Practice Level 3 Case 80: A 51-Year-Old Man with Palpitation History Diagnosis History A 51-year-old man is complaining of palpitation, that he describes as a sensation of isolated “thumps” in his anterior chest: Diagnosis Sinus rhythm with frequent blocked premature atrial complexes (PAC)Ventricular rate 43/min ECG ID: E323 Bookmark Please login to bookmark Username or Email Address Password Remember Me No account yet? Register