[Subarachnoid hemorrhage: protective hypotension in delayed surgery]

Area of Science:

• Neurology
• Critical Care Medicine
• Cardiovascular Research

Context:

• Systemic hypertension is a common complication in subarachnoid hemorrhage (SAH) patients.
• Uncontrolled hypertension may increase rebleeding risk, cerebral edema, and intracranial pressure.
• Conversely, aggressive blood pressure reduction can impair cerebral perfusion in patients with compromised autoregulation, risking ischemia.

Purpose:

• To review the implications of systemic hypertension in subarachnoid hemorrhage.
• To discuss the risks and benefits of antihypertensive therapy in SAH patients.
• To identify appropriate agents for blood pressure management in this population.

Summary:

• Antihypertensive therapy is generally not recommended for preventing rebleeding after SAH.
• The management of blood pressure in SAH requires careful consideration of autoregulation.
• Mixed alpha and beta-adrenergic antagonists and barbiturates are suggested for blood pressure reduction.

Impact:

• Informs clinical decision-making regarding blood pressure management in SAH.
• Highlights the delicate balance between preventing rebleeding and maintaining cerebral perfusion.
• Guides the selection of pharmacological agents for managing hypertension post-SAH.