Arrhythmias & electrophysiology
Idiopathic ventricular arrhythmia originating from the vicinity of lateral tricuspid annulus: The precise origin and anatomic concerns
Authors' conclusion
The ventricular side adjacent to the lateral TA exhibits a subvalvular enfoldment-like structure, which is rich in muscular bundles and serves as the origin of TA-VAs in most patients. To reach the origins, a reverse technique is required.
Study context
- Population
- Patients with idiopathic ventricular arrhythmias (VAs) from the lateral tricuspid annulus
- Participants
- 63 patients
- Outcome
- Precise origin of lateral TA-VAs
Methodological detailsconsecutive patients, 3D mapping with intracardiac echocardiography (ICE) for anatomic reconstruction, mapping and ablation; reverse-curve catheter retroflexion needed to reach ventricular side of tricuspid annulus (TA)
- Consecutive patients
- 3D mapping with ICE for anatomic reconstruction, mapping and ablation; reverse-curve catheter retroflexion needed to reach ventricular side of TA
Main finding
As reported in the abstract
- Muscular bundle within the subvalvular enfoldment
- 100%
- Muscular bundles, mean number
- 4 ± 2
- Muscular bundle diameter
- 4.10 ± 0.73 mm
- Earliest activation site at valvular end of muscular bundles
- 51 of the 63 patients (80.9%)
- Local activation time
- −26.78 ± 4.63 ms
Observational data: associations, not effects.
Further findings
Initial ablation via anterograde approach
- Attempted
- 15 patients
- Succeeded
- 0
Ablation time to VA elimination
- Mean ablation time
- 4 ± 2 seconds
Original publication
Idiopathic ventricular arrhythmia originating from the vicinity of lateral tricuspid annulus: The precise origin and anatomic concerns. Heart Rhythm. Published 23 July 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →