Key result
Output-dependent ECG shifts of ≥10 ms reliably distinguish BBAP from high atrial septal pacing.
Why the study?
The anatomic overlap between Bachmann bundle area pacing and high atrial septal pacing limits the reliability of fluoroscopy and static ECG criteria for identifying preferential interatrial conduction.
Observational
Answers are grounded in this paper and cite their sources.
May aid BBAP identification at implant via output-dependent ECG; leaves open prospective validation before adoption.
BACKGROUND: Bachmann bundle area pacing (BBAP) improves interatrial synchrony, but its anatomic overlap with high atrial septal pacing (HASP) limits the reliability of fluoroscopy and static electrocardiogram (ECG) criteria for identifying preferential interatrial conduction. OBJECTIVES: To determine whether output-dependent ECG changes, validated by coronary sinus (CS) mapping of left atrial (LA) activation, can differentiate BBAP from adjacent HASP during implantation. METHODS: ). Output-dependent changes in P-wave morphology and timing were evaluated, and leads were repositioned to achieve shorter PWD and earlier LA activation. RESULTS: of ≥10 milliseconds consistently separated the study-defined BBAP and HASP groups within this cohort but should be considered hypothesis-generating and requires prospective validation. These findings represent physiologic evidence rather than definitive proof of direct Bachmann bundle capture.
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zheng et al. (2026) conducted an observational in Patients requiring atrial pacing. Output-dependent electrocardiographic criteria vs. High atrial septal pacing (HASP) was evaluated on Separation of BBAP and HASP groups based on output-dependent ECG changes. Output-dependent ECG changes of ≥10 milliseconds consistently separated Bachmann bundle area pacing from high atrial septal pacing during implantation.
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