An Observational Safety Evaluation of Patients Treated With the NEVO™ Sirolimus-eluting Coronary Stent. (NEVO II)

An Observational Safety Evaluation of Patients Treated With the NEVO™ Sirolimus-eluting Coronary Stent.

As a result of the implementation of Protocol Am3.0, the design and objective of the NEVO II trial were changed to focus on the safety follow-up of the 103 NEVO™ subjects. Although this trial started interventional, the remainder of the study will be observational.

The objective of this prospective, observational study is to ensure the safety and the wellbeing of subjects treated with the NEVO™ SES.

Restenosis remains a frequent cause of late failure after initially successful coronary angioplasty occurring in as many as 20-40% of procedures performed. Loss of luminal diameter as a result of restenosis has been attributed to three physiologic mechanisms: passive elastic recoil of the vessel, geometric vessel remodeling and neointimal hyperplasia. Coronary stents provide mechanical scaffolding that reduces restenosis by limiting the extent of elastic recoil and late vascular remodeling. Despite these improvements, the incidence of restenosis following coronary stent implantation occurs in 20-40% of cases. Restenosis following stenting is primarily a result of neointimal hyperplasia.

The methodology in interventional cardiology has historically evolved from diagnostic coronary angiography to balloon angioplasty, the use of bare metal stents, their refinement to drug-eluting stents with a durable polymer, and is now on the verge to drug-eluting stents with further developed drug delivery approaches such as the reservoir technology and the use of bioresorbable polymers. While the reservoir approach may make drug delivery more controllable, the reduction of polymer exposure to the vessel wall was designed to improve vascular healing and reduce the occurrence of undesirable side effects such as stent thrombosis especially on the long-term once the drug is completely eluted.

While to date, these are concepts validated preferably in pre-clinical studies, and only limited clinical data are available to suggest efficacy and safety of the NEVO™ SES, this study seeks to assess its clinical value in a large and unselected cohort of subjects representing real-world contemporary treatment patterns through a non-inferiority comparison with the most widely used DES today, the XIENCE V® / XIENCE PRIME™ / PROMUS® stent.

Between August and October 2010, 156 subjects were enrolled in the trial. Of the 156 subjects, 103 were treated with the NEVO™ Sirolimus-eluting Stent and 53 with the comparator. Based on a small number of acute performance observations, Cordis voluntary suspended enrollment to optimize the balloon catheter.

As a result of evolving market dynamics, and product portfolio decisions, Cordis decided in June 2011 to no longer pursue the development of NEVO™ Sirolimus-eluting coronary stents. As a result of this decision, the design and objective of the NEVO II trial were changed to allow only follow-up of the 103 NEVO™ subjects.

Since the NEVO™ SES is an investigational device; the NEVO™ subjects are being followed-up to safeguard their safety and wellbeing. The 53 subjects from the comparator arm do not need further follow-up due to the fact that they have been treated with a commercially available stent.

Inclusion Criteria:

• Subject has atherosclerotic coronary artery disease with an indication for stent implantation;
• Target lesion(s) with a diameter stenosis of minimally 50% (visual estimate) OR a functional study documenting the hemodynamic relevance of the target lesion(s);
• All target lesion(s) require treatment with stents having diameters from 2.5mm to 3.5mm (visual estimate);
• Subject is ≥18 years of age;
• Subject must sign Ethics Committee approved informed consent prior to undergoing any study specific procedure;
• Subject must be willing and able to comply with specified follow-up schedule.

Exclusion Criteria:

• Planned medical procedures or concomitant disease requiring modification of DAPT regimen within 6 months of enrollment into this study;
• Women of childbearing potential without negative pregnancy test within 7 days before enrollment OR women who do not agree to remain on birth control until angiographic follow-up at 13 months if applicable OR lactating women. For women of childbearing potential, requiring an acute, non-elective procedure, a verbal confirmation of non-pregnancy and birth control is sufficient;
• Currently participating in an investigational study that has not completed the primary endpoint or that clinically interferes with the study endpoints.