145. A patient with deep vein thrombosis (DVT) is prescribed unfractionated heparin. From a medicinal perspective, what is the technical pathophysiological mechanism of heparin?

  • Directly dissolves existing clots.
  • Enhances the activity of antithrombin, thereby inhibiting various coagulation factors (e.g., thrombin, Factor Xa).
  • Inhibits platelet aggregation.
  • Blocks Vitamin K epoxide reductase.
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