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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.
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...
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...
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...
Atherosclerosis II: Clinical Manifestations and Diagnostic Tests01:27

Atherosclerosis II: Clinical Manifestations and Diagnostic Tests

Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
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...

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Related Experiment Video

Updated: Jul 11, 2026

Transient Middle Cerebral Artery Occlusion Model of Stroke
05:32

Transient Middle Cerebral Artery Occlusion Model of Stroke

Published on: August 11, 2023

Leukoaraiosis and stroke outcome.

Anna Podgorska1, Daniel B Hier, Andrzej Pytlewski

  • 1Second Department of Neurology, Institute of Psychiatry and Neurology, Warsaw, Poland.

Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association
|October 2, 2007
PubMed
Summary

Leukoaraiosis, a condition affecting white matter in the brain, is linked to poorer cognitive function and survival outcomes in stroke patients within one year. This finding highlights its significance in stroke prognosis.

Related Experiment Videos

Last Updated: Jul 11, 2026

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
  • Radiology
  • Geriatrics

Background:

  • Leukoaraiosis is a common finding in neuroimaging, particularly in older adults.
  • Its impact on long-term stroke prognosis remains an area of active research.
  • Understanding these associations is crucial for patient management and risk stratification.

Purpose of the Study:

  • To investigate the influence of leukoaraiosis on the prognosis of stroke patients.
  • To evaluate the association between leukoaraiosis and cognitive function, mortality, and stroke recurrence.
  • To determine if leukoaraiosis is an independent predictor of stroke outcomes.

Main Methods:

  • Prospective observational study of 370 consecutive stroke patients over 1 year.
  • Data collection using a standardized questionnaire based on the Stroke Data Bank.
  • Statistical analysis performed using SPSS, comparing outcomes between subjects with and without leukoaraiosis.

Main Results:

  • Leukoaraiosis was present in 17.6% of subjects and associated with older age.
  • While 30-day fatality rates were similar, 1-year fatality was higher in the leukoaraiosis group.
  • Mini-Mental State Examination (MMSE) scores were significantly lower at 30 days and 1 year in subjects with leukoaraiosis.

Conclusions:

  • Leukoaraiosis is an adverse predictor of cognitive functioning at 30 days and 1 year post-stroke.
  • Leukoaraiosis is an adverse predictor of survival at 1 year following stroke.
  • Leukoaraiosis did not predict stroke recurrence within the first year.