system, which was designed to minimize inflammation, to reduce thrombotic risk and to enable rapid, complete and functional healing of the treated vessel. The BioLinx system has demonstrated the same biocompatibility requirements as the phosphorylcholine (PC) polymer used in the company’s Endeavor Zotarolimus-Eluting Coronary Stent. Compared to the PC polymer, the BioLinx system is designed to extend the duration of drug exposure in the vessel – an elution profile of potential relevance to patients whom physicians consider to be at highest risk of needing a repeat procedure. Developed by Medtronic scientists, it is the first polymer created specifically for use on a DES.

The Resolute DES is commercially available in more than 100 countries outside the United States. Inside the United States it is limited to investigational use in an FDA-approved clinical trial called RESOLUTE US. Medtronic is collaborating with physicians around the world to complete a global clinical trial program that will enroll more than 7,500 patients worldwide, with more than 6,300 patients receiving a Resolute DES.

RESOLUTE US (n=1,399) is a large, prospective, multicenter, controlled single-arm trial with a primary endpoint of target lesion failure (TLF) at 12 months. TLF is defined as cardiac death, target vessel myocardial infarction (Q-wave or non-Q-wave), or clinically-driven TLR by percutaneous or surgical methods. Enrollment in RESOLUTE US is expected to be complete by the end of 2009. The resulting data will be used to seek FDA approval, which Medtronic expects to receive in 2012.

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