- Cardiac ejection fraction < 30% or, if unable to obtain ejection fraction, shortening fraction of < 26%) on multi-gated acquisition (MUGA) scan or cardiac echo, symptomatic coronary artery disease, other cardiac failure requiring therapy; patients with a history of, or current cardiac disease should be evaluated with appropriate cardiac studies and/or cardiology consult; patients with a shortening fraction < 26% may be enrolled if approved by a cardiologist