Arrhythmias & electrophysiology
Interatrial Synchronized Pacing at the Posterosuperior Bundle: Feasibility, Mechanism, and Mid-Term Outcomes
Authors' conclusion
PSB pacing is a feasible, safe, and effective strategy for atrial pacing.
Study context
- Population
- Consecutive patients with pacing indications
- Participants
- 33 patients
- Outcome
- Feasibility of PSB pacing (procedural success)
Methodological detailsconsecutive patients, single-group
- Consecutive patients
- Single-group
Main finding
As reported in the abstract
PSB pacing success
Posterosuperior bundle (PSB) pacing
100%
Observational data: associations, not effects.
Further findings
P-wave duration · follow-up (mean 7.6±3.6 months)
- Baseline
- 120±15 ms
- Follow-up
- 104±18 ms
- Shortened from baseline to follow-up
- P < 0.05
P-wave duration, interatrial conduction delay (intrinsic P-wave duration ≥120 ms) (subgroup) · mean follow-up
- Baseline
- 130±10 ms
- Follow-up
- 111±17 ms
- Shortened from baseline to follow-up
- P < 0.05
Pacing parameters
- Atrial capture threshold, remained stable
- 1.0±0.4 V
- Sensing amplitude, remained stable
- 2.0±1.4 mV
Structural and functional echocardiography
- Parameters maintained
Safety
Procedural complications (increased atrial capture threshold, atrial lead perforation or dislodgement)
- No procedural complications; stable lead fixation
Clinical events · mean follow-up 7.6±3.6 months
- HF hospitalization
- 1
- AF recurrence hospitalization
- 1
- Syncope unrelated to pacing
- 1
Original publication
Interatrial Synchronized Pacing at the Posterosuperior Bundle: Feasibility, Mechanism, and Mid-Term Outcomes. Circ Arrhythm Electrophysiol. Published 25 December 2025. doi:10.
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