10. Impaired cardiac function including any of the following: Screening ECG with a corrected QT interval (QTc) > 470 msec; Patients with congenital long QT syndrome; History or presence of sustained ventricular tachycardia; Any history of ventricular fibrillation or torsades de pointes; Bradycardia defined as HR < 50 bpm; Right bundle branch block + left anterior hemiblock (bifascicular block); Patients with myocardial infarction or unstable angina < 6 months prior to starting study drug; congestive heart failure (CHF) NY Heart Association class III or IV; Patients with an ejection fraction < 50% assessed by multigated radionuclide angiography (MUGA) or ECHO scan within 14 days of Day 1.