September 1, 2026
When a brain aneurysm ruptures, it causes a subarachnoid hemorrhage (SAH)—a severe brain bleed that requires immediate emergency neurosurgical or endovascular intervention to repair the vessel. However, securing the aneurysm is only the first critical milestone. In the days following a brain bleed, patients face a second major threat: cerebral vasospasm.
Cerebral vasospasm refers to the sudden, involuntary constriction of major blood vessels in the brain. It typically develops between 4 to 14 days after an initial subarachnoid hemorrhage.
When blood collects in the subarachnoid space surrounding the brain, it gradually breaks down. The degradation products of blood release chemical compounds that irritate the outer walls of surrounding arteries. In response to this irritation, these arteries constrict severely, restricting blood flow and oxygen delivery to normal brain tissue.
Left untreated, severe vasospasm leads to Delayed Cerebral Ischemia (DCI), which can trigger secondary strokes and permanent neurological damage.
Because cerebral vasospasm occurs while patients are recovering from an initial hemorrhage, detecting changes requires continuous clinical vigilance:
Neurovascular care relies on advanced monitoring protocols inside specialized neuro-intensive care units to detect vasospasm early:
Continuous post-surgical neuro-intensive monitoring ensures these secondary vascular threats are identified and treated promptly.