US 12,324,671 B2
System, method, and apparatus for mapping local activation times
Jatin Relan, Bordeaux (FR); and Valtino X. Afonso, Oakdale, MN (US)
Assigned to St. Jude Medical, Cardiology Division, Inc., St. Paul, MN (US)
Appl. No. 17/911,605
Filed by St. Jude Medical, Cardiology Divsion, Inc., St. Paul, MN (US)
PCT Filed Dec. 22, 2020, PCT No. PCT/US2020/066535
§ 371(c)(1), (2) Date Sep. 14, 2022,
PCT Pub. No. WO2021/188182, PCT Pub. Date Sep. 23, 2021.
Claims priority of provisional application 62/990,267, filed on Mar. 16, 2020.
Prior Publication US 2023/0119399 A1, Apr. 20, 2023
Int. Cl. A61B 5/339 (2021.01); A61B 5/00 (2006.01); A61B 5/347 (2021.01); A61B 5/367 (2021.01)
CPC A61B 5/339 (2021.01) [A61B 5/347 (2021.01); A61B 5/367 (2021.01); A61B 5/7203 (2013.01); A61B 5/7221 (2013.01); A61B 5/7475 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of graphically representing local activation time (LAT), the method comprising:
receiving from a multi-electrode electrophysiology catheter, at an electroanatomical mapping system, the electroanatomical mapping system including a display, an LAT data set comprising a plurality of electrophysiology (EP) data points, wherein each EP data point of the plurality of EP data points includes localization information and an electrogram signal;
the electroanatomical mapping system computing a spatial gradient over a spatial kernel centered at an EP data point of the plurality of EP data points of the LAT data set;
the electroanatomical mapping system computing a respective temporal gradient for each of the plurality of EP data points of the LAT data set, thereby computing a plurality of temporal gradients;
the electroanatomical mapping system detecting a spatial outlier EP data point within the spatial kernel using the spatial gradient;
the electroanatomical mapping system detecting a temporal outlier EP data point using the plurality of temporal gradients;
the electroanatomical mapping system correcting the spatial outlier EP data point and the temporal outlier EP data point, thereby creating a corrected LAT map; and
the electroanatomical mapping system outputting to the display a graphical representation of the corrected LAT map on a model of a cardiac surface.