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| {{Thrombosis}}
| | #Redirect [[venous thromboembolism]] |
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| {{DiseaseDisorder infobox |
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| Name = Venous thrombosis |
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| ICD10 = {{ICD10|I|80||i|80}}-{{ICD10|I|82||i|80}} |
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| ICD9 = {{ICD9|453}} |
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| }}
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| {{WikiDoc Cardiology Network Infobox}}
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| {{Search infobox}}
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| {{CMG}}
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| ==Overview==
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| A '''venous thrombosis''' is a [[blood clot]] that forms within a [[vein]].
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| '''Thrombus''' is term for a blood clot that remains in the place where it formed. ''Superficial venous thromboses'' can cause discomfort but generally do not cause serious consequences, unlike the ''[[deep venous thrombosis|deep venous thromboses]]'' (DVTs) that form in the deep veins of the legs or in the pelvic veins.
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| Since the veins return [[blood]] to the [[heart]], if a piece of a blood clot formed in a vein breaks off it can be transported to the right side of the heart, and from there into the [[lung]]s. A piece of thrombus that is transported in this way is an ''[[embolism]]'': the process of forming a thrombus that becomes embolic is called a ''thromboembolism''. An embolism that lodges in the lungs is a ''[[pulmonary embolism]]'' (PE). Deep venous thrombosis (DVT) and pulmonary embolism (PE) are manifestations of a single disease entity, namely, [[venous thromboembolism]] (VTE).
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| Systemic embolisms of venous origin can occur in patients with an [[Atrial septal defect|atrial]] or [[Ventricular septal defect|ventricular]] septal defect, through which an embolus may pass into the arterial system. This is termed a '''''paradoxical emboli'''''.
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| A pulmonary embolus is a very serious condition that can be fatal if not recognized and treated promptly.
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| ==Risk factors==
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| *'''General'''
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| **Older age
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| **Female gender
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| **[[Smoking]]
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| **[[Obesity]]
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| **[[Pregnancy]]
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| **Immobilisation
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| *'''Medical'''
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| **Surgery
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| **[[Trauma]]
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| **[[Oral contraceptive]] use
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| **[[Varicose vein]]s
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| **[[Malignancy]]
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| **Kidney disorders
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| **[[Lupus anticoagulant]]
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| **[[Paroxysmal nocturnal hemoglobinuria]]
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| **[[Inflammatory bowel disease]]
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| **[[Thromboangiitis obliterans]]
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| **[[Disseminated intravascular coagulation]]
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| *'''Familial'''
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| **[[Antithrombin|Antithrombin III deficiency]]
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| **[[Protein C deficiency]]/[[Protein S deficiency]]
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| **APC resistance ([[Factor V Leiden]])
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| **Dysfibrogenemia
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| **Hypoplasminogenemia
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| **Familial homocysteinemia
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| ==See also==
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| * [[Arterial thrombosis]]
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| * [[venous thromboembolism]]
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| * [[Deep vein thrombosis]]
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| * [[Pulmonary embolism]]
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| * [[Portal vein thrombosis]]
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| * [[Plethysmography]], a test to detect a venous thrombosis
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| {{Circulatory system pathology}}
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| {{SIB}}
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| [[Category:Hematology]]
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| [[Category:Cardiology]]
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| [[ja:静脈血栓塞栓症]]
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| [[pt:Trombose venosa]]
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