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Statements

Subject Item
dbr:Concealed_conduction
rdf:type
yago:Sign106646243 yago:Clue106643763 yago:Communication100033020 yago:Indication106797169 yago:WikicatMedicalSigns yago:Abstraction100002137 yago:Evidence106643408
rdfs:label
Concealed conduction
rdfs:comment
Concealed conduction is tissue stimulation without direct effect, but leading to a change in conduction characteristics. 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.
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dbc:Cardiac_electrophysiology dbc:Medical_signs
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dbr:Atrioventricular_node dbc:Cardiac_electrophysiology n10:Concealed_conduction.png dbr:Normal_sinus_rhythm dbc:Medical_signs dbr:Atrial_flutter dbr:Premature_ventricular_contraction dbr:Electrocardiogram
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dbo:abstract
Concealed conduction is tissue stimulation without direct effect, but leading to a change in conduction characteristics. 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. 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.
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wikipedia-en:Concealed_conduction