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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...
Ischemic Heart Disease: Overview01:17

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...
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...
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...

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Related Experiment Video

Updated: Jul 11, 2026

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability
09:11

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability

Published on: February 23, 2016

Racial differences in ischemic cerebrovascular disease.

R Singh1, S N Cohen, R Krupp

  • 1Department of Neurology, West Los Angeles Veterans Affairs Medical Center, Los Angeles, CA, USA.

Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association
|September 27, 2007
PubMed
Summary

Racial differences in cerebrovascular disease show Caucasians have higher risks of cardiac issues and hypertriglyceridemia. African-Americans experienced more lacunar strokes, indicating varied disease patterns.

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Last Updated: Jul 11, 2026

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability
09:11

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability

Published on: February 23, 2016

A Rat Model of Middle Cerebral Artery Occlusion/Reperfusion Without Damaging the Anatomical Structure of Cerebral Vessels
06:10

A Rat Model of Middle Cerebral Artery Occlusion/Reperfusion Without Damaging the Anatomical Structure of Cerebral Vessels

Published on: May 17, 2024

Area of Science:

  • Neurology
  • Cardiology
  • Vascular Medicine

Background:

  • Conflicting data exists regarding racial disparities in vascular risk factors and stroke subtypes.
  • Understanding these differences is crucial for targeted prevention and treatment strategies.

Purpose of the Study:

  • To investigate racial variations in extracranial carotid atherosclerosis.
  • To evaluate differences in vascular risk factors among patients with symptomatic cerebrovascular disease across racial groups.

Main Methods:

  • Prospective study of 211 patients (71 African-American, 114 Caucasian, 20 Hispanic) admitted for stroke.
  • Carotid duplex (CD) scans assessed extracranial vascular stenosis.
  • Monitored risk factors included race, hypertension (HTN), diabetes mellitus (DM), prior stroke, hyperlipidemia, smoking, and cardiac disease.

Main Results:

  • Caucasians showed higher rates of hypertriglyceridemia and cardiac disease.
  • African-Americans had more frequent lacunar infarcts and a trend towards more hypertension and prior stroke.
  • No significant racial differences were observed in diabetes mellitus, abnormal cholesterol levels, or smoking history.

Conclusions:

  • Caucasians with cerebrovascular disease face higher risks of cardiac disease and hypertriglyceridemia.
  • African-Americans exhibit a higher prevalence of lacunar strokes, consistent with previous research.
  • Trends suggest potential racial differences in hypertension and prior stroke, warranting further investigation.