Slow pathway elimination using antegrade conduction improvement with fast atrial pacing during AVNRT radiofrequency ablation : a proof-of-concept study
BACKGROUND: Radiofrequency (RF) ablation of slow pathway (SP) is usually performed in sinus rhythm while monitoring the occurrence of a slow junctional rhythm (JR). JR although sensitive, is not specific for elimination of SP conduction. Our objective was to prospectively evaluate feasibility and safety of SP elimination using fast atrial rate pacing (FAP) during RF delivery.
METHODS: Consecutive patients admitted for atrioventricular nodal re-rentrant tachycardia (AVNRT) ablation were included. The rate of proximal coronary sinus (CS) pacing was set to a value constantly yielding antegrade SP conduction, while carefully monitoring the AH interval. RF delivery (at the lower part of Koch's triangle) was considered successful if the AH shortened ≥ 14 ms or if transition from Wenckebach (WK) periods to a 1:1 conduction occurred.
RESULTS: 24 patients were included (54 ± 20 y). Typical AVNRT was induced in all (cycle length 349 ± 83 ms). RF delivery during CS pacing (335 ± 73 ms) led to AH shortening by 51 ± 25 ms in 13 patients. In 10 patients, a transition from 3:2 or 4:3 WK periods to 1:1 conduction occurred during the successful pulse. In one patient, atrial fibrillation was systematically induced during FAP, requiring conventional ablation. Non-inducibility, and SP conduction disappearance was obtained in all patients. No patient developed AV block. After a follow-up of 12 ± 3 months, no recurrences were observed.
CONCLUSION: SP ablation using FAP during RF delivery allows direct visualisation of its disappearance. In our cohort of patients, this technique was feasible without safety compromise.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:77 |
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| Enthalten in: |
Acta cardiologica - 77(2022), 6 vom: 02. Aug., Seite 524-531 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Bun, Sok-Sithikun [VerfasserIn] |
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| Links: |
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| Themen: |
Atrioventricular nodal re-entrant tachycardia |
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| Anmerkungen: |
Date Completed 15.11.2022 Date Revised 15.11.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1080/00015385.2021.1965355 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM329560026 |
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| 245 | 1 | 0 | |a Slow pathway elimination using antegrade conduction improvement with fast atrial pacing during AVNRT radiofrequency ablation |b a proof-of-concept study |
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| 500 | |a Date Completed 15.11.2022 | ||
| 500 | |a Date Revised 15.11.2022 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a BACKGROUND: Radiofrequency (RF) ablation of slow pathway (SP) is usually performed in sinus rhythm while monitoring the occurrence of a slow junctional rhythm (JR). JR although sensitive, is not specific for elimination of SP conduction. Our objective was to prospectively evaluate feasibility and safety of SP elimination using fast atrial rate pacing (FAP) during RF delivery | ||
| 520 | |a METHODS: Consecutive patients admitted for atrioventricular nodal re-rentrant tachycardia (AVNRT) ablation were included. The rate of proximal coronary sinus (CS) pacing was set to a value constantly yielding antegrade SP conduction, while carefully monitoring the AH interval. RF delivery (at the lower part of Koch's triangle) was considered successful if the AH shortened ≥ 14 ms or if transition from Wenckebach (WK) periods to a 1:1 conduction occurred | ||
| 520 | |a RESULTS: 24 patients were included (54 ± 20 y). Typical AVNRT was induced in all (cycle length 349 ± 83 ms). RF delivery during CS pacing (335 ± 73 ms) led to AH shortening by 51 ± 25 ms in 13 patients. In 10 patients, a transition from 3:2 or 4:3 WK periods to 1:1 conduction occurred during the successful pulse. In one patient, atrial fibrillation was systematically induced during FAP, requiring conventional ablation. Non-inducibility, and SP conduction disappearance was obtained in all patients. No patient developed AV block. After a follow-up of 12 ± 3 months, no recurrences were observed | ||
| 520 | |a CONCLUSION: SP ablation using FAP during RF delivery allows direct visualisation of its disappearance. In our cohort of patients, this technique was feasible without safety compromise | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Slow pathway elimination | |
| 650 | 4 | |a atrioventricular nodal re-entrant tachycardia | |
| 650 | 4 | |a radiofrequency ablation | |
| 650 | 4 | |a rapid atrial pacing | |
| 700 | 1 | |a Wedn, Ahmed Mostfa |e verfasserin |4 aut | |
| 700 | 1 | |a Taher, Ahmed |e verfasserin |4 aut | |
| 700 | 1 | |a Taghji, Philippe |e verfasserin |4 aut | |
| 700 | 1 | |a Squara, Fabien |e verfasserin |4 aut | |
| 700 | 1 | |a Hasni, Karim |e verfasserin |4 aut | |
| 700 | 1 | |a De Zuloaga, Claudio |e verfasserin |4 aut | |
| 700 | 1 | |a Ferrari, Emile |e verfasserin |4 aut | |
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