Fig. 3From: A case with a trend of QT interval prolongation due to the introduction of methadone to a pancreatic cancer patient on levofloxacinChanges in QTc value. For QTc, the results of the 12-lead (A) and simple (B) electrocardiogram are shown. Because the two forms of electrocardiogram were measured using different devices, changes in QTc were judged according to different criteriaBack to article page