 - Participants with a past history of heart arrhythmias extra systolic beats or tachycardia at rest or with a history of risk factors for Torsade de Pointes syndrome for example, hypokalemia or family history of shortlong QT syndrome, or sudden unexplained death at a young age less than or equal to 40 years, drowning or sudden infant death in a first degree relative that is, sibling, offspring, or biological parent 