Prothrombotic disorders and ischemic stroke in children

A K Chan1, G deVeber

  • 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.

Related Concept Videos

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
Disorders of Hemostasis01:24

Disorders of Hemostasis

Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
Venous Thrombosis III: Interprofessional Care01:29

Venous Thrombosis III: Interprofessional Care

Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...