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Atrial Premature Complexes: Difference between revisions
Atrial Premature Complexes (view source)
Revision as of 09:46, 26 September 2011
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# Normally conducted | # Normally conducted | ||
# Conducted with aberrancy. Mostly right bundle branch block aberrancy as the RBBB has a longer refractory period. | # Conducted with aberrancy. Mostly right bundle branch block aberrancy as the RBBB has a longer refractory period. | ||
# Non-conducted. If the premature beat is very early, the AV node is refractory (cannot conduct) and the beat is not followed by a QRS complex. | # Non-conducted. If the premature beat is very early, the AV node is refractory (cannot conduct) and the beat is not followed by a QRS complex. A non-conducted premature atrial beat is often confused with type II second degree AV block where a normal sinus beat is not followed by a QRS complex. | ||
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. | 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. | ||