RT Book, Section A1 Hay, Jr, William W. A1 Levin, Myron J. A1 Deterding, Robin R. A1 Abzug, Mark J. SR Print(0) ID 1145453930 T1 Atrioventricular (AV) Block T2 Quick Medical Diagnosis & Treatment Pediatrics YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781264257614 LK accesspediatrics.mhmedical.com/content.aspx?aid=1145453930 RD 2024/04/20 AB First-degree AV block: Prolongation of the PR intervalSecond-degree AV blockMobitz type I (Wenckebach)Recognized by progressive prolongation of the PR interval until there is no QRS following a P waveMobitz type IINo progressive lengthening of the PR interval before the dropped beatCongenital complete AV blockMost common formOccurs in a fetus or infant with an otherwise normal heart