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12-lead electrocardiogram showed sinus rhythm with PVCs, showing RS in lead V1 and R in leads II, III, and aVF, with a LBBB and right inferior axis QRS morphology. It was suspected that they originated from the LVOT. LBBB, right bundle branch block pattern; LVOT, left ventricular outflow tract; PVCs, premature ventricular contractions.
