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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
Prothrombotic disorders and ischemic stroke in children
1University of Toronto, Department of Paediatrics, Hospital for Sick Children, Ontario, Canada.
Insights
Childhood stroke, including arterial ischemic stroke and sinovenous thrombosis, is often linked to prothrombotic disorders. Screening children with stroke for these conditions is crucial for prevention and understanding causes.
Area of Science:
- Pediatric Neurology
- Hematology
- Vascular Medicine
Background:
- Childhood stroke, encompassing arterial ischemic stroke (AIS) and sinovenous thrombosis (SVT), is uncommon but severe.
- Understanding the causes of pediatric stroke is vital for developing prevention strategies.
- Prothrombotic disorders are implicated in the etiology of childhood stroke.
Purpose of the Study:
- To review the role of prothrombotic disorders in childhood ischemic stroke.
- To highlight the incidence of these disorders in pediatric AIS and SVT.
- To recommend screening for prothrombotic disorders in children with stroke.
Main Methods:
- Literature review of studies on childhood stroke and prothrombotic disorders.
- Analysis of reported incidences of specific prothrombotic conditions.
- Synthesis of current understanding regarding the contribution of these disorders to stroke etiology.
Main Results:
- Prothrombotic disorders are found in 20-50% of childhood AIS and 33-99% of childhood SVT.
- Identified disorders include deficiencies in antithrombin, protein C, S, plasminogen, Factor V Leiden, Prothrombin gene mutations, dysfibrinogenemia, antiphospholipid antibodies, hyperhomocysteinemia, and elevated lipoprotein (a).
- Other contributing factors include hyperlipidemia, polycythemia, iron deficiency anemia, and platelet disorders.
Conclusions:
- Prothrombotic disorders are prevalent in children with stroke and likely play a causative role.
- Screening for these disorders in pediatric stroke patients is recommended.
- Further research is needed to define the exact contribution of specific disorders and optimize treatment.
Abstract:
Childhood ischemic stroke, including arterial ischemic stroke (AIS) and sinovenous thrombosis (SVT), is relatively rare in children but can result in devastating morbidity and mortality. An understanding of the etiology of childhood stroke is important because strategies for primary and secondary prevention can be devised. Prothrombotic disorders may contribute to the etiology of childhood stroke, and include deficiencies of antithrombin, protein C, protein S, plasminogen, and presence of Factor V Leiden, Prothrombin gene G20210A, dysfibrinogenemia, antiphospholipid antibodies, hyperhomocysteinemia, and elevated lipoprotein (a). The overall incidence of prothrombotic disorders in childhood AIS is estimated to be 20% to 50% in most studies and, in childhood SVT, to be 33% to 99%. In addition, hyperlipidemia, polycythemia, iron deficiency anemia, and platelet disorders may result in a prothrombotic state associated with ischemic stroke. The etiologic contribution of these prothrombotic disorders to initial and recurrent stroke has not been clearly defined; however, additional risk factors are usually present in affected children. Given the prevalence of prothrombotic disorders in childhood stroke, and their likely causative role, children with stroke should be screened for prothrombotic disorders. Future prospective and multicenter studies will elucidate the contribution of specific prothrombotic disorders to initial and recurrent stroke, and optimal therapy.
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