TY - CHAP M1 - Book, Section TI - Left Atrial Hypertrophy 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 - Increased duration (width) of the P wave without affecting its upward amplitude (as commonly seen with right atrial abnormalities)Negative P-wave deflection in lead V1, with width and depth > 40 msBifid P wave in lead II with total P duration > 110 ms and > 40 ms between two peaksNotched P wave in II, III, or aVF with duration ≥ 120 ms SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/04/16 UR - accessmedicine.mhmedical.com/content.aspx?aid=1181052713 ER -