Arrhythmias & electrophysiology
Tailored electrocardiographic-based criteria for different pacing locations within the left bundle branch
Authors' conclusion
Tailored ECG-based criteria might be useful to confirm LBBP at different pacing locations within the LBB.
Study context
- Population
- Consecutive patients with confirmed left bundle branch pacing (LBBP)unequivocal left bundle branch (LBB) capture
- Participants
- 147 patients
- Comparison
- Electrocardiographic (ECG)-based criteria for LBBP across pacing locations within the LBB
- Outcome
- Diagnostic performance and 100%-specific cutoffs of V6-RWPT, V6-V1 interpeak interval and aVL-RWPT for LBBP at each pacing location
Methodological detailsconsecutive patients
- Consecutive patients
Performance
As reported in the abstract
Cutoff values with 100% specificity for LBBP discrimination
| Test or model | V6-RWPT cutoff | V6-V1 interpeak interval cutoff | aVL-RWPT cutoff |
|---|---|---|---|
| Left bundle trunk pacing (LBTP) | 75 ms | 35.5 ms | 74 ms |
| Left septal fascicular pacing (LSFP) | 79.5 ms | 46 ms | 74.5 ms |
| Left posterior fascicular pacing (LPFP) | 68 ms | 53.5 ms | 73.5 ms |
| Left anterior fascicular pacing (LAFP) | 81 ms | 41 ms | 68 ms |
V6-RWPT cutoff
Left bundle trunk pacing (LBTP)75 ms
Left septal fascicular pacing (LSFP)79.5 ms
Left posterior fascicular pacing (LPFP)68 ms
Left anterior fascicular pacing (LAFP)81 ms
V6-V1 interpeak interval cutoff
Left bundle trunk pacing (LBTP)35.5 ms
Left septal fascicular pacing (LSFP)46 ms
Left posterior fascicular pacing (LPFP)53.5 ms
Left anterior fascicular pacing (LAFP)41 ms
aVL-RWPT cutoff
Left bundle trunk pacing (LBTP)74 ms
Left septal fascicular pacing (LSFP)74.5 ms
Left posterior fascicular pacing (LPFP)73.5 ms
Left anterior fascicular pacing (LAFP)68 ms
Further findings
Pacing location achieved
- Left fascicular pacing
- 82.8%
- LBTP
- 17.2%
Original publication
Tailored electrocardiographic-based criteria for different pacing locations within the left bundle branch. Heart Rhythm. Published 21 September 2023. doi:10.
Summarised from the published abstract; every number is checked against it