List for Karyn S. Huntting's Basilar Artery Migraine Page. Basilar Artery Migraine (BAM) is a migraine variant, often misdiagnosed, that can--if severe enough--cause stroke, coma, or even death due to brainstem ischemia (insufficient blood/oxygen to the brainstem, which controls vital functions like respiration). Hallmark symptoms include vertigo, vision problems, numbness, tingling, and more. For complete information, visit Karyn S. Huntting's Basilar Artery Migraine Page.