Related Experiment Video
Updated: Jul 6, 2026

Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood
Published on: October 12, 2012
Lupus anticoagulant syndrome: a case report
Tara Khan1, Olivia Lopez, Robert Birkhahn
1Department of Emergency Medicine, New York Methodist Hospital, Brooklyn, New York 11215, USA.
Insights
Deep vein thrombosis (DVT) can stem from hypercoagulable states like antiphospholipid antibody syndrome (APS). Recognizing and treating thrombotic events in APS patients is crucial for effective management.
Area of Science:
- Hematology
- Immunology
- Vascular Medicine
Background:
- Deep vein thrombosis (DVT) requires physician familiarity for recognition and management.
- Hypercoagulable states are significant contributors to DVT development, particularly in upper extremities.
- Antiphospholipid antibody syndrome (APS) is a hypercoagulable state characterized by autoantibodies against anionic phospholipid complexes.
Observation:
- In vivo, APS autoantibodies induce a hypercoagulable state via proposed mechanisms.
- In vitro, these antibodies inhibit coagulation by interfering with phospholipid complex assembly, prolonging clotting times.
- Patients with APS present a paradox: appearing anticoagulated in vitro but existing in a pro-thrombotic state.
Findings:
- APS patients are in a pro-thrombotic state despite in vitro anticoagulation.
- Effective management requires anticoagulants such as heparin and warfarin.
- This discussion emphasizes recognizing and treating thrombotic events within the context of APS.
Implications:
- Enhanced understanding of APS is vital for accurate diagnosis and treatment of thrombosis.
- Physicians must consider APS in patients with unexplained or recurrent thrombotic events.
- Timely and appropriate anticoagulation therapy is essential for managing APS-related thrombotic risks.
Abstract:
Thromboses of the deep veins (DVT) and potential complications are disorders with which physicians need to be well familiarized so they can be recognized and managed. Hypercoagulable states play a significant role in the development of DVT and these disorders must be suspect when thrombosis occurs, especially in the upper extremities. Antiphospholipid antibody syndrome (APS) is one such hypercoagulable state in which autoantibodies are formed against anionic phospholipid complexes. In vivo, these antibodies cause a hypercoagulable state through a number of proposed mechanisms, whereas in vitro they interfere with the assembly of phospholipid complexes, thereby inhibiting coagulation and prolonging various clotting times. Though appearing to be anticoagulated on ancillary testing, patients with APS are actually in a pro-thrombotic state requiring treatment with the anticoagulants heparin and warfarin. This case discussion focuses on the recognition and treatment of thrombotic events in the setting of APS.
Related Concept Videos
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Venous Thrombosis I: Introduction
Endocarditis II: Clinical Features of Infective Endocarditis
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies