IRREGULAR
Rate: depends on underlying rhythm
Premature Atrial Contraction P wave: Present or hidden in T wave
PR Interval: 0.12-0.20 sec
QRS: <0.12 sec
IRREGULAR
Atrial rate: UNMEASURABLE
Ventricular rate: variable
Atrial Fibrillation
P wave: unable to see
PR Interval: N/A
QRS: <0.12 sec
IRREGULAR
Ventricular rate: 100-175
A fib RVR P wave: unable to see
PR Interval: N/A
QRS <0.12 sec
Usually REGULAR can be irregular
Atrial rate: 250-350
Ventricular rate: variable BUT < atrial rate
Atrial Flutter
P Wave: Flutter
PR Interval: N/A
QRS: <0.12 sec
Regular
Rate: 150-350
Supraventricular Tachycardia P wave: Hidden in QRS or T wave
PR: unable to determine
QRS: <0.12 sec
Regular
Rate: 40-60
Junctional Rhythm P Wave: ABSENT or INVERTED
PR Interval: None or <0.12
QRS: <0.12 sec
Regular
Rate: 60-100
Accelerated Junctional Rhythm P Wave: NONE or INVERTED
PR Interval: None or <0.12
QRS: <0.12 sec
2/6
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