TY - CHAP M1 - Book, Section TI - Left Bundle Branch Block 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 PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - Wide QRS complex > 120 msDominant S wave in V1-V3Broad monophasic, M-shaped or notched R wave in lateral leads (I, aVL, V5-V6)Appropriate discordance: the ST segment and T wave are in opposite direction to the main vector of the QRS complexLeft axis deviation SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/04/16 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181052426 ER -