Arrhythmias & electrophysiology
Local ventriculoatrial (VA) index for the differential diagnosis of supraventricular tachycardia
Authors' conclusion
A local VA interval difference <40 ms provides a clear distinction for AVRT.
Study context
- Population
- Patients referred for supraventricular tachycardia evaluation
- Participants
- 75 patients
- Comparison
- Local VA index in atrioventricular reentrant tachycardia (AVRT) vs atrioventricular nodal reentrant tachycardia (AVNRT)
- AVRTn = 37reference
- AVNRTn = 38
- Outcome
- Local VA index (VA interval on coronary sinus catheter at earliest atrial activity, entrainment minus tachycardia)
Performance
As reported in the abstract
Local VA index
AVRT
−1
mean · SD 13 · ms
AVNRT
91
SD 46 · ms
P < 0.01
- Optimal differentiation threshold of local VA index
- 40 ms
Further findings
PPI-TCL
P < 0.01
SA-VA
P < 0.01
Pacing cycle length vs nodal decrement and intraventricular delay by pathway location
- No significant correlation
Original publication
Local VA index for the differential diagnosis of supraventricular tachycardia. Heart Rhythm. Published 27 January 2024. doi:10.
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