Arrhythmias & electrophysiology
Optimal cardiac rhythm during substrate mapping in scar-related ventricular tachycardia: Significance of wavefront direction on identifying critical sites
Authors' conclusion
The optimal rhythm for substrate mapping depends on the spatial distribution of the area of interest.
Study context
- Population
- Patients undergoing high-density substrate mapping and ablation of scar-related ventricular tachycardia (VT) (65 ± 15 years; 33% ischemic cardiomyopathy)71 maps
- Participants
- 46 patients
- Exposure
- Sinus vs right ventricular (RV)-paced vs left ventricular (LV)-paced vs biventricular-paced rhythm during substrate mapping
- Outcome
- Appearance of a rotational activation pattern (RAP) by rhythm
Methodological detailshigh-density substrate mapping
- High-density substrate mapping
Main finding
As reported in the abstract
RAP identified
Rotational activation pattern (RAP) identified in maps, where wavefronts from a single direction reached, not where wavefronts from multiple directions collided
24 of 71 maps
34%
Observational data: associations, not effects.
Further findings
RAP not evident in baseline map but apparent on remapping in other rhythm (wavefront reaching site earlier)
- Patients
- 13
Original publication
Optimal cardiac rhythm during substrate mapping in scar-related ventricular tachycardia: Significance of wavefront direction on identifying critical sites. Heart Rhythm. Published 1 March 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →