A migraine produces a host of changes in vascular tone in blood vessels
that are in the brain. The end result of vasodilation of these vessels
is a stimulation of central reflexes that stimulate the vagus nerve.
This nerve in turn stimulates the stomach and has important nervous
effects on the heart. The end result--vasodilation (low BP), along with
nausea and a slow heart rate-a vasovagal event.
POSTED BY: STEVEN AJLUNI, MD
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