TY - CHAP M1 - Book, Section TI - Atrioventricular Conduction Abnormalities A1 - Zimmerman, Franklin H. PY - 2023 T2 - ECG Core Curriculum AB - The term normal sinus rhythm indicates depolarization by the sinus pacemaker at a standard rate (60-100 bpm) followed by normal atrial depolarization and atrioventricular (AV) conduction to the ventricles. This requires perfect coordination of the entire specialized conduction system so that every P wave is accompanied by a normal PR interval and then by a QRS complex. The structures of the specialized conduction system include the SA node, interatrial and internodal bundles, the AV junction (subdivided into the AV node and the bundle of His), the bundle branches, and the Purkinje fibers. Abnormalities of AV conduction can arise anywhere along this route, which produce the ECG findings that we will review in this chapter. SN - PB - McGraw Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accesscardiology.mhmedical.com/content.aspx?aid=1200100968 ER -