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Related Concept Videos

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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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
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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...
Ischemic Stroke ll: Pathophysiology01:15

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The Blood-brain Barrier00:49

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Comprehensive Endovascular and Open Surgical Management of Cerebral Arteriovenous Malformations
14:58

Comprehensive Endovascular and Open Surgical Management of Cerebral Arteriovenous Malformations

Published on: October 20, 2017

Cerebral arteriovenous malformations. Part 2: physiology.

Parham Moftakhar1, Jason S Hauptman, Dennis Malkasian

  • 1Department of Neurosurgery, Cedars Sinai Medical Center, University of California, Los Angeles, California 90095, USA.

Neurosurgical Focus
|May 5, 2009
PubMed
Summary

Brain arteriovenous malformations (AVMs) exhibit dynamic changes like growth and regression due to molecular and physiological processes. Understanding these hemodynamic factors is key for effective AVM therapies.

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Area of Science:

  • Neuroscience
  • Vascular Biology
  • Medical Physiology

Background:

  • Brain arteriovenous malformations (AVMs) are complex vascular lesions with evolving characteristics.
  • Understanding the molecular and physiological mechanisms underlying AVM behavior is crucial for therapeutic development.

Purpose of the Study:

  • To conduct a comprehensive literature review on the genetics, pathophysiology, and behavior of brain AVMs.
  • To evaluate current scientific understanding of AVMs, including their growth, remodeling, and regression.

Main Methods:

  • A comprehensive literature search was performed using PubMed.
  • The review focused on angioarchitecture and cerebral hemodynamics related to AVM development.

Main Results:

  • Key factors influencing AVMs include feeding artery pressures, compartmentalization, venous drainage, and vascular steal.
  • Hemodynamic and flow-related phenomena contribute significantly to the dynamic nature of brain AVMs.

Conclusions:

  • The evolving nature of brain AVMs is significantly influenced by hemodynamic forces.
  • A deeper understanding of these forces is essential for addressing challenges in endovascular and surgical treatments.
  • Continued research will further elucidate the natural history and predicted behavior of AVMs.