Continuous Clopidogrel Dose Adjustment in Acute Coronary Syndrome Patients With High On-treatment Platelet Reactivity

"Patients in the interventional arm will receive clopidogrel dose adjustment to maintain optimal platelet reactivity determined by Multiplate function analyzer (19-46U).~They will undergo platelet function testing on day 1,2,3,7,30 and month 2,3,6,9 and 12.~On first two measurements patients will receive up to 2 additional clopidogrel loading doses (600 mg) and put on 150 mg and 75 mg a day if platelet reactivity \>18U and \<18U, respectively. Maintenance dose will be determined on following measurements - increased by 75 mg if \>46U; not changed if 19-46U; decreased by 75 mg if \<19U. Minimal dose - 75 mg; maximal dose 300 mg (for patients \>70 years 150 mg)"