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Also seen in aberrancy
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A common example would be an ''interpolated PVC'' (a type of [[premature ventricular contraction]]) during [[normal sinus rhythm]]; the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV node. However, this AV node stimulation can cause a delay in subsequent AV conduction by modifying the AV node's subsequent conduction characteristics. Hence, the P-R interval after the PVC is longer than the baseline P-R interval.{{citation needed|date=August 2018}}
A common example would be an ''interpolated PVC'' (a type of [[premature ventricular contraction]]) during [[normal sinus rhythm]]; the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV node. However, this AV node stimulation can cause a delay in subsequent AV conduction by modifying the AV node's subsequent conduction characteristics. Hence, the P-R interval after the PVC is longer than the baseline P-R interval.{{citation needed|date=August 2018}}

Concealed conduction can be seen in [[cardiac aberrancy]] when a bundle branch temporarily blocks due to being refractory, and conduction from the other bundle branch conceals into the blocked branch retrograde thus perpetuation the bundle branch block morphology in subsequent beats.


Another variation on this concept is seen in [[atrial flutter]]. As a result of the rapid atrial rate, some of the atrial activity fails to get through the AV node in an antegrade direction but can alter the rate at which a subsequent atrial impulse is conducted. In this circumstance, an alteration in the F-wave to QRS relationship is seen.{{citation needed|date=August 2018}}
Another variation on this concept is seen in [[atrial flutter]]. As a result of the rapid atrial rate, some of the atrial activity fails to get through the AV node in an antegrade direction but can alter the rate at which a subsequent atrial impulse is conducted. In this circumstance, an alteration in the F-wave to QRS relationship is seen.{{citation needed|date=August 2018}}

Revision as of 03:47, 8 February 2024

Laddergram illustrating interpolated VPBs and concealed conduction

Concealed conduction is tissue stimulation without direct effect, but leading to a change in conduction characteristics.[1]

A common example would be an interpolated PVC (a type of premature ventricular contraction) during normal sinus rhythm; the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV node. However, this AV node stimulation can cause a delay in subsequent AV conduction by modifying the AV node's subsequent conduction characteristics. Hence, the P-R interval after the PVC is longer than the baseline P-R interval.[citation needed]

Concealed conduction can be seen in cardiac aberrancy when a bundle branch temporarily blocks due to being refractory, and conduction from the other bundle branch conceals into the blocked branch retrograde thus perpetuation the bundle branch block morphology in subsequent beats.

Another variation on this concept is seen in atrial flutter. As a result of the rapid atrial rate, some of the atrial activity fails to get through the AV node in an antegrade direction but can alter the rate at which a subsequent atrial impulse is conducted. In this circumstance, an alteration in the F-wave to QRS relationship is seen.[citation needed]

See also

References

  1. ^ Josephson, Mark E. (2008). Clinical Cardiac Electrophysiology: Techniques and Interpretations. Lippincott Williams & Wilkins. p. 145. ISBN 9780781777391. Retrieved 24 September 2018.