The purpose of this research study is to test an experimental procedure called intra-arterial
delivery of verapamil in patients diagnosed with acute ischemic stroke. This study
investigates the safety of intra-arterial delivery of verapamil, a drug used to treat
vasospasm (spasm of a blood vessel), and how it affects recovery from stroke. Recruitment is
limited to patients that have received mechanical thrombectomy as standard of care.