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Basic Dysrhythmias Interpretation & Management. Robert J. Huszar, MD. Chapter 1 A & P of the Heart. Cardiac Cycle Electrical Conduction System of the Heart Cardiac Cells Electrophysiology of the Heart Nervous Control of the heart. Types of Cells. Electrical (conductive) cells
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Basic DysrhythmiasInterpretation & Management Robert J. Huszar, MD
Chapter 1A & P of the Heart • Cardiac Cycle • Electrical Conduction System of the Heart • Cardiac Cells • Electrophysiology of the Heart • Nervous Control of the heart
Types of Cells • Electrical (conductive) cells • Mechanical (contracting) cells
COMPONENTS OF THE SPECIALIZED CONDUCTION SYSTEM • Sinoatrial Node (SA Node) • Internodal Tracts • Atrioventricular Node • Bundle of His • Bundle Branches • Purkinje Network
Accessory Conduction Pathway • Bundles of Kent • James Fibers • Mahaim fibers
Electrophysiology of the Heart • Resting State of the Cardiac Cell • Depolarization and Repolarization • Threshold Potential • Cardiac Action Potential • Refractory and Supernormal Periods • Excitability and Automaticity • Dominant and Escape Pacemakers of the Heart • Mechanisms of Abnormal Electrical Impulse Formation
Enhanced Automaticity • Reentry • Triggered Activity
Nervous Control of the Heart • Sympathetic • Parasympathetic