US 12,167,917 B2
System and method for detection and mapping of near field conduction in scar tissue
Jatin Relan, Bordeaux (FR); Steven Kim, New York, NY (US); Mark Hagfors, North Oaks, MN (US); and Don Curtis Deno, Andover, MN (US)
Assigned to St. Jude Medical, Cardiology Division, Inc., St. Paul, MN (US)
Appl. No. 17/604,220
Filed by St. Jude Medical, Cardiology Division, Inc., St. Paul, MN (US)
PCT Filed May 7, 2020, PCT No. PCT/US2020/031775
§ 371(c)(1), (2) Date Oct. 15, 2021,
PCT Pub. No. WO2020/227469, PCT Pub. Date Nov. 12, 2020.
Claims priority of provisional application 62/845,433, filed on May 9, 2019.
Prior Publication US 2022/0202346 A1, Jun. 30, 2022
Int. Cl. A61B 5/367 (2021.01); A61B 5/287 (2021.01); A61B 5/339 (2021.01)
CPC A61B 5/367 (2021.01) [A61B 5/287 (2021.01); A61B 5/339 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A method of mapping local conductive activity in a lesion comprising:
receiving a plurality of electrophysiology (EP) data points at an electroanatomical mapping system including a high-density grid catheter and a display, wherein each EP data point of the plurality of EP data points includes electrophysiological signals measured by the high-density grid catheter;
computing, with the electroanatomical mapping system, a metric for each EP data point using the electrophysiological signals for the respective EP data point;
using the electroanatomical mapping system to define an optimized omnipole orientation for the respective EP data point using the electrophysiological signals for the respective EP data point by:
computing a plurality of omnipolar electrograms for the respective EP data point using the electrophysiological signals for the respective EP data point;
computing a plurality of scalograms corresponding to the plurality of omnipolar electrograms;
computing a plurality of peak-frequency functions corresponding to the plurality of scalograms; and
defining an orientation exhibiting a maximum peak frequency of the plurality of peak-frequency functions as the optimized omnipole orientation for the respective EP data point; and
outputting on the display a graphical representation that facilitates visualization of one or more conduction gaps in the lesion using the metrics.