4. A history of prolonged QT/QTc interval or prolonged period from the beginning of the QRS complex to the end of the T wave on an ECG (QT)/ QT corrected for heart rate using Fridericia?s formula (QTcF) interval (QTcF &gt; 450 ms) as demonstrated by the mean of triplicate electrocardiogram (ECGs) (recorded at least 1 min apart) at Screening or Baseline Period