Key result
Concealed retrograde AVN penetration prolongs anterograde conduction versus omitted impulses and reveals two distinct subpopulations.
There are at least two subpopulations of patients without ventriculoatrial conduction whose AV node functional characteristics differ markedly based on the level of retrograde AVN concealment.
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Suggests heterogeneous AVN phenotypes in patients without VA conduction; hypothesis-generating and should not yet change practice.
Lehmann et al. (1984) studied Patients without intact ventriculoatrial conduction (n=13). Concealed retrograde atrioventricular node penetration vs. Anterograde alone, dual AVN activation, or omitted retrograde impulse was evaluated on Anterograde conduction and refractoriness in the AVN. Concealed retrograde AVN penetration prolonged anterograde conduction compared to omitted retrograde impulses, and revealed two subpopulations with distinct AVN functional characteristics.
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