title: Parameters of the tissue factor pathway with coumadin/dipyridamole versus ticlopidine as adjunct antithrombotic-drug regimen in coronary artery stenting.
abstract: A different rate and timing of subacute stent thrombosis after percutaneous coronary intervention was reported with various peri-interventional antithrombotic regimens. Next to platelet activation, coagulation triggered by tissue factor (TF) may play a key role in this process. Thirty-one consecutive patients with stable and unstable angina undergoing coronary stenting were randomly assigned to adjunct oral anticoagulation/anti-platelet therapy (coumadin, dipyridamole, aspirin and heparin; n = 16) or adjunct anti-platelet therapy with thienopyridin (ticlopidine, aspirin and heparin; n = 15). Antigen levels of plasma TF, total tissue factor pathway inhibitor (TFPI) and TFPI/ activated factor X (TFPI/FXa) complex were determined before and for up to 6 days after intervention by immunoassay. At baseline, significantly higher levels of plasma TF and TFPI/FXa were found in patients with unstable angina [TF, 161 pg/ml (126-191 pg/ml); TFPI/FXa, 7.8 ng/ml (6.1-9.6 ng/ml)] compared with stable angina [TF, 62 pg/ml (46-82 pg/ml), P < 0.0001; TFPI/FXa, 4.5 ng/ml (3-7.6 ng/ml), P= 0.003]. One hour after intervention, an increase of plasma TF and TFPI/FXa was seen in both treatment groups. In unstable angina patients, plasma levels of TF, TFPI and TFPI/FXa were more efficiently reduced by adjunct ticlopidine therapy compared with adjunct coumadin/dipyridamole. These data suggest reduced release of circulating TF by combined anti-platelet therapy with ticlopidine and aspirin after coronary artery stenting, which may-contribute to the lower incidence of subacute stent thrombosis previously observed.
authors.affiliation: Division of Angiology, 2nd Department of Medicine, General Hospital, AKH, University of Vienna, Austria. christoph.kopp@univie.ac.at
authors.forename: Christoph W
authors.initials: CW
authors.lastname: Kopp
authors.forename: Sabine
authors.initials: S
authors.lastname: Steiner
authors.forename: Ute
authors.initials: U
authors.lastname: Priglinger
authors.forename: Guenter
authors.initials: G
authors.lastname: Christ
authors.forename: Peter
authors.initials: P
authors.lastname: Probst
authors.forename: Gerald
authors.initials: G
authors.lastname: Maurer
authors.forename: Erich
authors.initials: E
authors.lastname: Minar
authors.forename: Kurt
authors.initials: K
authors.lastname: Huber
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000097:blood / Q000188:drug therapy / Q000378:metabolism; D000789:Angina, Unstable / Q000097:blood / Q000188:drug therapy / Q000378:metabolism; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects / Q000379:methods; D000925:Anticoagulants / Q000008:administration & dosage / Q000627:therapeutic use*; D001241:Aspirin / Q000008:administration & dosage / Q000627:therapeutic use; D017023:Coronary Angiography; D023921:Coronary Stenosis / Q000097:blood / Q000150:complications / Q000628:therapy*; D004176:Dipyridamole / Q000008:administration & dosage / Q000627:therapeutic use; D004305:Dose-Response Relationship, Drug; D004359:Drug Therapy, Combination; D004797:Enzyme-Linked Immunosorbent Assay; D015951:Factor Xa / Q000378:metabolism; D005260:Female; D005500:Follow-Up Studies; D006470:Hemorrhage / Q000209:etiology; D006493:Heparin / Q000008:administration & dosage / Q000627:therapeutic use; D006801:Humans; D008074:Lipoproteins / Q000097:blood; D008297:Male; D008875:Middle Aged; D013223:Statistics as Topic; D015607:Stents; D013925:Thromboplastin / Q000378:metabolism*; D013927:Thrombosis / Q000209:etiology; D013988:Ticlopidine / Q000008:administration & dosage / Q000627:therapeutic use; D013997:Time Factors; D014859:Warfarin / Q000008:administration & dosage / Q000627:therapeutic use
chemical_list: D000925:Anticoagulants; D008074:Lipoproteins; C051928:lipoprotein-associated coagulation inhibitor; D014859:Warfarin; D004176:Dipyridamole; D006493:Heparin; D013925:Thromboplastin; D015951:Factor Xa; D013988:Ticlopidine; D001241:Aspirin