Tag: Ptt

Heparin, a fast-acting anticoagulant, is widely used to prevent and treat blood clots. Unlike the oral anticoagulant warfarin, it does not require monitoring via the International Normalized Ratio (INR), leading many to question: Does heparin affect PT or PTT? The answer lies in its specific mechanism of action within the body's complex coagulation cascade.

According to the American Heart Association, unfractionated heparin therapy is typically monitored using the activated partial thromboplastin time (aPTT), not the International Normalized Ratio (INR). This article clarifies **does heparin affect inr or PTT**, and why the distinction is crucial for safe anticoagulation management.