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Changes in the electrocardiogram associated with radiofrequency site of the left pulmonary vein. (a) The inferior wall of the left pulmonary vein. (b) The roof of the left pulmonary vein. (c) Anterior side of the superior left pulmonary vein. Twelve-lead electrocardiogram revealed ST-segment elevation in leads II, III, aVF (arrows), and I, aVL with ‘mirror’ ST-segment depression. (d) Anterior carina of the left pulmonary vein. ST-segment elevation in the inferior leads was resolved.
