b. Any past medical history of ventricular arrhythmia c. Uncontrolled hypertension (Systolic arterial pressure of ≥ 160 mmHg or diastolic pressure ≥ 95 mmHg) d. Long QT congenital syndrome e. Left ventricular ejection fraction of less than 45% measured by isotropic ventriculography for patients with a significant cardiac past medical history (myocardial infarct, severe hypertension, arrhythmia or exposition to anthracyclines).