Stent thrombosis in patients treated with thienopyridines: clinical description of 10 cases.
Subacute stent thrombosis (SAST) is a major thrombotic complication of coronary stenting. Its occurrence has been substantially reduced by thienopyridine treatment. However, information on clinical profile of patients with SAST in clopidogrel era is limited. In order to define the incidence and factors predisposing to stent thrombosis, we analyzed the computerized angiographic database of three interventional cardiology centers. Out of a total number of 5903 percutaneous coronary interventions (PCIs) with stent implantation, we found 10 patients with SAST (0.17%). The indication for PCI was usually an early invasive approach (90%) during an acute coronary syndrome. All patients were treated with an apparently optimal antithrombotic regimen (90% received heparin or LMWH and 70% received IIb/IIIa receptor inhibitors and all given aspirin). In each of the patients, we could identify high-risk angiographic findings. SAST presentation was always clinically significant with definite myocardial infarction in 100% of cases. 80% of cases occurred during the first six days post PCI. Two patients had a recurrent event. Finally, despite earlier reports of atorvastatin-mediated inhibition of clopidogrel activation we did not find any patient with SAST taking both drugs. Thus, patients with stent thrombosis during thienopyridine treatment usually exhibit high-risk angiographic features. Prospective studies should be performed to elucidate drug interactions that may reduce clopidogrel efficacy and contribute to stent thrombosis.
Michowitz
Yoav
Y
Tel Aviv Sourasky Medical Center, Israel.
Blatt
Alex
A
Frimmerman
Aaron
A
Finkelstein
Ariel
A
Massachi
Rafi
R
Herz
Itzhak
I
Krakover
Ricardo
R
Miller
Hylton
H
Keren
Gad
G
George
Jacob
J
D000368:Aged; D000789:Angina, Unstable / Q000000981:diagnostic imaging / Q000628:therapy*; D015906:Angioplasty, Balloon, Coronary; D000077144:Clopidogrel; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006083:Graft Occlusion, Vascular / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging / Q000628:therapy*; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D011859:Radiography; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D015607:Stents; D013988:Ticlopidine / Q000031:analogs & derivatives* / Q000627:therapeutic use
D010975:Platelet Aggregation Inhibitors; D000077144:Clopidogrel; D013988:Ticlopidine