CSCT EXAM PREP
1. Multifocal Atrial Tachycardia
Answer -HR>100bpm (usually 100-150bpm; may be as high as 250bpm)
-Irregularly irregular rhythm w/ varying PP, PR, RR intervals
-3 distinct P-wave morphologies in the same lead
-Isoelectric baseline b/w P-waves (no flutter waves)
-not just a sinus rhythm w/ frequent PACs
2. Paroxysmal Atrial Tachycardia
Answer -atrial tachycardia that begins & ends abruptly
-P wave abnormal in comparison to sinus P wave
-atrial rate >100bpm
-3 consecutive identical ectopic p waves
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,-QRS usually normal unless pre-existing bundle branch
-isoelectric baseline
3. Premature Atrial Complex (PAC)
Answer -abnormal (non-sinus) P wave is followed by a QRS complex
-can hide in preceding T wave
4. Atrial Fibrillation
Answer -irregularly irregular rhythm
-no P waves
-absence of an isoelectric baseline
-variable ventricular rate
-QRS complexes usually <120ms
-coarse or fine fibrillary waves
5. Atrial Flutter
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, Answer -narrow complex tachycardia
-regular atrial activity at ~300bpm
-flutter waves (saw-tooth) best seen in leads II, III, aVF
-loss of isoelectric baseline
6. Ashman's Phenomenon
Answer -type of beat w/ a wide QRS complex, typically mimicking RBBB
-typically appears during atrial fibrillation
-often mistaken for PVCs
-follow a short R-R interval and are preceded by a long R-R interval
-aberrantly conducted complex that originates above the AV node rather than originating in the right or left ventricle
7. Aberrancy
Answer
8. Junctional Escape Rhythm
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1. Multifocal Atrial Tachycardia
Answer -HR>100bpm (usually 100-150bpm; may be as high as 250bpm)
-Irregularly irregular rhythm w/ varying PP, PR, RR intervals
-3 distinct P-wave morphologies in the same lead
-Isoelectric baseline b/w P-waves (no flutter waves)
-not just a sinus rhythm w/ frequent PACs
2. Paroxysmal Atrial Tachycardia
Answer -atrial tachycardia that begins & ends abruptly
-P wave abnormal in comparison to sinus P wave
-atrial rate >100bpm
-3 consecutive identical ectopic p waves
1/
19
,-QRS usually normal unless pre-existing bundle branch
-isoelectric baseline
3. Premature Atrial Complex (PAC)
Answer -abnormal (non-sinus) P wave is followed by a QRS complex
-can hide in preceding T wave
4. Atrial Fibrillation
Answer -irregularly irregular rhythm
-no P waves
-absence of an isoelectric baseline
-variable ventricular rate
-QRS complexes usually <120ms
-coarse or fine fibrillary waves
5. Atrial Flutter
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19
, Answer -narrow complex tachycardia
-regular atrial activity at ~300bpm
-flutter waves (saw-tooth) best seen in leads II, III, aVF
-loss of isoelectric baseline
6. Ashman's Phenomenon
Answer -type of beat w/ a wide QRS complex, typically mimicking RBBB
-typically appears during atrial fibrillation
-often mistaken for PVCs
-follow a short R-R interval and are preceded by a long R-R interval
-aberrantly conducted complex that originates above the AV node rather than originating in the right or left ventricle
7. Aberrancy
Answer
8. Junctional Escape Rhythm
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19
