- a marked baseline prolongation of QT/QTc interval (e.g. repeated demonstration of a QTc interval >450 ms) as recommended by ICH E14. For patients who have a QTc interval between 450 ms and 500 ms, as judged by site personnel, there will be a confirmatory reading by centralized evaluation institute. If the confirmatory reading is still greater than 450 ms, patient will be excluded. Patients with a QTc interval >=500 ms will immediately be excluded from the study.