Figure 3: Demonstrating the CARTUNIVU™ modality wherein the image created using the CARTO™ was integrated onto the fluoroscopic screen. Each panel shows the location of the heart chambers on the left screen and final lead positions on the right. Panels A-D show RAO 30^o, AP, RAO 50^o and LAO 30^o views, respectively. Note the perpendicular orientation of the His bundle lead and RV lead implant towards the interventricular septum, and atrial lead in right atrial appendage. AP = antero-posterior, RAO = right anterior oblique, LAO = left anterior oblique, TA = tricuspid annulus (white outline), CS = coronary sinus, HB = His bundle RA = right atrium, RAA = right atrial appendage, RV = right ventricle, RVOT = right ventricular outflow tract, IVS = interventricular septum (blue dashed line), IVC = inferior vena cava, SVC = superior vena cava.