Abstract #2725
4D Flow MRI: Analysis of Aortic Hemodynamics after Valve-Sparing Aortic Root Replacement with an Anatomically Shaped Sinus Prosthesis
Thekla Oechtering 1 , Julian Haegele 1 , Peter Hunold 1 , Michael Scharfschwerdt 2 , Markus Huellebrand 3 , Hans-Hinrich Sievers 2 , Jrg Barkhausen 1 , and Alex Frydrychowicz 1
1
Clinic for Radiology and Nuclear Medicine,
University Hospital Schleswig-Holstein, Lbeck, Germany,
2
Department
of Cardiac and Cardiothoracic Vascular Surgery,
University Hospital Schleswig-Holstein, Lbeck, Germany,
3
Fraunhofer
MEVIS, Bremen, Germany
The anatomically shaped sinus prosthesis (Uni-GraftW
SINUS, Braun) implies near-physiological hemodynamics.
Therefore, we sought to assess their flow
characteristics in comparison to straight grafts and
volunteers by use of 4D Flow MRI. 15 patients (13 with
sinus prosthesis, 3 straight grafts) and 15 age-matched
healthy volunteers were examined at 3T (Philips
Achieva). Secondary flow patterns in four segments of
the thoracic aorta and geometry were analyzed. We found
near-physiological flow in the sinuses of sinus
prostheses in contrast to straight grafts. Patients
typically presented with angular geometries and
increased vortex formation in the ascending aorta,
presumably related to prosthesis implantation.
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