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Serial electrocardiographic strips upon patient admission. (A) Junctional rhythm with atrioventricular dissociation with prolonged QT interval. (B) Complete atrioventricular block followed by torsades de pointes before chemotherapy. (C) The complete atrioventricular block converted to 3:2 Wenckebach block on the sixth day of hospitalization. (D) To a first-degree atrioventricular block on the seventh day.
