Causes of the Eight Basic Rhythm Patterns

Causes of the Eight Basic Rhythm Patterns: Excerpt from A Pocket Manual of Differential Diagnosis

Regular rhythm at normal rates
   Normal sinus rhythm
   Accelerated junctional rhythm
   Accelerated idioventricular rhythm
   Atrial flutter with 4:1 conduction
   Atrial tachycardia with block
Early beats
   Extrasystole
   Parasystole
   Capture beats
   Intermittent improved conduction during heart block
   Rhythm resumption after inapparent bigeminy
Pauses
   Nonconducted premature atrial contractions (PACs) (most common)
   Second-degree atrioventricular (AV) block (types I
and II)
   Second-degree sinoatrial (SA) exit block
   Concealed conduction
   Concealed junctional extrasystoles
Bradycardia
   Sinus bradycardia
   Nonconducted atrial bigeminy
   Second- and third-degree AV block
   Second- and third-degree SA block
Bigeminy
   PACs and premature ventricular contractions (PVCs)
   3:2 SA and AV block
   Atrial tachycardia or flutter with alternate 4:1 and 2:1
conduction
   Nonconducted atrial trigeminy
   Reciprocal beating
   Concealed junctional extrasystoles
Chaos
   Atrial fibrillation
   Atrial flutter with variable conduction
   Multifocal atrial tachycardia
   Wandering pacemaker
   Multifocal PVCs
   Parasystoles
   Combinations of the above
Regular tachycardia
   Sinus tachycardia
   Paroxysmal atrial tachycardia
   Atrial flutter
   Ectopic atrial tachycardia
   Junctional tachycardia
   Ventricular tachycardia
Group beating
   Nonconducted extrasystoles
   SA nodal Wenckebach exit block

   AV nodal Wenckebach block

Adapted from Marriott HJL: Practical Electrocardiography, 7/e. Baltimore: Williams & Wilkins, 1983.

Book Source Details

• Book Title: A Pocket Manual of Differential Diagnosis
• Author(s): Stephen N. Adler, Dianne B. Gasbarra
• Year of Publication: 1999
• Copyright Details: A Pocket Manual of Differential Diagnosis, Copyright © 1999 Lippincott Williams & Wilkins.

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More About This Book: Title: A Pocket Manual of Differential Diagnosis Authors: Stephen N. Adler, Dianne B. Gasbarra Publisher: Lippincott Williams & Wilkins Copyright: 1999 ISBN: 0-78171-943-7

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