 This is a prospective and open study. We will include 29 patients with chronic CAD, stable, using ASA. All patients will receive the same medications in effective doses recommended at each stage of the study, so that every individual is his self-control, the Enoxaparin will be administrated at a dose of 1mgkg twice a day and Dabigatran at a dose of 150mg twice a day. Study Design: Phase 1 : There will be a first collection of blood samples from all patients at baseline for laboratory tests, then the patient will receive Dabigatran for 5 days and laboratory tests including platelet aggregation will be made, among others. After a 30 days washout period, enoxaparin will be administrated for 5 days and in the 6st day, the same laboratory tests, including platelet aggregation, will be performed. 