Inter-relationship among individual vitamin K-dependent clotting factors at different levels of anticoagulation. 1987

E Chan, and L Aarons, and M Serlin, and A Breckenridge, and M Rowland
Pharmacokinetics Department, University of Manchester.

1. The effect of subtherapeutic doses of warfarin on the activities of the four vitamin K-dependent clotting factors was studied at steady state in five patients each of whom had completed a therapeutic course of anticoagulation. 2. The four clotting factor activities were shown to be depressed to a similar extent for a given dose of warfarin. 3. The prothrombin complex activity was significantly lower than that of any of the clotting factors.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011517 Prothrombin Time Clotting time of PLASMA recalcified in the presence of excess TISSUE THROMBOPLASTIN. Factors measured are FIBRINOGEN; PROTHROMBIN; FACTOR V; FACTOR VII; and FACTOR X. It is used for monitoring anticoagulant therapy with COUMARINS. Quick Test,Russell's Viper Venom Time,Thrombotest,Russell Viper Venom Time,Russells Viper Venom Time,Prothrombin Times,Test, Quick,Time, Prothrombin,Times, Prothrombin
D001777 Blood Coagulation The process of the interaction of BLOOD COAGULATION FACTORS that results in an insoluble FIBRIN clot. Blood Clotting,Coagulation, Blood,Blood Clottings,Clotting, Blood
D001779 Blood Coagulation Factors Endogenous substances, usually proteins, that are involved in the blood coagulation process. Clotting Factor,Coagulation Factors,Blood Coagulation Factor,Clotting Factors,Coagulation Factor,Coagulation Factor, Blood,Coagulation Factors, Blood,Factor, Coagulation,Factors, Coagulation,Factor, Blood Coagulation,Factor, Clotting,Factors, Blood Coagulation,Factors, Clotting
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D014812 Vitamin K A lipid cofactor that is required for normal blood clotting. Several forms of vitamin K have been identified: VITAMIN K 1 (phytomenadione) derived from plants, VITAMIN K 2 (menaquinone) from bacteria, and synthetic naphthoquinone provitamins, VITAMIN K 3 (menadione). Vitamin K 3 provitamins, after being alkylated in vivo, exhibit the antifibrinolytic activity of vitamin K. Green leafy vegetables, liver, cheese, butter, and egg yolk are good sources of vitamin K.
D014859 Warfarin An anticoagulant that acts by inhibiting the synthesis of vitamin K-dependent coagulation factors. Warfarin is indicated for the prophylaxis and/or treatment of venous thrombosis and its extension, pulmonary embolism, and atrial fibrillation with embolization. It is also used as an adjunct in the prophylaxis of systemic embolism after myocardial infarction. Warfarin is also used as a rodenticide. 4-Hydroxy-3-(3-oxo-1-phenylbutyl)-2H-1-benzopyran-2-one,Aldocumar,Apo-Warfarin,Coumadin,Coumadine,Gen-Warfarin,Marevan,Tedicumar,Warfant,Warfarin Potassium,Warfarin Sodium,Potassium, Warfarin,Sodium, Warfarin

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