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Related Concept Videos

Vascular Spasm01:16

Vascular Spasm

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The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
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An aortic aneurysm is a localized outpouching or dilation at a weak point in the artery wall. It may involve different parts of the aorta, such as the abdominal aorta, aortic arch, or thoracic aorta.Etiological factorsSeveral disorders are associated with aortic aneurysms.Congenital causes, such as primary connective tissue disorders like Marfan syndrome, impact the integrity and strength of connective tissues, notably affecting the aorta. Marfan syndrome is a genetic disorder that specifically...
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Epistaxis01:30

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Epistaxis, or nosebleeds, occurs when small, swollen blood vessels in the nasal mucous membrane rupture. Typically, the anterior septum is the primary site of occurrence.
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Related Experiment Video

Updated: Aug 31, 2025

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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Spontaneous subarachnoid haemorrhage.

Jan Claassen1, Soojin Park1

  • 1Department of Neurology, Columbia University Irving Medical Center, New York Presbyterian Hospital, New York, NY, USA.

Lancet (London, England)
|August 19, 2022
PubMed
Summary
This summary is machine-generated.

Subarachnoid haemorrhage (SAH) is a common stroke subtype impacting public health. Early diagnosis via CT/lumbar puncture and prompt aneurysm treatment are crucial for improved patient outcomes.

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Related Experiment Videos

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Area of Science:

  • Neurology
  • Neurosurgery
  • Public Health

Background:

  • Subarachnoid haemorrhage (SAH) is the third most common stroke subtype, with significant long-term neuropsychiatric sequelae.
  • Despite decreasing incidence, SAH impacts public health due to its onset in mid-adulthood, reducing quality of life.
  • Common symptoms include sudden severe headache, meningismus, and neurological deficits.

Purpose of the Study:

  • To review the current understanding of subarachnoid haemorrhage (SAH) epidemiology, clinical presentation, diagnosis, and management.
  • To highlight the importance of early aneurysm treatment and management of secondary complications.
  • To emphasize the role of specialized centers and multidisciplinary teams in SAH care.

Main Methods:

  • Diagnosis involves CT scans and lumbar puncture.
  • Aneurysms, the common cause of spontaneous SAH, are diagnosed via angiography.
  • Review of established and emerging treatment strategies for SAH.

Main Results:

  • Early hospital admission improves outcomes, though long-term depression is common.
  • Emergent interventions focus on preventing rebleeding and early aneurysm treatment (coiling or clipping).
  • Management addresses secondary complications like hydrocephalus, delayed cerebral ischemia, and medical issues.

Conclusions:

  • SAH remains a significant public health concern requiring specialized care.
  • Multidisciplinary management in high-volume centers is optimal for SAH patients.
  • Emerging research targets early brain injury, but current focus remains on secondary complications.