4. Active or clinically significant cardiac disease including: Congestive heart failure - New York Heart Association (NYHA) > Class II. Active coronary artery disease. Cardiac arrhythmias requiring anti-arrhythmic therapy other than beta blockers or digoxin. Unstable angina (anginal symptoms at rest), new-onset angina within 3 months before randomization, or myocardial infarction within 6 months before randomization.