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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...
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...
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...
Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
Esophageal Varices-II: Clinical Features and Management01:28

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Esophageal varices often manifest as gastrointestinal bleeding episodes, presenting symptoms like hematemesis (vomiting of blood), hematochezia (passing fresh blood via the rectum), and melena (black, tarry stools). Other signs can include weight loss, anorexia, abdominal discomfort, jaundice, pruritus, altered mental status, and muscle cramps.
In the initial assessment, a thorough review of the patient's medical history is vital to identify risk factors such as liver disease, alcohol abuse, or...
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...

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Related Experiment Video

Updated: May 16, 2026

Sub-acute Cerebral Microhemorrhages Induced by Lipopolysaccharide Injection in Rats
06:39

Sub-acute Cerebral Microhemorrhages Induced by Lipopolysaccharide Injection in Rats

Published on: October 17, 2018

[Cerebral microbleeds: clinical features and management].

Yusuke Yakushiji1, Hideo Hara

  • 1Division of Neurology, Department of Internal Medicine, Saga University Faculty of Medicine.

Rinsho Shinkeigaku = Clinical Neurology
|December 1, 2012
PubMed
Summary

Cerebral microbleeds (CMBs) are key indicators of small vessel disease (SVD) and are not silent. Detecting CMBs signals potential SVD and risks, urging medical attention for blood pressure and antithrombotic drug management.

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

Published on: April 23, 2021

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Last Updated: May 16, 2026

Sub-acute Cerebral Microhemorrhages Induced by Lipopolysaccharide Injection in Rats
06:39

Sub-acute Cerebral Microhemorrhages Induced by Lipopolysaccharide Injection in Rats

Published on: October 17, 2018

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

Area of Science:

  • Neurology
  • Radiology
  • Pathology

Context:

  • Cerebral microbleeds (CMBs) are increasingly recognized as a manifestation of cerebral small vessel disease (SVD).
  • CMBs are histologically characterized by hemosiderin deposits around cerebral microvessels.
  • They are frequently observed in patients with stroke, Alzheimer's disease, and mild cognitive impairment.

Purpose:

  • To highlight the clinical significance of cerebral microbleeds (CMBs) in the context of small vessel disease (SVD).
  • To differentiate the pathological origins of CMBs based on their distribution (deep vs. lobar).
  • To emphasize that CMBs are not clinically silent and serve as warning signs.

Summary:

  • CMBs, visible on MRI, indicate SVD pathologies like hypertensive arteriopathy and cerebral amyloid angiopathy (CAA).
  • Deep CMBs are linked to hypertension, while lobar CMBs are associated with CAA.
  • Both CMB types are risk factors for intracranial hemorrhage during antithrombotic therapy.

Impact:

  • CMBs serve as crucial "warning signs" for suboptimal blood pressure control and inappropriate antithrombotic drug use.
  • Identifying CMBs in healthy adults suggests the presence of subclinical SVD.
  • Future research should integrate CMBs to understand SVD's role in neurodegeneration within neurovascular units.