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Ischemic Stroke ll: Pathophysiology

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...

Ischemic Stroke l: Introduction

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 l: Introduction

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: Pathophysiology

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...

Stroke: Introduction and Types

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...

Ischemic Heart Disease: Overview

Ischemic Heart Disease: Overview

Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and narrowing...

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Transient Middle Cerebral Artery Occlusion Model of Neonatal Stroke in P10 Rats

Transient Middle Cerebral Artery Occlusion Model of Neonatal Stroke in P10 Rats

Published on: April 21, 2017

Ischemic perinatal stroke: challenge and opportunities.

Tonse N K Raju¹

¹National Institute of Child Health and Human Development, National Institutes of Health, 6100 Executive Blvd, Bethesda, MD 20892, USA. rajut@mail.nih.gov

International Journal of Stroke : Official Journal of the International Stroke Society

|August 19, 2008

Summary

Perinatal strokes, occurring from 20 weeks gestation to 28 days post-birth, are a major risk for cerebral stroke. Ischemic perinatal stroke (IPS) is the leading cause of cerebral palsy (CP), highlighting the need for further research.

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The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

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Transient Middle Cerebral Artery Occlusion Model of Neonatal Stroke in P10 Rats

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The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

Published on: November 19, 2008

Area of Science:

Neurology
Pediatrics
Perinatal Medicine

Background:

The perinatal period (20 weeks gestation to 28 days postnatal) represents the second highest risk for cerebral stroke.
Ischemic perinatal stroke (IPS) affects 1 in 2300 to 5000 births.
IPS is identified as the most common cause of hemiplegic cerebral palsy (CP), accounting for 30% of cases.

Purpose of the Study:

To provide a concise overview of ischemic perinatal strokes.
To emphasize the significant association between IPS and cerebral palsy.
To highlight the current gaps in understanding perinatal strokes.

Main Methods:

This is a commentary, not an original research study.
It presents a brief overview of existing knowledge on ischemic perinatal strokes.
Literature review and synthesis of current data.

Main Results:

Ischemic perinatal stroke is a significant contributor to childhood neurological conditions.
The incidence of IPS is substantial within the defined perinatal period.
A considerable portion of cerebral palsy cases are linked to perinatal strokes.

Conclusions:

Ischemic perinatal stroke is a critical condition requiring further investigation.
Understanding IPS is crucial for addressing the high incidence of cerebral palsy.
More research is needed to fully elucidate the mechanisms and outcomes of perinatal strokes.