 uncontrolled hypertension, symptomatic congestive heart failure class 2 refer to appendix 4 for grading, unstable angina pectoris, stroke or myocardial infarction within 6 months, serious cardiac arrhythmia requiring treatment, with the exceptions of atrial fibrillation and paroxysmal supraventricular tachycardia or conduction abnormality that has been treated and for which the patient is no longer at risk for serious arrhythmia e.g., Wolff-Parkinson-White syndrome treated with surgical ablation 