Cardiac Dysrhythmias


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Table of Contents

Cardiac Dysrhythmias

Sinus Dysrhythmias

PPT Slide

PPT Slide

Respiratory Arrhythmia

R-R Interval Widens During Expiration

Sinus Arrest

Sinus Arrest

Escape Or Rescue Beats

Rescue Beats May Have Their Origin High Up In The Atria Or Down Low Close To The AV Node Or Even In The Ventricles.

If The Ectopic Pacemaker Is Close To The SA Node, It Will Be An Atrial Escape Beat. It Will Have These Features :

Atrial Escape Or Rescue Beat

If The Rescue Beat Is Close To The AV Node, Then It Will Likely Be A Junctional Escape Beat

Characteristics Of A Junctional Escape Beat :

Junctional Rescue Or Escape Beat

If The Rescue Beat Is Located In The Ventricles, Then It Is A Ventricular Pacemaker That Is Activated To Rescue The Heart

Characteristics Of A Ventricular Rescue Beat Are :

Ectopic Pacemakers Have Their Own Firing Rates

Ectopic Pacemaker Rates

What Can Cause The SA Node To Go Into Sinus Arrest ?

Wandering Pacemaker

Characteristics Of A Wandering Pacemaker :

Wandering Pacemaker

Wandering Atrial Pacemaker

Sick Sinus Syndrome

Sick Sinus Syndrome Characterized By :

Sick Sinus Syndrome

Ectopic Supraventricular Dysrhythmias

Premature Atrial Contractions (PACís Or APBís)

Causes Of PACís :

Digitalis Toxicity

Premature Atrial Contraction

Premature Atrial Contraction

PACís Can Deteriorate Into :

Premature Junctional Beats (PJBís)

Characteristics Of PJBís :

Premature Junctional Beat

Sustained Supraventricular Dysrhythmias


Causes Are :

Characteristics Of PSVT Are :

Paroxysmal Atrial Tachycardia

Carotid Massage Can Bring A Person Out Of PSVT


Atrial Flutter

Characteristics Of Atrial Flutter :

QRS Complexes Are Normal & Regular

Causes Of Atrial Flutter :

Pulmonary Emboli

Atrial Flutter


Atrial Fibrillation

Characteristics Are :

Atrial Fibrillation

Atrial Fibrillation



Can A Patient Chronically Live With These Dysrhythmias ?

Inherent Dangers

Patients Can Auto-Embolize Organ Systems If The Heart Spontaneously Converts Out Of The Dysrhythmia

Patients Must First Be Anti-Coagulated & Then Converted Out Of The Dysrhythmia

Author: Microsoft Corporation

Email: David.Arnall@NAU.EDU , DAArnall@AOL.COM

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