Key result
V-V interval changes preceding A-A changes in regularly irregular tachycardias diagnose AVNRT.
Why the study?
The diagnostic approach to supraventricular tachycardia has mainly been described for tachycardias with stable cycle length, with limited guidance for regularly irregular tachycardias.
Case Report
Diagnostic criteria for regular supraventricular tachycardias can be cautiously extrapolated to regularly irregular tachycardias, where cycle length alternans may indicate AVNRT with alternating anterograde conduction.
V-V precedence may diagnose AVNRT in irregular SVTs; leaves open prospective validation before routine use.
Key Teaching Points•The approach to supraventricular tachycardia diagnosis has mainly been described for tachycardias with a stable cycle length. However, extrapolation of criteria derived from regular tachycardias can also be performed with caution to regularly irregular tachycardias.•When there are variations in cycle length, if V-V interval changes precede and predict A-A interval changes, then a diagnosis of atrioventricular nodal reentrant tachycardia (AVNRT) can be made.•Cycle length alternans may be seen in AVNRT in case of anterograde conduction alternating between 2 slow pathways. •The approach to supraventricular tachycardia diagnosis has mainly been described for tachycardias with a stable cycle length. However, extrapolation of criteria derived from regular tachycardias can also be performed with caution to regularly irregular tachycardias.•When there are variations in cycle length, if V-V interval changes precede and predict A-A interval changes, then a diagnosis of atrioventricular nodal reentrant tachycardia (AVNRT) can be made.•Cycle length alternans may be seen in AVNRT in case of anterograde conduction alternating between 2 slow pathways.
No takes yet. Share an insight, caveat, or question.
Tampakis et al. (2023) conducted a case report in Atrioventricular nodal reentrant tachycardia (AVNRT). Diagnostic criteria for AVNRT was evaluated. In regularly irregular tachycardias, if V-V interval changes precede and predict A-A interval changes, a diagnosis of atrioventricular nodal reentrant tachycardia (AVNRT) can be made.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: