Valvular & structural heart disease
Linear Ablation at the Mitral Isthmus Following Mitral Valve Surgery
Authors' conclusion
EIVOM and mitral isthmus ablation are feasible and acutely successful after mitral valve surgery.
Study context
- Population
- Patients with prior mitral valve surgery undergoing EIVOM and mitral isthmus ablation
- Exposure
- Mitral valve-operated patients vs propensity score-matched control group
- Control groupn = 72
- Outcome
- EIVOM success
Methodological detailsconsecutive patients, propensity-weighted analysis
- Consecutive patients
- Propensity-weighted analysis
Main finding
As reported in the abstract
EIVOM successful (study group)
92.6%
Observational data: associations, not effects.
Further findings
EIVOM success rate (propensity-weighted)
Acutely unblocked mitral isthmus
Freedom from atrial tachycardia/atrial fibrillation · 1 year
- EIVOM success rate (propensity-weighted): P = 0.76
- Acutely unblocked mitral isthmus: P = 0.073
- Freedom from atrial tachycardia/atrial fibrillation: P = 0.12
Acute mitral isthmus block
- Acute mitral isthmus block achieved (study group)
- 88.9%
Baseline characteristics (study group)
- Mean age
- 64 ± 12 years
- Mean left atrial volume index
- 56 ± 18 mL/m²
- Male
- 53.7%
- Mitral valve replacement
- 74.1%
- Mechanical valves, of those with mitral valve replacement
- 52.5%
Safety
VOM dissection
- VOM dissection: P = 0.30
Original publication
Linear Ablation at the Mitral Isthmus Following Mitral Valve Surgery. JACC Clin Electrophysiol. Published 3 July 2025. doi:10.
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