RT Book, Section A1 Huis in ‘t Veld, Maite A. A1 Mattu, Amal A1 Thurman, R. Jason A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181052433 T1 Left Anterior Fascicular Block T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1181052433 RD 2024/10/03 AB QRS duration normal or slightly prolongedLeft axis deviation (without any other reasons for leftward axis on ECG)Small R wave and large S wave in the inferior leads (II, III, aVF)Small Q with a large R wave in the lateral leads (I, aVL)