Effectiveness of the Eradication of Helicobacter Pylori and an Inhibitor of Pump With Proton Versus Control

Inclusion Criteria: * Patients of more than 18 years old * Coronarography or coronary imaging or supra-aortic arterial trunks ultrasound examination performed since less 7 months and having at least an arterial vascular stenosis * Indication for aspirin treatment for at least 12 months (at the moment of the visit of inclusion) at a posology from 80 to 125 mg per day. The treatment must be prescribed since less than 7 months. * Patient who had since less 7 month a positive Helicobacter Pylori serology. * For the women in age to procreate, effective mode of contraception (oral contraception, surgical sterilization, coil) * Patient having given an informed consent according to recommendation of the CPP (institutional ethical committee). Exclusion Criteria: * treatment by anti-coagulant, whatever its nature and its posology, by proton pump inhibitor, H2 receptor antagonists or antiacid having to be continued beyond the day of inclusion * Treatment by methotrexate in progress or stopped since less 3 months. * Time of more 7 months enters the beginning of the treatment by aspirin and the visit of inclusion * Treatment by NSAID (even occasional or self medication) under or stopped since less 3 months. * Treatment by anti-platelet drug (clopidogrel, ticlopidine, flurbiprofen, dipyridamole or antagonist of receptor GPIIb/IIIa) in progress or stopped since less than 10 days. * Patient with a serious pathology compromising survival in the 6 month to come. * Patient with renal or respiratory insufficiency or a hepatic pathology having a clinical repercussion. * History of surgery of esophagus, stomach or duodenum. * History of digestive tract bleeding or gastro-duodenal ulcer or esophagal ulcerating proven by endoscopy. * Allergy known to clarithromycin. * Psychiatric disorder not controlled by treatment. * Patients all ready include in a therapeutic protocol or to be followed for 6 month. * Alcohol consumption higher than 100gr. per day. * Patient non suitable for participating in the protocol or to be followed for 6 month. * History of intolerance to salicylate. * Constitutional or acquired hemorrhagic disease * Pregnant woman or nursing. * Patient in emergency, people hospitalized without their assent, people without freedom, people without social health insurance.