Use of Cardiac Magnetic Resonance Imaging and Cardiac Magnetic Resonance
feature-tracking strain analysis to characterize and differentiate
aortic annular strain patterns in aortic valve regurgitation versus
normal aortic valves.
Abstract
Understanding the aortic annulus is important for obtaining reproducible
and durable aortic valve repair and allowing advances for TAVR treatment
of aortic regurgitation. Significant limitations exist when using
echocardiography and CT-based imaging with feature tracking at the
aortic annulus. Cardiac Magnetic Resonance is used to obtain Regional
Longitudinal Strain (RLS) and can be modified to obtain circumferential
annular strain at the fibrous and muscular portions of the aortic valve
annulus. Holst and colleagues use a novel method to characterize and
prove that adverse annular deformation occurs at the muscular portion of
the aortic valve annulus in patients with aortic regurgitation. The
direction of muscular annular deformation in patients with aortic
regurgitation is opposite to the direction of muscular annular
deformation in patients with normal aortic valves.