Video 1
In Case 1, pre-BAV was performed with a 20-mm Z-Med-II balloon to facilitate delivery of the transcatheter valve system followed by successful transfemoral transcatheter aortic valve replacement with 26-mm Edwards SAPIEN-3 Ultra valve; see also at https://youtu.be/tQL--I3zPY8. pre-BAV: pre-implantation balloon-aortic valvuloplasty
Figure 1
(A) In case 1, 12-lead electrocardiogram shows inferior axis, QS pattern in leads aVR and aVL, and precordial transition earlier than V3, suggestive of left ventricular outflow tract origin. (B) Case 2 shows QR pattern in V1, inferior axis, voltage ratio of lead II/III > 1, and precordial transition in V3, suggestive of left ventricular outflow tract origin.
Video 2
In Case 2, pre-BAV with a 20-mm Z-Med-II balloon followed by transfemoral transcatheter aortic valve replacement with a 26-mm Edwards SAPIEN-3 Ultra valve; see also at https://youtu.be/PtCRCwWqjJQ. pre-BAV: pre-implantation balloon-aortic valvuloplasty