1. Aneurysmal subarachnoid hemorrhage triggers a catecholamine surge that drives secondary brain injury.
2. Higher catecholamine levels are linked to worse outcomes and mortality.
3. Vasospasm and delayed cerebral ischemia are key complications.
4. Cardiac and pulmonary dysfunction are common systemic effects.
5. Targeting adrenergic pathways may improve outcomes.

Source: Acute and Critical Care