- Cardiac ejection fraction (EF) < 40% on multi-gated acquisition (MUGA) scan or cardiac echocardiogram (echo) (or if unable to obtain ejection fraction, shortening fraction of < 26%); patients with active or a history of cardiac disease should be evaluated with appropriate cardiac studies and/or consult; ejection fraction is required if age > 50 years or there is a history of anthracyclines or history of cardiac disease; patients with a shortening fraction < 26% may be enrolled if approved by a cardiologist