Arrhythmias & electrophysiologyResearch article
Last Entrainment Response
- Analysis of the last entrainment response of AVNRT
Authors' conclusion
Analysis of the LER accurately identified the E-SP in AVNRT.
Study context
- Population
- Patients with slow-fast atrioventricular nodal re-entrant tachycardia (AVNRT) after manifest entrainmentgroup A 27 · group B 13
- Participants
- 40 patients
- Comparison
- Post-pacing interval (PPI) at each of 6 intra-atrial sites vs tachycardia cycle length (TCL)
- group An = 27
- group Bn = 13
Main finding
As reported in the abstract
PPI vs TCL, group A
PPIs from HB to site I were shorter than TCL
P < 0.0001
PPI at posteroinferior-CSOS was longer than TCL
P < 0.0001
Further findings
| Outcome | Estimate | P value |
|---|---|---|
| PPI vs TCL, group B · did not differ | 354.7 ± 36.5 vs 354.8 ± 36.6 milliseconds | P = 0.3370 |
- PPI vs TCL, group B — PPIs from HB to site M were shorter than TCL
- P < 0.001
- PPI vs TCL, group B — PPIs at inferior- and posteroinferior-CSOS were longer than TCL
- P < 0.001
Location of entrance to the slow pathway (E-SP) and ablation sites
- E-SP was located at inferior-CSOS in group A and site I in group B
- Successful slow pathway ablation sites matched these sites
Original publication
Last Entrainment Response. JACC Clin Electrophysiol. Published 11 May 2026. doi:10.1016/j.jacep.2026.04.010
Summarised from the published abstract; every number is checked against it