11. Significant cardiovascular disease, myocardial infarction within the past 6 months, unstable angina, unstable arrhythmia or a need for anti-arrhythmic therapy (use of medication to control heart rate in patients with atrial fibrillation is allowed, if stable medication for at least last month prior to randomization and medication not listed as causing Torsade de Points), or evidence of acute ischemia on ECG.