ArticleHeart rhythm O22022
Reliable pace termination of postoperative atrial fibrillation in the canine sterile pericarditis model: Implications for atypical atrial flutter.
Article in Heart rhythm O2, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Role of Autonomic Dysfunction in Initiating Postoperative Atrial Fibrillation in a Canine Sterile Pericarditis Model.Pacing and clinical electrophysiology : PACE · 2025Article
- Nonpharmacologic rate control of postoperative atrial fibrillation in the canine sterile pericarditis model.Journal of cardiovascular electrophysiology · 2024Article
- Therapeutic advances in atrial fibrillation based on animal models.Journal of Zhejiang University. Science. B · 2024Review
- Validation of a new species for studying postoperative atrial fibrillation: Swine sterile pericarditis model.Pacing and clinical electrophysiology : PACE · 2023Article
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Authors and funding
5 authors.
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Abstract
backgroundWe have identified a reentrant circuit in the pulmonary vein region, which drives the atria, producing fibrillatory conduction, as one mechanism of postoperative atrial fibrillation (POAF) in the canine sterile pericarditis model.
objectiveIn this model, we tested the hypothesis that overdrive pacing from a site at or near such a reentrant circuit would interrupt it and thereby terminate POAF.
methodsWe studied 11 sterile pericarditis dogs on postoperative days 1-4. Atrial electrograms (AEGs) were recorded during POAF, overdrive pacing, and pace termination from 3 sites simultaneously: Bachmann's bundle, posterior left atrium, and right atrial appendage. When recorded AEGs demonstrated regular activation, pace termination was attempted at that site by delivering a drive train starting with 4 consecutive beats at a cycle length (CL) of 2-5 ms shorter than that of the intrinsic CL.
resultsSixteen episodes of sustained POAF (>5 minutes) diagnosed by electrocardiogram were induced. During all episodes of POAF, AEGs recorded from the left atrium exhibited regular activation, ie, constant AEG morphology and CL. When capture of the reentrant circuit by overdrive pacing occurred (mean 13 ± 5, range 5-23 beats), all 16 POAF episodes were successfully terminated. In all termination episodes, at the end of pacing but prior to the return of sinus rhythm, there was disorganized atrial activation in the previously organized sites (mean 2 seconds, range 0.1-8 seconds). However, these beats did not sustain POAF in the absence of a reentrant circuit ("driver").
conclusionOverdrive pacing from a site demonstrating regular activation during sustained POAF terminated the POAF by interrupting the reentrant circuit.
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