Figure and Video legends
Figure : Images were formed by merging of a 3D-Electroanatomic mapping system (EnSite Precision™, Abbott) and the fluoroscopy. The mapping catheter reaches the ventricular surface of the right coronary cusp using the ‘reverse S’ curve via the antegrade transseptal approach in the right (A) and left (B) anterior oblique views. In panels A and B, only the aortic root with 3 cusps and the ascending aorta were merged. In panels C and D, the left ventricular cavity was shown with the earliest ventricular activation (dots) in the same region in the right (C) and left (D) anterior oblique views. In panels E and F, combined 3D-Electroanatomic mapping (the aorta and the left ventricle) was merged with the fluoroscopic image of the mapping catheter in the right (E) and left (F) anterior oblique views.
Video : Six videos (A-F) corresponding to 6 panels in the figure.