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Figure 1: Electrocardiogram on admission and after normalization of alterations for case 2. (a) Electrocardiogram showed sinus rhythm with prolonged PR interval (174 ms), complete right bundle branch block (QRS of 174 ms), and prolonged QTc interval (518 ms). (b) Electrocardiogram after flecainide removal

Figure 1: Electrocardiogram on admission and after normalization of alterations for case 2. (a) Electrocardiogram showed sinus rhythm with prolonged PR interval (174 ms), complete right bundle branch block (QRS of 174 ms), and prolonged QTc interval (518 ms). (b) Electrocardiogram after flecainide removal