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[Resistance to antivitamins K]
J M Sánchez Villegas1, J Piqueras, I Nicolau
1Servicio de Hematología y Hemoterapia, Ciudad Sanitaria Valle de Hebrón, Barcelona.
Sangre
|August 1, 1992
Summary
This case study details a woman who developed resistance to common oral anticoagulants like acenocoumarol and warfarin despite adequate drug levels. Further research into anticoagulant resistance mechanisms is warranted.
Area of Science:
- Pharmacology
- Hematology
- Clinical Medicine
Background:
- Oral anticoagulants are crucial for managing thromboembolic disorders.
- Resistance to these medications is uncommon but clinically significant.
- Deep venous thrombosis necessitates anticoagulation therapy.
Observation:
- A 32-year-old woman with deep venous thrombosis required anticoagulation.
- She progressively developed resistance to acenocoumarol and warfarin.
- High-performance liquid chromatography confirmed adequate acenocoumarol plasma concentrations.
Findings:
- Therapeutic anticoagulation goals were not met despite sufficient drug levels.
- This suggests a complex mechanism underlying the observed resistance.
- The case highlights potential challenges in managing anticoagulant therapy.
Implications:
- Understanding anticoagulant resistance mechanisms is vital for treatment optimization.
- Further investigation into genetic or acquired factors influencing drug efficacy is needed.
- This case underscores the importance of monitoring treatment response beyond plasma drug concentrations.