- Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, myocardial infarction within the previous 3 months, coronary angioplasty or stenting or bypass grafting within the past 6 months, cardiac ventricular arrhythmias requiring medication, any history of 2nd or 3rd degree atrioventricular conduction defects, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.