Population
Infants with unusual forms of heart block
Design
Other
Authors
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Supports monitoring PR intervals without assuming retrograde block in children; leaves open true incidence and reporting biases in larger cohorts.
Highlights the rarity of reported retrograde heart block or simple retrograde conduction in children despite frequent P-R prolongation.
Castellanos et al. (1960) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: