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In this informative session, Dr. Rey Vivo explains the mechanisms and site of origin of supraventricular arrhythmias, helping viewers recognize and differentiate different types of supraventricular arrhythmias. Improve your understanding of arrhythmias with this comprehensive discussion.
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SupravetricularTachyarrhythmiasPart 1 Rey Vivo, MD Assistant Professor of Medicine Texas Tech University Health Sciences Center
Define the mechanisms of arrhythmias Understand the relevance of the site of origin to the arrhythmia Recognize and differentiate the Supraventricular Arrhythmias Objectives
“You see only what you look for, you recognize only what you know.”
Two most important aspects of arrhythmias: 1. Their mechanism 2. Their site of origin Basics • The two mechanisms that • produce arrhythmias are: • Automaticity • (problems of impulse • formation) • 2. Block or Reentry • (problems of impulse • conduction)
Accelerated Automaticity Reentrant Atrial Tachyarrhythmias Reentrant Junctional Tachyarrhythmias - The Atrioventricular Nodal and Bypass Tachycardias SVTs
Sinus Tachycardia Atrial Tachyarrhythmias e.g. PAT with Block, MAT 3. Accelerated Junctional Rhythm Accelerated Automaticity
1. Atrial Flutter 2. Atrial Fibrillation Reentrant Atrial Tachs
Accelerated Automaticity • May originate from any of the pacemaker cells • “Ectopic” – any rhythm that comes from any other site than the SA node
Sinus Tachycardia • Tips: • Max. rate: 220 – age • Discrete, antegrade P waves • Short PR interval • Normal QRS duration
Accelerated atrial rhythm Paroxysmal Atrial Tachycardia with Block Multifocal Atrial Tachycardia Atrial Tachycardias
Wandering Atrial Pacemaker-Multifocal Atrial Tachycardia Spectrum
Atrial flutter Atrial fibrillation Reentrant Atrial Tachs Single circuit, Uniform F waves Multiple circuits, Multiform f waves
Atrial Flutter Flutter waves best seen on inferior leads (II, III, aVF) and V1
Atrial Fibrillation Fibrillatory waves best seen in inferior waves and V1
We make most mistakes because of failure to apply reason and logic, not because of ignorance. Barney Marriott, MD EKG expert Author, Practical Electrocardiography Let’s practice!