- Screening supine blood pressure ≥140 mm Hg (systolic) or ≥90 mm Hg (diastolic), on a single measurement (confirmed by a single repeat, if necessary) following at least 5 minutes of rest 7. Single 12-lead ECG demonstrating QTc >450 msec or a QRS interval >120 mseca at screening. If QTc exceeds 450 msec, or QRS exceeds >120 mseca the ECG should be repeated two more times and the average of the three QTc or QRS values should be used to determine the subject's eligibility.