Key result
Varying ventricular activation wavefronts during voltage mapping shows ~22% variability in bipolar scar areas.
Why the study?
Does varying the ventricular activation wavefront alter myocardial scar characterization in patients with scar-related ventricular tachycardia?
Observational (n=29)
Does varying the ventricular activation wavefront alter myocardial scar characterization in patients with scar-related ventricular tachycardia?
Mapping with alternate activation wavefronts reveals significant variability in ventricular scar characterization, potentially improving the detection of arrhythmogenic substrates.
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Wavefront-dependent scar variability warrants caution in single-map VT assessment; leaves open whether multi-wavefront protocols improve substrate detection.
Tung et al. (2016) conducted an observational in Scar-related ventricular tachycardia (n=29). Voltage mapping during different wavefronts of activation vs. Alternate activation wavefronts was evaluated on Bipolar and unipolar low-voltage areas and concordance between wavefronts. Varying the ventricular activation wavefront during voltage mapping resulted in 22% and 14% variability in median bipolar and unipolar scar areas, with lower concordance in mixed versus dense scars.
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