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Figure 4 Cardiac Tracings Exhibiting the Termination of a Sustained Ventricular Tachycardia Originating From the Right Coronary Cusp by Probable Mechanical Pressure of the Ablation Catheter at the Successful Ablation Site

RVd = distal electrode pair of the right ventricular catheter; RVp = proximal electrode pair of the right ventricular catheter; other abbreviations as in Figures 1 and 2.