Impact of Clopidogrel Dose Adjustment According to Platelet Reactivity Monitoring in Patients With High on Treatment Platelet Reactivity Undergoing Percutaneous Coronary Intervention

60 mg the first day then 10 mg per day during one month

"600 mg clopidogrel will be administered during the first 6 to 12 hours then a measure of platelets reactivity will be done. An additional administration of clopidogrel (600 mg) could be done every 6 hours until to obtain a VASP \<50%. No more than 3 \* 600mg of clopidogrel will be authorized in this protocol.~Then for patient which have received more than one dose of clopidogrel 600mg , 150 mg per day of clopidogrel will be administrated, for which who have received only one dose of 600mg of clopidogrel , 75 mg per day will be administrated during one month at least."