US 12,465,269 B2
Visualization of ventricular tachycardia causing reentrant circuits via pseudo-activation maps
Philip Hoyland, Issy-les-Moulineaux (FR); Freddy Odille, Villers-les-Nancy (FR); and Christian de Chillou de Churet, Marly (FR)
Assigned to Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed by Johnson & Johnson Medical SAS, Issy-les-Moulineaux (FR); L'Université de Lorraine, Nancy (FR); and The Centre Hospitalier Regional Universitaire de Nancy, Nancy (FR)
Filed on Apr. 19, 2022, as Appl. No. 17/724,146.
Claims priority of provisional application 63/179,054, filed on Apr. 23, 2021.
Prior Publication US 2022/0338784 A1, Oct. 27, 2022
Int. Cl. A61B 5/367 (2021.01); A61B 5/00 (2006.01); G06T 17/20 (2006.01)
CPC A61B 5/367 (2021.01) [A61B 5/7246 (2013.01); G06T 17/20 (2013.01); G06T 2210/41 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for visualizing a reentrant circuit in a heart of a patient that improves target identification during a tachycardia (VT) ablation, the method comprising:
receiving a plurality of sets of electrocardiogram (ECG) data from one or more sensors of a catheter that is located in the heart of the patient, wherein each of the plurality of the sets of ECG data is generated by the catheter pacing tissue of the heart at a respective site among plurality of pacing sites in the heart;
computing correlation gradients representative of morphological changes across sets, of the sets of the ECG data, of respective neighboring sites among the plurality of the pacing sites;
identifying, based on the correlation gradients, a core zone associated with the reentrant circuit;
generating a pseudo-activation map relative to the core zone of the reentrant circuit that identifies an orientation of the reentrant circuit, wherein the generating of the pseudo-activation map relative to the core zone comprises:
generating a plurality of pseudo-activation maps, each with respect to a pacing site associated with the core zone; and
combining the plurality of the pseudo-activation maps;
generating a 3D surface mesh based on the plurality of pacing sites, wherein the plurality of pacing sites form nodes of a graph and respective pairs of the plurality of pacing sites are linked by edges of the graph; and
displaying the pseudo-activation map overlayed on the 3D surface mesh during the VT ablation.