The purpose of this study is to compare the effectiveness and safety, at 24 months, of the TITAN2 stent to any bare-metal stent (BMS) in Cobalt-Chromium in a population presenting an indication for these stents among 40% of which present an acute coronary syndrome (ACS).

The EVIDENCE II trial is a post-registration study for TITAN2 stent initiated on the request of the French Health Authorities' (HAS) in June 2009 for the next renewal of registration on the list of reimbursable products and services in France.

The study is so designed to compare the effectiveness and safety at 24 months of the TiTAN2 versus Cobalt-Chromium BMS randomly assigned. As a part of the secondary objectives, a cost-effectiveness study is also planned.

The comparators are cobalt chromium stents CE marketed and free of any coating (nude BMS).

All will be used in their authorized indications.

A total of 1350 patients will be included over a period of a year or more and followed for 24 months for the primary endpoint (MACE rate at 24 months in the overall population : cumulative incidence of cardiac deaths, MI and target lesion revascularization (TLR)).

Patients will also be clinically followed at 6 and 12 months . Medico economic datas are to collect at a similar time point.

An independent Clinical Event Committee, unaware of the treatment allocation, will be in charge of the adjudication of all the cardiac events including MACE (main objective)collected.

The calculation of the number of subjects specifies that 1350 patients are needed to meet the primary endpoint of the study.

Enrolled patient will be randomly assigned in a 2:1 fashion as follows :

• 900 patients in TITAN2 arm including 360 with ACS (Arm A)
• 450 patients in Cobalt-chromium arm including 180 with ACS (Arm B) In case of more than one stent needed, the protocol mandated using the same stent than the one assigned in all the lesions treated.

Inclusion Criteria:

• Patient with symptomatic de novo coronary lesion involving one or two vessels
• Patient presenting a lesion with > 50% stenosis
• Patient who must undergo a percutaneous coronary intervention (PCI) in the indications of Cobalt-chromium bare metal stents and TITAN2 stents and being able to be indifferently treated with one or the other of these stents.
• Written informed consent
• Expected survival > 2 years
• Patient reachable by phone throughout the duration of the study.

Exclusion Criteria:

• Pregnant/Lactating women
• Women of childbearing potential (last menstrual period <12 months) not using effective contraception
• Patient under legal protection
• Indication of coronary artery bypass graft surgery (CABG)
• History of coronary artery bypass graft surgery (CABG)
• Intrastent restenosis lesion
• Bifurcation lesion with the exception of those treated with a standardized approach (provisional stenting with final kissing in the side branch)
• Left main coronary lesion
• Ostial target lesion
• Previous drug-eluting stenting
• Previous bare metal stenting or balloon angioplasty in the 12 months prior the inclusion; if this implantation involved the target artery, separate the new implanted stent at a distance ≥ 10 mm.
• History of stent thrombosis
• Heavily calcified lesion
• Use of the Rotablator
• Left ventricular ejection fraction (LVEF) < 30%
• Cardiac arrest, cardiogenic shock or severe heart failure (Killip stage III or IV)
• Severe chronic renal failure (creatinine clearance <30 ml min)
• Cardiac or renal transplantation
• Major surgery within the last 14 days
• Surgery scheduled within 30 days (non-ACS patients) or 12 months (if ACS) at the time of the randomization
• History of major bleeding
• Pathology with major risk of bleeding or any condition, allergy or intolerance which is incompatible with anticoagulation and / or extended antiplatelet therapy
• Known allergy to Titanium, Nickel, Cobalt or Chromium
• Patient currently participating in another clinical trial
• Non-compliant patient (treatment and follow-up)
• Patient living abroad