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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 | 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 | 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. | ||