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Related Concept Videos

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.
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...
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants

Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
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...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
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...

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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
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Published on: August 18, 2015

[Ischemic stroke under anticoagulant therapy].

Yasuteru Inoue1, Yuichiro Inatomi, Toshiro Yonehara

  • 1Stroke Center, Saiseikai Kumamoto Hospital.

Rinsho Shinkeigaku = Clinical Neurology
|August 5, 2010
PubMed
Summary
This summary is machine-generated.

Maintaining therapeutic anticoagulation levels in stroke patients may reduce recurrence and improve outcomes, particularly for those with a history of cardioembolic stroke. This finding aids in predicting prognosis for acute ischemic stroke patients.

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Area of Science:

  • Neurology
  • Cardiology
  • Pharmacology

Context:

  • Acute ischemic stroke management requires understanding recurrence predictors.
  • Anticoagulant therapy effectiveness varies among stroke subtypes.
  • Japanese stroke guidelines (2004) define therapeutic ranges for anticoagulation.

Purpose:

  • To identify factors predicting stroke recurrence during anticoagulation.
  • To estimate prognosis in acute ischemic stroke patients on anticoagulant therapy.
  • To compare outcomes between therapeutic and sub-therapeutic anticoagulation ranges.

Summary:

  • Retrospective analysis of 197 acute ischemic stroke patients compared outcomes within and below therapeutic anticoagulation ranges.
  • Therapeutic range group showed fewer cardioembolic strokes (61% vs 77%) and more lacunar strokes (17% vs 6%).
  • Patients with prior cardioembolic stroke history had better functional outcomes (Barthel Index, modified Rankin Scale) in the therapeutic range group.

Impact:

  • Adequate anticoagulation may prevent thrombogenesis and promote early recanalization.
  • Findings suggest improved prognosis for cardioembolic stroke patients with optimal anticoagulation.
  • Highlights the importance of maintaining therapeutic anticoagulation levels for stroke patient management.