First patient enrolled in LEADERS FREE study

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According to the Biosensors, LEADERS FREE is the world’s first prospective, randomised double-blind trial exclusively involving patients at high risk of bleeding. The study has been designed to investigate whether BioFreedom is as safe as a bare metal stent in this patient group, and can deliver the anti-restenotic benefit of a drug-eluting stent with only a one-month course of dual antiplatelet therapy (DAPT). 

The first patient has been enrolled by the study’s principal investigator Philip Urban at the Hôpital de la Tour, Geneva, Switzerland.

“The results of this study will be particularly important as we hope that they will show, for the first time, that a drug-coated stent can be more effective than a bare metal stent in a subgroup of patients not previously studied, yet just as safe,” Urban commented. “This study could therefore potentially change clinical practice by permitting the use of a drug-coated stent in conjunction with one month’s DAPT duration.”

LEADERS FREE is in the process of enrolling approximately 2,500 patients identified as having a high risk of bleeding from 60 sites across Europe, Asia and South America, with follow-up for two years. Patients in both arms of the study are being prescribed only one month of DAPT.

The co-primary endpoints of the study are: 1) non-inferiority of BioFreedom compared with BMS as measured by specific safety factors (cardiac death, myocardial infarction, and definite/probable stent thrombosis) after one year and; 2) superiority over BMS in terms of clinically-driven target lesion revascularisation at 12 months.

Investigators anticipate enrolment completion by early 2014. Primary endpoint data is likely to be presented during 2015.

“We anticipate that the results from LEADERS FREE will bring real benefits to patients at high risk of bleeding, who cannot currently be given a drug-eluting stent due to the need for a prolonged course of DAPT”, concluded Jeffrey B Jump, president of Biosensors’ Cardiovascular Business Unit. “With BioFreedom, they will be now be able to benefit from a stent with an anti-restenotic drug, yet still only take a month-long course of DAPT.”

Three-year results from the BioFreedom FIM study were presented at Transcatheter Cardiovascular Therapeutics Conference (TCT), Miami, Florida, USA, on 23 October 2012. They showed similar rates of major adverse cardiac events (a composite of all death, MI, emergent cardiac artery bypass graft and target lesion revascularisation) between BioFreedom and Boston Scientific’s Taxus Liberté DES (11.9% vs. 10.0%), with no evidence of stent thrombosis in either group.


BioFreedom is the latest development in Biosensors’ stent technology, featuring a micro-structured abluminal surface which permits the controlled release of Biolimus A9 (BA9) without the use of a polymer.