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Related Concept Videos

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...
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...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...

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Related Experiment Video

Updated: May 18, 2026

Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
07:30

Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions

Published on: April 23, 2021

Cerebral microbleeds: do they really predict macrobleeding?

Meike W Vernooij1

  • 1Department of Radiology, Erasmus University Medical Center, 's-Gravendijkwal 230, Rotterdam 3015 CE, The Netherlands. m.vernooij@erasmusmc.nl

International Journal of Stroke : Official Journal of the International Stroke Society
|September 20, 2012
PubMed
Summary
This summary is machine-generated.

Microbleeds are linked to major bleeding events in some patients. More research is needed in general populations to understand which individuals with microbleeds are at higher risk for macrobleeding.

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Last Updated: May 18, 2026

Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
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Published on: April 23, 2021

Sub-acute Cerebral Microhemorrhages Induced by Lipopolysaccharide Injection in Rats
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Published on: October 17, 2018

Assessing Cortical Cerebral Microinfarcts on High Resolution MR Images
08:39

Assessing Cortical Cerebral Microinfarcts on High Resolution MR Images

Published on: November 20, 2015

Area of Science:

  • Neurology
  • Vascular Medicine

Background:

  • Growing evidence links cerebral microbleeds to macrobleeding in specific patient groups.
  • Prospective data in unselected populations regarding this association are limited.

Purpose of the Study:

  • To investigate the relationship between microbleeds and macrobleeding in unselected populations.
  • To identify factors contributing to the progression from microbleeds to symptomatic intracerebral hemorrhage.

Main Methods:

  • The study design is prospective, focusing on unselected individuals.
  • Analysis considers the presence, location, and number of microbleeds.

Main Results:

  • The prevalence of microbleeds is high, while symptomatic intracerebral hemorrhage incidence is relatively low.
  • A specific subgroup of individuals with microbleeds may be at increased risk for macrobleeding.

Conclusions:

  • The severity and nature of underlying vascular pathology likely influence the risk of macrobleeding.
  • Future longitudinal studies should examine microbleed characteristics (location, number) in addition to presence.