Figure 4

Transfemoral TAVI under CMR guidance using real-time TrueFISP sequences. Safe advancement of the delivery system with the mounted stent-valve up to the aortic arch which could not be passed in the first animal, resulting in controlled release of the prosthesis in the thoracic aorta distal to the left subclavian artery (A). Stepwise deployment of the CoreValve prosthesis across the native aortic annulus in the second transfemoral animal (B). Note the distinct susceptibility artifacts of the delivery system and the stent-valve, allowing precise determination of the position of the delivery device tip (bracket) and the mounted stent-valve (arrow)