RT Book, Section A1 Chen, Peng-Sheng A1 Ho, Siew Yen A1 Priori, Silvia G. A1 Antzelevitch, Charles A2 Fuster, Valentin A2 Narula, Jagat A2 Vaishnava, Prashant A2 Leon, Martin B. A2 Callans, David J. A2 Rumsfeld, John S. A2 Poppas, Athena SR Print(0) ID 1202446868 T1 Electrophysiologic Anatomy, Mechanisms of Arrhythmias and Conduction Disturbances, and Genetics T2 Fuster and Hurst's The Heart, 15e YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264257560 LK accessmedicine.mhmedical.com/content.aspx?aid=1202446868 RD 2024/04/23 AB Chapter SummaryThis chapter examines our present understanding of anatomical, cellular, ionic, and molecular mechanisms responsible for cardiac arrhythmias (see Fuster and Hurst’s Central Illustration). The anatomical basis of cardiac arrhythmia is first discussed, with focus on the spatial relationships of cardiac and neighborhood structures when maneuvering catheters in and around the heart. The generation and maintenance of cardiac arrhythmias and conduction disturbances depend on the interactions of various genetic, molecular, fixed, and dynamic factors. Recent years have witnessed important advances in our understanding of the structural, molecular, and electrophysiologic mechanisms, fueled by innovative research into the genetic basis and predisposition for electrical dysfunction of the heart. These advances notwithstanding, our appreciation of the basis for many rhythm disturbances is still incomplete. While it is not possible to comprehensively review all important literature in this book chapter, we tried to examine new insights obtained from recent studies and put them into historical perspective whenever possible.