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Related Concept Videos

Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

54
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...
54
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

44
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.
44
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

18
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...
18
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

55
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...
55
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

30
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...
30
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

20
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...
20

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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
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Pediatric arterial ischemic stroke.

Mahendra Moharir, Gabrielle Deveber

    Continuum (Minneapolis, Minn.)
    |April 5, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Pediatric arterial ischemic stroke is a serious condition with high risks, often diagnosed late. Individualized management is key, but evidence-based treatments require more research.

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    Area of Science:

    • Neurology
    • Pediatrics
    • Vascular Medicine

    Background:

    • Pediatric arterial ischemic stroke (AIS) is a significant neurological disorder in children.
    • It is associated with a high rate of adverse outcomes, including recurrent stroke.
    • Diagnosis is frequently delayed or missed, especially in younger children.

    Purpose of the Study:

    • To provide a comprehensive overview of pediatric arterial ischemic stroke.
    • To cover recognition, diagnosis, and management strategies.
    • To synthesize current literature on the topic.

    Main Methods:

    • Literature review of current available studies.
    • Analysis of diagnostic challenges and imaging limitations.
    • Examination of current treatment guidelines and approaches.

    Main Results:

    • Pediatric AIS has a concerningly high rate of adverse outcomes.
    • Arteriopathies are increasingly recognized as a major cause of childhood stroke.
    • Current vascular imaging has limitations in diagnosing these arteriopathies.
    • There is significant variability in pediatric stroke treatment, necessitating individualized approaches.

    Conclusions:

    • Collaboration among pediatric stroke specialists is crucial for optimal management.
    • Evidence-based treatments are limited, highlighting the need for randomized controlled trials.
    • Further research is essential to improve outcomes for children with stroke.