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Figure 1 A posterio-anterior radiograph showing the multielectrode array (B) canted toward the tricupsid annulus by a guide wire passed out through the right ventricular outflow tract, so that the multielectrode array pigtail is straightened in the ventricle. Also seen are catheters in the high right atrium (RA), right ventricular apex (RVA), His bundle (His), coronary sinus (CS) and a mapping/ablation catheter on the tricupsid annulus-inferior vena cava isthmus (Map).
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