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Related Concept Videos

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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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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: Mar 15, 2026

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

R Loch Macdonald1, Tom A Schweizer1

  • 1Division of Neurosurgery, St Michael's Hospital, Toronto, ON, Canada; Labatt Family Centre of Excellence in Brain Injury and Trauma Research, St Michael's Hospital, Toronto, ON, Canada; Department of Surgery, University of Toronto, Toronto, ON, Canada.

Lancet (London, England)
|September 18, 2016
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Summary

Subarachnoid hemorrhage, often caused by ruptured aneurysms, is a severe stroke. While survival has improved, survivors frequently face cognitive impairments and mood disorders, impacting quality of life.

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Area of Science:

  • Neurology
  • Neurosurgery
  • Stroke Medicine

Background:

  • Subarachnoid hemorrhage (SAH) is a severe stroke subtype, typically caused by ruptured intracranial aneurysms.
  • SAH affects individuals at a mean age of 55, significantly impacting productive life years.

Purpose of the Study:

  • To review current understanding and management of aneurysmal subarachnoid hemorrhage.
  • To identify challenges and future directions in SAH research and treatment.

Main Methods:

  • Review of existing clinical trials and management strategies for subarachnoid hemorrhage.
  • Analysis of survival trends, treatment outcomes, and long-term sequelae.

Main Results:

  • Survival rates for aneurysmal subarachnoid hemorrhage have increased by 17% due to improved diagnostics, early repair, nimodipine, and intensive care.
  • Survivors frequently experience cognitive impairments, mood disorders, fatigue, and sleep disturbances, affecting daily function and quality of life.
  • Only two interventions have demonstrated improved outcomes in clinical trials.

Conclusions:

  • Specialized neurological intensive care and multidisciplinary expertise in high-volume centers are crucial for SAH management.
  • Future efforts should focus on preventative strategies, improved screening, less invasive aneurysm repair techniques, and enhanced outcome assessments including neurocognitive function and biomarkers.