Practice Level 3 Case 19: A 83-Year-Old Man in the Cardiac Clinic History Diagnosis History A 83-year-old man is in the cardiac clinic: Diagnosis DDD pacing (atrial sensed, ventricular paced rhythm) Underlying sinus tachycardia, 109/min, Comment: The atrial activation (P) is sensed and is followed, after the programmed AV interval, by a ventricular paced output (the “spike”, a sharp vertical deflection”) and the ventricular activation (QRS). ECG ID: E625 Bookmark Please login to bookmark Username or Email Address Password Remember Me No account yet? Register