| CPC A61B 5/283 (2021.01) [A61B 5/6852 (2013.01); A61B 5/7225 (2013.01); G06F 17/18 (2013.01)] | 5 Claims |
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1. A system, comprising:
signal acquisition circuitry, which is configured to receive multiple intra-cardiac signals acquired by multiple electrodes of an intra-cardiac probe in a heart of a patient; and
a processor, which is configured to:
extract multiple annotation values from the intra-cardiac signals;
select a group of the intra-cardiac signals;
correct one or more of the annotation values in a given intra-cardiac signal, acquired by a given electrode in the group, to compensate for a displacement of the given electrode relative to the other electrodes in the group;
identify in the group one or more annotation values that are statistically deviant in the group by more than a predefined measure of deviation; and
visualize the annotation values to a user, excluding the statistically deviant annotation values;
wherein:
the annotation values comprise local activation times;
correcting one or more of the annotation values in the given intra-cardiac signal acquired by the given electrode in the group comprises:
calculating a correction based on the spatial position of the given electrode and a wave travel speed; and
removing deviation caused by propagation delay by applying the correction to the annotation value for the given electrode in the group;
and
visualizing the annotation values to the user comprises overlaying the annotation values on a model of the heart during a procedure in which the intra-cardiac signals were acquired.
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