Case #1a
AP left vertebral injection
In this case, the middle meningeal artery has a direct connection with the basilar artery. This is likely through an enlarged trigeminal branch which connects to the middle meningeal artery. Embolization of the arteriovenous fistula (AVF) could be fatal.
Case #1b
Lateral left vertebral injection
Same case as above showing the direct basilar to middle meningeal artery connection.