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Transcript 
Basic Dysrhythmias
Interpretation & Management
Robert J. Huszar, MD
Chapter 1
A & P of the Heart
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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
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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
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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
THE END
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