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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...
Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
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...
Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
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...

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Related Experiment Video

Updated: May 24, 2026

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
10:34

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage

Published on: August 30, 2020

[Spontaneous subarachnoid hemorrhage].

H Steinmetz1

  • 1Zentrum der Neurologie und Neurochirurgie, Klinikum der J.W. Goethe-Universität, Schleusenweg 2-16, 60528 Frankfurt am Main, Deutschland. h.steinmetz@em.uni-frankfurt.de

Der Nervenarzt
|February 22, 2012
PubMed
Summary
This summary is machine-generated.

Non-traumatic subarachnoid hemorrhage presents diagnostic and management challenges, requiring a multidisciplinary approach for optimal outcomes. Long-term care for survivors involves addressing neurological, cognitive, and psychiatric morbidities, alongside vascular risks.

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Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
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Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

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Endovascular Perforation Model for Subarachnoid Hemorrhage Combined with Magnetic Resonance Imaging (MRI)
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Endovascular Perforation Model for Subarachnoid Hemorrhage Combined with Magnetic Resonance Imaging (MRI)

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Related Experiment Videos

Last Updated: May 24, 2026

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
10:34

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage

Published on: August 30, 2020

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
09:14

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Published on: June 18, 2021

Endovascular Perforation Model for Subarachnoid Hemorrhage Combined with Magnetic Resonance Imaging (MRI)
06:30

Endovascular Perforation Model for Subarachnoid Hemorrhage Combined with Magnetic Resonance Imaging (MRI)

Published on: December 16, 2021

Area of Science:

  • Neurology
  • Neurosurgery
  • Radiology

Context:

  • Non-traumatic subarachnoid hemorrhage (SAH) is a complex cerebrovascular disorder.
  • Patients often initially present to primary care or emergency physicians unfamiliar with SAH diagnosis.
  • Aneurysmal rupture accounts for 85% of SAH cases, necessitating specialized neurosurgical and neuroradiological intervention.

Purpose:

  • To highlight the multidisciplinary challenges in diagnosing and managing non-traumatic subarachnoid hemorrhage.
  • To emphasize the need for a collaborative approach involving neurosurgeons and neuroradiologists.
  • To underscore the importance of addressing long-term care needs for survivors.

Summary:

  • Subarachnoid hemorrhage diagnosis and management require a multidisciplinary team, particularly for aneurysmal rupture.
  • Treatment decisions, such as "clip or coil," involve expert neurosurgical and neuroradiological input.
  • Survivors of SAH, often young, face significant long-term challenges including neurological deficits, cognitive impairment, psychiatric issues, and recurrent vascular risks.

Impact:

  • Establishes a multidisciplinary approach as the evidence-based standard of care for subarachnoid hemorrhage.
  • Improves the understanding of the complexities in diagnosing and managing SAH.
  • Raises awareness of the underestimated long-term care requirements for SAH survivors, promoting better patient outcomes and quality of life.