PMC5067385_01
(A) ECG lead II shows a ventricular premature complex, prolonged QT interval leading to ventricular fibrillation. (B) ECG lead II shows torsades de pointes.
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PMC5067385_01_gr1.jpg
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Postoperative ECG of the first patient showed a ventricular premature complex and prolonged QT interval (673 ms) triggering ventricular fibrillation (Fig. 1A) and torsades de pointes (Fig. 1B).
Holter monitoring shows the runs of polymorphic ventricular tachycardia.
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Holter study of the second patient showed multiple runs of polymorphic ventricular tachycardia with baseline corrected QT of 523 ms (Fig. 2).