- Patients with uncontrolled arrhythmia or uncontrolled heart disease at the screening time; patients with coronary heart disease (recent myocardial infarctions, angina, cardiac stent, or bypass surgery in the last 6 months) need to be cleared with a stress echo or nuclear myocardial perfusion stress test, and cardiology consult; all other cardiac history will be at the discretion of the principal investigator