Beta-1 Adrenergic Inhibition to Reduce Cardiac Injury and Inflammation After Subarachnoid Hemorrhage (BADCATS)

"Metoprolol Dosing:~Metoprolol Injection (instructions: 5mg, once) Metoprolol Tab (25mg PO, q12 hours, timed to start 1hr after Metoprolol Injection, 6 doses) If unable to take PO medication, Metoprolol Injection (instructions, 5mg q6hrs for 12 doses) Continue for 72-hours of administration unless reaching stopping criteria"

"Placebo Dosing:~Placebo Injection (instructions: 5mL NS, once) Placebo Tab (1 tab PO, q12 hours, timed to start 1hr after placebo injection, 6 doses) If unable to take PO medication, Placebo Injection (instructions, 5mL q6hrs for 12 doses) Continue for 72-hours of administration unless reaching stopping criteria"