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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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