USMLE Step 1 Quiz
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PHARMACOLOGY
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During a cardiac bypass procedure, a patient receives a large dose of unfractionated heparin. After the procedure, he has significant bleeding from his chest tube. The surgeon decides to reverse the anticoagulation. An intravenous infusion of protamine sulfate is administered.
Which of the following describes the mechanism by which protamine sulfate reverses the effects of heparin?
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