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8 Cards in this Set

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  • Back
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Wandering Atrial Pacemaker
rate: 60-100
Rhythm: Slightly irregular
P wave? Upright and uniform
PRI: varies depending on site
QRS: yes less than 0.12
Occurs when pacemaker sites wander from SA node to the other Pacemaker sites. Atria, Internodal Pathways or AV node
Premature Atrial Contractions
PAC
rate: usually normal
rhythm: regular xcept for PAC
P wave: differs in shape size and location
PRI:varies
QRS: similar to underlying rhythm, 0.12 sec.
a single impulse that originates in the atria outside the SA node. Can occur in the atria, the AV junction or ventricles
Multifocal Atrial Tachycardia
Re-entry dysrhythmia
rate: more than 100
Rhythm: irregular
P waves: organized non sinus P waves; at least 3 forms
PRI: varies depending on source impulse
QRS:varies
may result from pulmonary disease, metabolic disorders, ischemic heart disease or recent surgery.
Supraventricular Tachycardia
(SVT)
Rate: Atrial (160-240) Ventricular (160-240)
Rhythm: regular
P Wave: Usually not seen due to high rate
PRI: Usually not seen
QRS: yes, less than 0.12
encompasses all fast dysrhythmias <100
applies to any tachy rhythm originating above the ventricles
Paroxysmal refers to sudden onset or termination
Atrial Flutter
Rate: Atrial (240-350) ventricular (varies)
Rhythm: Atrial (reg) Ventricular (reg-ireg)
P wave: P wave is absent replaced by F wave (saw tooth)
QRS: yes, less than 0.12
Picket fence or sawtooth pattern
single irritable site in the atria initiates many electrical impulses at a fast rate. AV node becomes gatekeeper. 2:1 4:1 atrial contractions for each ventricular contraction. An atrial rate of 300 beats/min will parallel a ventricular rate of 75 beats/min
Atrial Fibrillation (A-fib)
Rate: Atrial (350-700) ventricular (varies)
Rhythm: irregularly irregular
P waves: p waves replaced by F waves
QRS: yes , less than 0.12
Most common, chronic in nature
Av node unable to conduct each impulse and allows impulses to to enter conduction system randomly
Sinus Tachycardia
Rate: 100-160
Rhythm: regular
P wave: yes, upright and uniform
Q wave: yes less than 0.12
rhythm originates in the SA node
only difference in NSR is the rate
Sinus Bradycardia
rate: less than 60
Rhythm: regular
P wave: yes upright and uniform
PRI: 0.12-0.20
QRS: yes less than 0.12