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Related Concept Videos

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 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...
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...

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Updated: Jun 21, 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

Predicting and preventing stroke after transient ischemic attack.

Lonneke M L de Lau1, Heleen M den Hertog, Evita G van den Herik

  • 1Department of Neurology, Erasmus Medical Center, Rotterdam, 3000 CA Rotterdam, The Netherlands. l.delau@erasmusmc.nl

Expert Review of Neurotherapeutics
|August 14, 2009
PubMed
Summary

Transient ischemic attacks (TIAs) carry a significant early stroke risk, necessitating prompt evaluation and treatment. Even nonfocal transient attacks indicate increased vascular disease risk, requiring further research into management strategies.

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Transient Middle Cerebral Artery Occlusion Model of Stroke
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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
06:01

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Published on: August 18, 2015

Transient Middle Cerebral Artery Occlusion Model of Stroke
05:32

Transient Middle Cerebral Artery Occlusion Model of Stroke

Published on: August 11, 2023

Area of Science:

  • Neurology
  • Vascular Medicine
  • Public Health

Background:

  • Transient ischemic attacks (TIAs) were previously considered to have a favorable prognosis, but recent evidence suggests a higher risk of subsequent stroke.
  • A notable ~10% risk of stroke occurs within the first week post-TIA, underscoring the need for urgent medical intervention.
  • Transient attacks with nonfocal symptoms are now recognized as indicators of increased vascular disease risk, though their full implications remain unclear.

Purpose of the Study:

  • To highlight the evolving understanding of TIA prognosis and the critical need for timely intervention.
  • To discuss the role of risk prediction scores in guiding acute management decisions for TIA patients.
  • To emphasize the importance of secondary prevention strategies and explore emerging research on lifestyle factors.

Main Methods:

  • Review of clinical trial evidence on TIA prognosis and secondary prevention.
  • Analysis of emerging data on risk prediction scores for early stroke risk stratification.
  • Examination of research on the association between nonfocal transient attacks and vascular disease.

Main Results:

  • The prognosis of TIAs is less favorable than previously assumed, with a substantial early stroke risk.
  • Risk prediction scores are being developed to aid in acute treatment decisions.
  • Nonfocal transient attacks are linked to increased vascular disease risk, necessitating further investigation.

Conclusions:

  • Urgent evaluation and treatment are crucial following a TIA due to the high early stroke risk.
  • Secondary prevention therapies are effective in reducing stroke risk post-TIA.
  • Further research is needed to clarify the implications of nonfocal transient attacks and the role of lifestyle modifications in TIA management.