RT Book, Section A1 Kiefer, Todd A1 Granger, Christopher B. A1 Jackson, Kevin P. A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1193147719 T1 Atrioventicular Block T2 Current Medical Diagnosis & Treatment 2023 YR 2023 FD 2023 PB McGraw-Hill Education PP New York, NY SN 9781264687343 LK accessmedicine.mhmedical.com/content.aspx?aid=1193147719 RD 2024/04/19 AB ESSENTIALS OF DIAGNOSISConduction disturbance between the atrium and ventricle that can be physiologic (due to enhanced vagal tone) or pathologic.Block occurs in the AV node (first-degree, second-degree Mobitz type I) or below the AV node (second-degree Mobitz type II, third-degree).Symptomatic AV block or block below the AV node in the absence of a reversible cause usually warrants permanent pacemaker implantation.