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8 Cards in this Set
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- Back
- 3rd side (hint)
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Wandering Atrial Pacemaker
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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 |
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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 |
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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. |
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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 |
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Atrial Flutter
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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 |
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Atrial Fibrillation (A-fib)
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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 |
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Sinus Tachycardia
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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 |
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Sinus Bradycardia
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rate: less than 60
Rhythm: regular P wave: yes upright and uniform PRI: 0.12-0.20 QRS: yes less than 0.12 |
