Practice Level 3 Case 13: A 72-Year-Old Man in the Cardiac Clinic History Diagnosis History A 72-year-old man in the cardiac clinic for reassessment for complaints of palpitation and fatigue: Diagnosis Atrial flutter with 3:1 AV conduction – Ventricular rate 90/min Incomplete right bundle branch block (iRBBB) (QRS duration = 110 msec) Septal infarction, age undetermined ECG ID: E684 Bookmark Please login to bookmark Username or Email Address Password Remember Me No account yet? Register