Cerebral vasospasm after subarachnoid hemorrhage: an update

Area of Science:

• Neurology
• Neurosurgery
• Critical Care Medicine

Background:

• Symptomatic vasospasm is the leading cause of morbidity following acute subarachnoid hemorrhage.
• Vasospasm is linked to blood clots in basal subarachnoid cisterns, detectable by early CT scans.
• Onset typically occurs 4-12 days post-hemorrhage, presenting with neurological deficits and altered consciousness.

Purpose of the Study:

• To review the current understanding of symptomatic vasospasm after subarachnoid hemorrhage.
• To discuss diagnostic methods, clinical presentation, and therapeutic strategies.
• To explore the underlying mechanisms and ongoing research into vasospasm.

Main Methods:

• Review of existing literature on subarachnoid hemorrhage and vasospasm.
• Analysis of diagnostic correlations between CT findings and vasospasm development.
• Examination of therapeutic interventions, including volume expansion and blood pressure management.

Main Results:

• Symptomatic vasospasm correlates with subarachnoid clot burden.
• Hyponatremia and volume depletion are common complicating factors.
• Current effective therapy involves volume expansion, blood pressure elevation, and ICP management.

Conclusions:

• Symptomatic vasospasm remains a critical challenge after subarachnoid hemorrhage.
• Effective management relies on early detection and aggressive supportive care.
• The etiology of vasospasm requires further investigation, particularly regarding smooth muscle cell mechanisms.