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[Etiology of deep venous thrombosis of the leg]
E Pilger1, A Obernosterer, G Stark
1Medizinischen Universitätsklinik, Karl-Franzens-Universität Graz.
Insights
Deep venous thrombosis (DVT) often co-occurs with other diseases, complicating its cause. Identifying the precise etiological factors for DVT remains challenging, extending beyond Virchow's triad.
Area of Science:
- Vascular Medicine
- Hematology
- Pathophysiology
Context:
- Deep venous thrombosis (DVT) affects 50% of patients with co-existing diseases that may promote thrombogenesis.
- In the remaining 50% of DVT cases, no clear etiological factor is identified.
- Predisposing factors like immobilization, surgery, advanced age, and estrogen treatment are recognized as risk factors, not definitive causes.
Purpose:
- To explore the complex multifactorial etiology of deep venous thrombosis (DVT).
- To differentiate between risk factors and etiological factors in DVT.
- To highlight the intricate interplay of physiological systems involved in venous thrombosis initiation.
Summary:
- DVT etiology is complex, with 50% of cases linked to concurrent diseases and 50% idiopathic.
- Traditional risk factors (immobilization, age, estrogen) do not fully explain DVT causation.
- Venous thrombosis initiation requires disruption of a complex balance involving multiple systems beyond Virchow's triad (hypercoagulability, stasis, endothelial lesion).
Impact:
- Enhances understanding of DVT pathophysiology beyond established risk factors.
- Informs clinical approaches to DVT diagnosis and management by considering multifactorial origins.
- Provides a foundation for further research into the complex etiological pathways of venous thromboembolism.
Abstract:
50% of all patients with deep venous thrombosis (DVT) are simultaneously suffering from other diseases, which might support or cause the thrombogenesis. In the other 50% no etiological factor can be identified. There are several factors predisposing to DVT, such as immobilisation, surgery, old age of the patient, estrogen treatment. These factors are risk factors but not etiological factors. DVT is not only initiated by the three main factors (hypercoagulability, stasis, endothelial lesion) already described by Virchow. A very complicated balance of several complex single systems (endothelium, vessel wall motion, thrombocytes, hemostatic and fibrinolytic systems with their inhibitors) has to be disturbed in order to initiate venous thrombosis.