Key result
Histologic studies of 10 hearts with electrophysiologically proven dual AV nodal pathways showed normal AV node structure, suggesting the anatomical substrate may be too subtle for gross morphology.
Observational (n=10)
The anatomical substrate for dual AV nodal pathways is not evident on gross morphologic examination, suggesting the potential for these pathways may be ubiquitous.
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May indicate ubiquitous dual AV nodal potential despite normal histology; leaves open functional substrate identification for future research.
Ho et al. (1993) conducted an observational in Electrophysiologically proven dual atrioventricular nodal pathways (n=10). Histologic examination was evaluated on Morphology of the cardiac conduction system. Histologic studies of 10 hearts with electrophysiologically proven dual AV nodal pathways showed normal AV node structure, suggesting the anatomical substrate may be too subtle for gross morphology.
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