Why is it necessary to embolize both sides of a pseudoaneurysm aneurysm or AVF?
Significant reconstitution of flow via collaterals can occur and cause recurrence of the lesion. If only the proximal feeding vessel to a pseudoaneurysm is embolized, flow may reverse in the outflow vessel and feed the pseudoaneurysm. Embolizing both sides of a pseudoaneurysm, aneurysm, or AVF is called “embolizing the front and back door of a lesion” and is also sometimes needed when embolizing bleeding vessels.
