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17 Cards in this Set
- Front
- Back
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Atrial Fibrillation
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The atria are so irritable that a multitude of foci initiate impulses causing the atria to depolarize repeatedly in a fibrillatory manner. The AV node blocks most of the impulses, allowing only a limited number through the ventricles
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A-Fib
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One of the most common atrial dysryhthmias
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A-Fib three defiant characteristics
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notable absence of P wave.
P waves replaced by F Waves Ventricular response rate totally irregular or termed irregulary irregularity QRS complexes are usually within Normal Limits |
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A Fib Five Step, R,R,P,PR,QRS
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Rate: 350-400 (atrial, Ventricular variable)
Rhythm irregularly irregular P waves: Normal P waves absent and replaced by F waves PRI= N/A QRS complexs: less than 0.12 |
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SVT or PSVT Facts
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catchall name for a fast above the ventricles over 100bpm if you can't identify
Applies to any tachycardia originating above the ventricle PSVT (Paroxysmal) sudden Occurs when rapid Atrial ectopic focus overrides the Sa node and becomes hearts primary pacemaker. |
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Times to use SVT or PSVT
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(Note: Sinus tach seldom exceeds 160-170bpm at a high range.
if you can't distinguish between atrial or ventricular activity If it's Equal or greater than 180bpm |
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SVT/PSVT 5 step approach R, R, P, PRI,SQRS
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Rate: 150-250 (Atrial), 150-250 Ventricular,
Rhythm: Regular P wave: N/A PRI: N/A QRS: Complex usually WNL (less than 0.12) |
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Treatment for PSVT, SVT
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Vagal Maneuvers (stimulating the vagus nerve), Via bearing down, coughing, squatting or carotid sinus message. or Valsalva
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Wolff Parkinson White Syndrome (WPW) (Pre excitation syndrom)
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Characterized by two AV conduction pathways
identified by delta wave seen on EKG QRS is greater than 0.12 (wide QRS) due to ventricles stimulated by impulse originated outside normal conduction pathway |
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Three things to identify WPW
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Shortened PRI (Less than .12)
It has a delta wave or a slurring of the QRS complex Wide QRS complex |
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PAC (Premature atrial Complex) key points
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PAC will not have a compensatory pause
underlying rhythm is interrupted due to PAC After non compensatory pause the underlying rhythm returns When calculating the rate include PACS |
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Atrial Flutter Rhythm Key points
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Single irritable site in the atria, it initiates many electrical impulses at a rapid rate
Normal P wave not produced (instead it's recognized as a flutter wave) Electrical impulses conducted through the atria at a very fast rate Av node becomes "gate keeper to ventricles" |
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A-Flutter rates
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Base on # of impulses AV node accepts ventricular response is established
(usually 2:1 or 4:1 (Two atrial contractions for each ventricular contraction),or four atrial conduction to each ventricular contraction |
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A flutter key points
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An atrial rate of 300bpm will be parallel to a ventricular rate of 75 bpm. We're concerned about the ventricular rate not atrial because the ventricular is the actual output.
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Atrial flutter with a slow ventricular response
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is a ventricular rate of less than 60bpm
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Atrial flutter with a rapid ventricular response
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Is a ventricular rate of 100-150
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Atrial flutter 5 step approach (R, R, P,PRI, QRS)
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Rate: 250-300 (atrial), Ventricular is variable
Rhythm atrial rhythm will be regular ventricular can be irregular or regular P waves are replaced by sawtooth F waves. PRI: N/A QRS look alike and is less than .12 *IDENTIFY Variable conductions moves from 4:1-3:1 back to 4:1) etc. |
