Arrhythmias & electrophysiology
Magnetic resonance assessment of left atrial scar formation following a novel very high-power short-duration workflow for atrial fibrillation ablation
Authors' conclusion
Pulmonary vein isolation following a novel vHPSD workflow resulted in short procedure duration and high acute and mid-term efficacy. Magnetic resonance imaging demonstrated durable and transmural PV lesions with homogeneous and contiguous scar formation.
Study context
- Population
- Consecutive atrial fibrillation (AF) patients undergoing index pulmonary vein isolation30 underwent magnetic resonance imaging (MRI)
- Participants
- 60 patients
- Outcome
- Procedural data and left atrial (LA) scar on late gadolinium enhancement MRI
- Follow-up
- MRI 3 months after ablation
Methodological detailsconsecutive patients, single group
- Consecutive patients
- Single group
Main finding
As reported in the abstract
MRI 3 months after ablation
- Mean procedural duration
- 66.5 ± 14.8 min
- Mean ablation time
- 4.7 ± 0.9 min
- Mean number of applications
- 69.9 ± 14.2
- First-pass isolation, right pulmonary veins (PVs)
- 51 (85%)
- First-pass isolation, left PVs
- 37 (61.7%)
- First-pass isolation, both PVs
- 34 (56.7%)
- Mean scar width around right PVs (MRI)
- 14.4 ± 2.6 mm
- Mean scar width at left PVs (MRI); right vs left P > 0.05
- 11.9 ± 1.9 mm
- Complete PV encirclement, right PVs
- 76.7%
- Complete PV encirclement, left PVs
- 76.7%
- Complete PV encirclement, both PV pairs
- 66.7%
Observational data: associations, not effects.
Further findings
Arrhythmia recurrence · mean follow-up 4.7 ± 1.4 months
- Arrhythmia recurrence
- 3.3%
Original publication
Magnetic resonance assessment of left atrial scar formation following a novel very high-power short-duration workflow for atrial fibrillation ablation. Europace. Published 23 February 2023. doi:10.
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