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Atrial Rhythms

Terms in this set (8)

Atrial Fibrillation
Rhythm Irregular
Rate Very fast (> 350 bpm) for Atrial, but ventricular rate may be slow, normal or fast
P Wave Absent - erratic waves are present
PR Interval Absent
QRS Normal but may be widened if there are conduction delays
Notes
Atrial Flutter
Rhythm Regular or irregular
Rate Fast (250-350 bpm) for Atrial, but ventricular rate is often slower
P Wave Not observable, but saw-toothed flutter waves are present
PR Interval Not measureable
QRS Normal (0.06-0.10 sec)
Notes
Multifocal Atrial Tachycardia
Rhythm Irregular
Rate Fast (> 100 bpm)
P Wave Often changing shape and size from beat to beat (at least three differing forms)
PR Interval Variable
QRS Normal (0.06-0.10 sec)
Notes T wave is often distorted Also review wandering atrial pacemaker lesson
Premature Atrial Complex
Rhythm Irregular
Rate Usually normal but depends on underlying rhythm
P Wave Premature, positive and shape is abnormal
PR Interval Normal or longer
QRS 0.10 sec or less
Notes
Supraventricular Tachycardia
Rhythm Regular
Rate Fast (150-250 bpm)
P Wave Merged with T wave
PR Interval Normal (0.12 sec)
QRS Normal (.10 sec)
Notes PR interval can be difficult to measure
Wandering Atrial Pacemaker
Rhythm May be irregular
Rate Normal (60-100 bpm)
P Wave Changing shape and size from beat to beat (at least three diffferent forms)
PR Interval Variable
QRS Normal (0.06-0.10 sec)
Notes T wave normal. If heart rate exceeds 100 bpm, then rhythm may be multifocal atrial tachycardia (MAP)
Wolff-Parkinson-White Syndrome
Rhythm Regular unless atrial fibrillation present
Rate Normal (60-100 bpm)
P Wave Normal
PR Interval Can be short (<0.12 sec)
QRS Usually wide (> 0.12 sec)
Notes Look for short PR interval and/or delta wave A delta wave (positive or negative) distorts the early part of the QRS complex
Wandering Atrial Pacemaker
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