12
Introduction
Figure 9. Mechanisms of Dynamic and Static Obstruction in
Aortic Dissection
A, Static obstruction occurs
when the dissection flap
extends from the aortic
lumen into the ostium of the
affected branch vessel, leading
to localized thrombosis
of the branch false lumen
that narrows or colludes
the branch true lumen and,
consequently, impairs distal
branch perfusion.
B, Dynamic obstruction
occurs when the false
lumen becomes persistently
pressurized and compresses
the true lumen, in turn
pushing the dissection flap
up against the ostium of
the affected branch vessel,
significantly reducing or
occluding its flow.
C, Sometimes, a branch vessel
can suffer from both static
and dynamic obstruction at
the same time.
Adapted with permission from Grewal, et al. Tech Vasc Interv Radiol. 2021;24:100751.
Copyright 2021, Elsevier, Inc.
