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Figure 1 Pilsicainide-induced ventricular arrhythmia. (a) shows electrocardiogram (ECG) after administration of pilsicainide in case 3. A couplet of premature ventricular contraction (PVC) occurred, and QRS morphology of the PVC was left bundle branch block with inferior axis. (b) shows ECG after administration of pilsicainide in case 5. A triplet of PVC occurred, and QRS morphology of PVC was left bundle branch block with superior axis.
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