- Qualifying 12-lead ECG within 6 calendar months before consent date and at least 3 calendar months after most recent MI, PCI or CABG. (The qualifying ECG* can be sinus rhythm or atrial fibrillation (patients with persistent or permanent atrial fibrillation should have a controlled ventricular response <100 bpm on consent date) *QRS duration on the qualifying ECG >90 msec)