To determine the effect of early metoprolol administration after non-traumatic subarachnoid hemorrhage (SAH) on the brain and cardiac tissue damage and inflammation, we will conduct a pilot randomized controlled trial comparing (1) sympathetic nervous system (SNS) activation, (2) cardiac rhythm abnormalities, (3) biomarkers of brain and cardiac tissue damage, and (4) and neutrophil activity in patients receiving metoprolol (n=10) or placebo (n=10) for the first 72-hours after SAH.
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