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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.
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...
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...
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...
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...

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Updated: May 25, 2026

Focal Cerebral Ischemia Model by Endovascular Suture Occlusion of the Middle Cerebral Artery in the Rat
13:50

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Published on: February 5, 2011

Classifying Ischemic Stroke, from TOAST to CISS.

Pei-Hao Chen1, Shan Gao, Yong-Jun Wang

  • 1Department of Neurology, Mackay Memorial Hospital, Taipei, Taiwan.

CNS Neuroscience & Therapeutics
|January 25, 2012
PubMed
Summary
This summary is machine-generated.

Accurate ischemic stroke classification is vital for research and patient care. This review examines current systems like TOAST, CCS, CISS, and A-S-C-O, highlighting their strengths and weaknesses for determining stroke causes.

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Area of Science:

  • Neurology
  • Clinical Medicine
  • Public Health

Background:

  • Ischemic stroke classification is essential for effective research and clinical management.
  • Accurate etiological diagnosis of stroke subtypes requires integrating clinical data, diagnostic findings, and etiological factors.

Purpose of the Study:

  • To review and evaluate existing ischemic stroke classification systems.
  • To identify the benefits and limitations of each system in determining stroke etiology.

Main Methods:

  • Literature review of published stroke classification systems.
  • Analysis of causative and phenotypic subtyping approaches.
  • Examination of the Trial of Org 10172 in acute stroke treatment (TOAST) classification and newer systems like CCS, CISS, and A-S-C-O.

Main Results:

  • Two primary approaches exist: causative and phenotypic classification.
  • The TOAST system is widely used, but newer systems (CCS, CISS) aim to improve accuracy with advanced diagnostics.
  • Phenotypic systems like A-S-C-O identify likely causes while acknowledging multiple potential etiologies.

Conclusions:

  • The ideal stroke classification system should be valid, user-friendly, evidence-based, and adaptable to new information.
  • Continuous refinement of classification systems is necessary to improve stroke diagnosis and treatment.