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Related Concept Videos

Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
Introduction Cardiac Emergencies01:30

Introduction Cardiac Emergencies

Cardiac emergencies are critical situations involving the heart that require immediate medical intervention to prevent severe complications or death. These emergencies often arise from underlying heart conditions that impair the heart's ability to function correctly.Types of Cardiac EmergenciesThe most common types of cardiac emergencies include Acute Coronary Syndrome (ACS), myocardial infarction (MI), cardiac arrest, and heart failure.Acute Coronary Syndrome (ACS)Acute Coronary Syndrome (ACS)...
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...
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...
Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...

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Related Experiment Video

Updated: May 25, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
06:01

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

[A transient ischaemic attack (TIA) is an emergency].

L J Kappelle1

  • 1Universitair Medisch Centrum Utrecht, afd. Neurologie, Huispost G03.228, Postbus 85.500, 3508 GA Utrecht. l.kappelle@umcutrecht.nl

Nederlands Tijdschrift Voor Geneeskunde
|February 1, 2008
PubMed
Summary

Rapid evaluation and treatment of transient ischaemic attacks (TIAs) significantly reduce stroke risk. Immediate referral policies, seeing patients within hours, are crucial for effective stroke prevention.

Area of Science:

  • Neurology
  • Vascular Medicine
  • Public Health

Context:

  • Established stroke prevention methods include carotid endarterectomy and medications like antiplatelets, antihypertensives, and statins.
  • Previous studies on TIA treatment often involved delays of weeks to months between the event and intervention.
  • The EXPRESS study highlighted the importance of timely intervention.

Purpose:

  • To evaluate the impact of immediate referral and treatment policies on stroke rates in patients experiencing transient ischaemic attacks (TIAs).
  • To compare stroke incidence under an immediate referral policy versus a delayed referral policy.

Summary:

  • The EXPRESS study demonstrated that an immediate referral policy for TIAs resulted in a 90-day stroke rate of 2.1%, a significant reduction compared to 10.3% with a median delay of 3 days.

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Optimized Management of Endovascular Treatment for Acute Ischemic Stroke

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Transient Middle Cerebral Artery Occlusion Model of Stroke
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Transient Middle Cerebral Artery Occlusion Model of Stroke

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Related Experiment Videos

Last Updated: May 25, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Optimized Management of Endovascular Treatment for Acute Ischemic Stroke
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Optimized Management of Endovascular Treatment for Acute Ischemic Stroke

Published on: January 18, 2018

Transient Middle Cerebral Artery Occlusion Model of Stroke
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Transient Middle Cerebral Artery Occlusion Model of Stroke

Published on: August 11, 2023

  • Similar findings were reported by a TIA service in Paris, indicating the effectiveness of prompt management.
  • Both periods in the EXPRESS study had similar baseline characteristics and delays in seeking medical attention, strengthening the conclusion.

    • Impact:

    • These findings strongly suggest that patients with TIAs require urgent examination and treatment within hours, not days, to optimize stroke prevention.
    • Implementing rapid assessment protocols can drastically improve patient outcomes and reduce the incidence of subsequent strokes.
    • The study advocates for a paradigm shift towards immediate management of TIA events.