Premature Atrial Contractions

Rate

Normal or accelerated
P wave

Usually have a different morphology than sinus P waves because they originate from an ectopic pacemaker
QRS

Normal
Conduction

Normal, however the ectopic beats may have a different P-R interval.
Rhythm

PAC's occur early in the cycle and they usually do not have a complete compensatory pause.

PAC's occur normally in a non diseased heart.

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With PACs, all the P waves look identical.
True
 False

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