[Cerebral vasospasm caused by subarachnoid hemorrhage]

Area of Science:

• Neuroscience
• Biochemistry

Context:

• Vasospasm is a frequent and severe complication following subarachnoid hemorrhage (SAH).
• It leads to high mortality and significant neurological deficits, often resulting in disability.
• Diagnosis relies on clinical timing (3-8 days post-SAH) and angiographic confirmation.

Purpose:

• To review the primary pathogenetic theories of vasospasm following SAH.
• To identify key biochemical substances involved in vasospasm genesis.
• To discuss current treatment strategies aimed at preventing ischemic complications.

Summary:

• The etiology of SAH-induced vasospasm is multifactorial, with blood in the subarachnoid space playing a central role.
• Key biochemical factors include oxyhemoglobin, free radicals, lipid peroxides, and arachidonic acid metabolites.
• Early aneurysm exclusion and pharmacological treatments, particularly calcium antagonists, show promise.

Impact:

• Improved understanding of SAH vasospasm mechanisms.
• Guidance for developing targeted therapeutic interventions.
• Potential to reduce mortality and long-term disability associated with SAH.