 - Left ventricular ejection fraction LVEF 30, measured within the past six months by any technique, unless there was a cardiovascular event that could have modified the LVEF during that period e.g., coronary artery bypass grafting CABG, myocardial infarction MI. If the patient was started on a beta-blocker or biventricular pacing cardiac resynchronization therapy, or CRT, the LVEF measurement must have been at least three months after starting the therapy. 