Atrial Premature Complexes: Difference between revisions

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[[Image:Rhythm_premature.png|thumb| A premature atrial complex (PAC). (In this example the atrial p-wave is difficult to discern).]]
[[Image:Rhythm_premature.png|thumb| A premature atrial complex (PAC). (In this example the atrial p-wave is difficult to discern).]]
[[Image:Bes.png|thumb| A premature atrial complex (PAC) with evident negative p-wave]]
[[Image:Bes.png|thumb| A premature atrial complex (PAC) with evident negative p-wave]]
Premature atrial complexes origin from an ectopic pacing region in the atria. They are an example of [[Ectopic Beats|ectopic beats]]. The result is a p-wave with often a different morphology as the preceding ones.  
Premature atrial complexes origin from an ectopic pacing region in the atria. They are an example of [[Ectopic Beats|ectopic beats]]. The result is a p-wave with often a different morphology from the preceding ones.  


A premature atrial complexe is usually followed by a [[Ectopic Beats|noncompensatory pause]] caused by the fact that atrial depolarization enters the sinus node and resets the sinus rhythm.
A premature atrial complex is usually followed by a [[Ectopic Beats|noncompensatory pause]] caused by the fact that atrial depolarization enters the sinus node and resets the sinus rhythm.


Premature atrial complexes are common and usually benign.
Premature atrial complexes are common and usually benign.