RT Book, Section A1 Zimmerman, Franklin H. SR Print(0) ID 1200100545 T1 Mechanisms of Arrhythmias T2 ECG Core Curriculum YR 2023 FD 2023 PB McGraw Hill Education PP New York, NY SN 9780071785211 LK accessmedicine.mhmedical.com/content.aspx?aid=1200100545 RD 2024/10/11 AB It’s now time to begin our discussion of arrhythmias, one of the most important aspects of clinical electrocardiography. In the last chapter, we reviewed the fate of the normal sinus depolarization, using either a simple or expanded laddergram to illustrate passage of the impulse through the AV node and the remainder of the specialized conduction system until activating the ventricles (Figure 13-1). A cardiac arrhythmia may be defined as any disruption or aberration of this normal electrical sequence from start to finish.