RT Book, Section A1 Bashore, Thomas M. A1 Granger, Christopher B. A1 Jackson, Kevin P. A1 Patel, Manesh R. A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1184695885 T1 Atrioventicular Block T2 Current Medical Diagnosis & Treatment 2022 YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269389 LK accessmedicine.mhmedical.com/content.aspx?aid=1184695885 RD 2023/09/26 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.