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Twelve lead ECG and activation maps of the first and second beats of spontaneously initiated VF in a 30-year-old man. The PVC initiating VF has a similar morphology as the previous PVC with subtle changes in the precordial leads (V2-V3). The PVC initiating VF is located at the antero-apical RV (white star). The subsequent beat is a figure of eight at the same site as the first PVC.
