Key result
Nodoventricular pathway transitions between concealed in ORT and acting as a bystander during AVNRT.
Demonstrates a rare electrophysiological phenomenon where a nodoventricular pathway acts as both a critical circuit component and an innocent bystander in the same patient.
Single-case observation warrants no change in SVT management; leaves open mechanistic prevalence of nodoventricular pathways.
We encountered a single case in which a transition between orthodromic reciprocating tachycardia with a concealed nodoventricular pathway and atrioventricular nodal reentrant tachycardia with a bystander nodoventricular pathway was observed.
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Mizutani et al. (2025) studied this question. A nodoventricular pathway exhibited a transition between being concealed in orthodromic reciprocating tachycardia and acting as a bystander in atrioventricular nodal reentrant tachycardia.
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