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Comparative inhibitory effects of cilostazol and ticlopidine on subacute stent thrombosis and platelet function in acute myocardial infarction patients with percutaneous coronary intervention.

Author(s): Kawata M, Kuramoto E, Kataoka T, Saito A, Adachi K, Matsuura A, Sakamoto S

Affiliation(s): Department of Cardiology, Akashi Medical Center, Hyogo, Japan.

Publication date & source: 2005-01, Int Heart J., 46(1):13-22.

Publication type: Clinical Trial; Randomized Controlled Trial

We compared the effects of ticlopidine and cilostazol on the prevention of subacute stent thrombosis (SAT) in acute myocardial infarction (AMI) patients with stenting. We also analyzed the cause of the difference by measuring platelet aggregation activity. Consecutive patients who underwent successful stenting for AMI between March 2001 and March 2004 were analyzed. In addition to aspirin (100 mg/day), cilostazol (200 mg/day) was administered to 99 cases between March 2001 and May 2002 and ticlopidine (200 mg/day) was administered to 85 cases between June 2002 and February 2004. The incidence of SAT within four weeks after stenting was analyzed. Thirty-eight AMI patients were randomized and their platelet aggregation activity was measured using a laser-scattered aggregometer (18 cases in the cilostazol group and 20 cases in the ticlopidine group). SAT did not occur in the ticlopidine group while 5 cases (5.1%) of SAT occurred in the cilostazol group (P < 0.05). The inhibitory activity of cilostazol for ADP-induced platelet aggregation was lower than that of ticlopidine (P < 0.05). Cilostazol with aspirin after stenting in AMI patients showed more frequent SAT than ticlopidine with aspirin. One of the causes for this difference was speculated to be the weaker inhibitory activity of cilostazol for ADP-induced platelet aggregation.

Page last updated: 2006-01-31

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