Answers are grounded in this paper and cite their sources.
This longitudinal study demonstrates that the electrophysiological properties of accessory pathways evolve over time in infants and children, often resulting in decreased inducibility of tachycardia or loss of pre-excitation.
In this study the electrophysiological developmental changes of accessory pathway (AP) properties in infants and children are examined. Intracardiac and/or transesophageal electrophysiological studies were performed on seven infants (group 1, mean age 2 months) and four children (group 2, mean age 9 y; study 1), and documented orthodromic atrioventricular tachycardia in all cases. At follow-up study (study 2), supraventricular tachycardia was induced in three of seven (43%) cases in group 1 and in all four cases in group 2. Changes in antegrade conduction properties of AP were documented by loss of pre-excitation (two of four cases in group 1) or change to intermittent pre-excitation (one of two cases in group 2).
No takes yet. Share an insight, caveat, or question.
Ding et al. (1995) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: