Whole Heart 4D Hemodynamics in Patients with Transposition of the Great Arteries After Switch Procedure

Julia Geiger¹, Raoul Arnold², Zoltan Csatari¹, Mathias Langer¹, Michael Markl¹

The purpose of this study was to employ whole heart flow-sensitive 4D MRI for the identification and quantification of altered aortic and pulmonary hemodynamics in patients with transposition of the great arteries (d-TGA) after arterial switch procedure. Compared to healthy volunteers, significantly increased peak velocities were observed in the modified pulmonary trunk and arteries located fully anterior to the aorta. A correlation between the surgically altered TP positions with the occurrence of vortex flow indicates the potential of 4D flow analysis to evaluate the impact of changes in vascular geometry on regional hemodynamics.