Arrhythmias & electrophysiology
Identification of Human Ventricular Tachycardia Demarcated by Fixed Lines of Conduction Block in a 3-Dimensional Hyperboloid Circuit
Authors' conclusion
The majority of VT circuit boundaries can be identified as fixed LOB from intrinsic or paced activation during sinus rhythm.
Study context
- Population
- Patients undergoing catheter ablation for scar-related ventricular tachycardia (VT) (42% nonischemic cardiomyopathy)175 VT activation maps
- Participants
- 106 patients
- Outcome
- Correlation of lines of conduction block (LOB) during baseline rhythm or pacing with VT isthmus boundaries
Methodological detailsmulticentre (3 centres)
- Multicentre (3 centres)
Main finding
As reported in the abstract
- Deceleration zones with overt LOB during baseline rhythm (of 202)
- 47%
- Concealed LOB unmasked by differential pacing in deceleration zones without overt LOB (n=38)
- 84%
- Lateral boundaries colocalized with LOB in 2D VT (152 maps: 2D=53, 3D=99)
- 69%
- Depth boundary colocalized with LOB in 3D VT
- 79%
- Isthmus boundaries identifiable as fixed LOB during baseline rhythm or differential pacing
- 74%
Original publication
Identification of Human Ventricular Tachycardia Demarcated by Fixed Lines of Conduction Block in a 3-Dimensional Hyperboloid Circuit. Circulation. Published 28 August 2023. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →