Key result
Functional propagation mapping targeting deceleration zones prevents ICD therapies in two scar-related VT cases.
Why the study?
The optimal method to identify the arrhythmogenic substrate of scar-related ventricular tachycardia is unknown.
Does voltage-independent functional propagation mapping (ILAM) prevent VT recurrence in patients with scar-related ventricular tachycardia?
Case Report (n=2)
No
Does voltage-independent functional propagation mapping (ILAM) prevent VT recurrence in patients with scar-related ventricular tachycardia?
A voltage-independent functional propagation mapping strategy during sinus rhythm may help guide functional substrate ablation of scar-related VT and reduce the need for extensive radiofrequency lesions.
May support functional substrate ablation in scar-related VT; hypothesis-generating and requires prospective validation.
The optimal method to identify the arrhythmogenic substrate of scar-related ventricular tachycardia (VT) is unknown. Sites of activation slowing during sinus rhythm (SR) often co-localize with the VT circuit. This is a report of two scar related VT substrate mapping using a strategy of voltage-independent approach.
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Lovatto et al. (2020) conducted a case report in Scar-related ventricular tachycardia (n=2). Voltage-independent functional propagation mapping (ILAM) guided ablation was evaluated on ICD therapies during follow-up. A voltage-independent functional propagation mapping strategy targeting deceleration zones successfully prevented ICD therapies during a 1-month follow-up in two patients with scar-related ventricular tachycardia.
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