Practice Level 3 Case 114: A 68-Year-Old Man with Chest Pain History Diagnosis History A 68-year-old man is in the Emergency Department complaining of crushing central anterior chest pain that started 30 minutes earlier: Diagnosis Sinus Bradycardia, 55/minFirst degree AV blockLeft bundle branch block ECG ID: E225 Bookmark Please login to bookmark Username or Email Address Password Remember Me No account yet? Register