Arrhythmias & electrophysiology
Anatomic approach to mitral isthmus ablation guided by left atrial intracardiac echocardiography
Authors' conclusion
An anatomic approach to mitral isthmus ablation guided by left atrial ICE is feasible and safe, with high acute procedural success.
Study context
- Population
- Patients undergoing mitral isthmus ablation for mitral annular flutter
- Participants
- 30 patients
- Outcome
- Bidirectional mitral isthmus block (acute procedural success)
Methodological detailsstepwise approach
- Stepwise approach
Main finding
As reported in the abstract
Bidirectional mitral isthmus block achieved
29 of 30 cases
97%
Epicardial ablation through the great cardiac vein required
57%
n = 17 patients
Vein of Marshall (VOM) ethanol infusion required
43%
n = 13 patients
Further findings
Additional ablation required
- Epicardial ablation through the great cardiac vein
- 57% (n = 17)
- VOM ethanol infusion
- 43% (n = 13)
Mitral isthmus anatomy by intracardiac echocardiography (ICE)
- Mean length
- 32.5 ± 5.4 mm
- Depth
- 6.0 ± 2.9 mm
- Mean thickness
- 4.5 ± 0.5 mm
Recurrent atrial arrhythmias · follow-up 19 ± 9 months
- Patients with recurrence
- 13
- 12-month survival free of arrhythmias
- 60%
Safety
- Pericardial effusion
- 1 case (3%)
Original publication
Anatomic approach to mitral isthmus ablation guided by left atrial intracardiac echocardiography. Heart Rhythm. Published 25 April 2025. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →