What is the primary mechanism of action of Unfractionated Heparin (UFH)?
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Correct answer: Binds antithrombin III to inhibit Thrombin and Xa
Heparin acts as a biological catalyst that binds to antithrombin III, increasing its ability to neutralize thrombin (IIa) and Factor Xa by nearly 1000-fold. This prevents the conversion of fibrinogen to fibrin.
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