Visual route indication for activation clusters

Patent metadata

Field	Value
Publication number	US-11607272-B2
Application number	US-201916681411-A
Country	US
Kind code	B2
Filing date	Nov 12, 2019
Priority date	Nov 12, 2019
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

Methods, apparatus, and systems for medical procedures are disclosed herein and include receiving a first electrical activity at a first time for a plurality of points on an intrabody surface. A first cluster of points is identified from the plurality of points, based on the first electrical activity, the first cluster of points each exhibiting electrical activity above an activity threshold. A second electrical activity is received at a second time for the plurality of points on the intra-body surface. A second cluster of points is identified from the plurality of points, based on the second electrical activity. The first cluster of points and the second cluster of points are determined to be related based on a propagation threshold. A first visual indication for a first propagation route is provided from the first cluster of points to the second cluster of points.

First claim

The invention claimed is:

1. A method for improving intra-body visualization, the method comprising:
sending, via at least one electrode, at least one electrical signal;
receiving first electrical activity at a first time for a plurality of points on an intra-body surface, based on movement of the at least one electrical signal through the intra-body surface;
identifying a first cluster of points from the plurality of points, based on the first electrical activity, the first cluster of points each exhibiting electrical activity above an activity threshold;
sending, via the at least one electrode, at least one second electrical signal;
receiving second electrical activity at a second time in a second location for the plurality of points on the intra-body surface, based on movement of the at least one second electrical signal through the intra-body surface;
identifying a second cluster of points from the plurality of points, based on the second electrical activity, the second cluster of points each exhibiting electrical activity above the activity threshold;
determining that the first cluster of points and the second cluster of points are related based on a propagation threshold distance; and
providing a first visual indication for a first propagation route from the first cluster of points to the second cluster of points based on determining that they are related, wherein
the first visual indication is mapping created from at least the first electrical activity and the second electrical activity,
the propagation threshold distance is a distance based on a propagation velocity between at least the first electrical activity at the first cluster of points and the second electrical activity at the second cluster of points multiplied by a difference between the first time and the second time,
on a condition that a distance between the first cluster of points and the second cluster of points is greater than the propagation threshold distance, the first cluster of points and the second cluster of points are not related, and
on a condition that the distance between the first cluster of points and the second cluster of points is less than or equal to the propagation threshold distance, the first cluster of points and the second cluster of points are related.

2. The method of claim 1 , wherein identifying the first cluster of points is based on a proximity of a first point of the plurality of points to a second point of the plurality of points being within a threshold proximity.

3. The method of claim 2 , wherein identifying the first cluster of points is further based on identifying an outlier point that is over the threshold proximity from the first point and the second point such that the outlier point is excluded from the first cluster of points.

4. The method of claim 1 , further comprising displaying the first visual indication of the first propagation route.

5. The method of claim 1 , wherein the first visual indication of the first propagation route is an arrow starting at the first cluster of points and ending at the second cluster of points.

6. The method of claim 1 , further comprising:
sending, via the at least one electrode, at least one third electrical signal;
receiving third electrical activity at a third time for the plurality of points on an intra-body surface, based on movement of the at least one third electrical signal through the intra-body surface;
identifying a third cluster of points from the plurality of points, the third cluster of points each exhibiting electrical activity above the activity threshold;
determining that the second cluster of points and the third cluster of points are related based on the propagation threshold distance; and
providing a second visual indication of a second propagation route from the second cluster of points to the third cluster of points based on determining that the second cluster of points and the third cluster of points are related.

7. The method of claim 6 , further comprising determining a rotor pattern based on first propagation route and the second propagation route.

8. The method of claim 1 , further comprising:
sending, via the at least one electrode, at least one third electrical signal;
receiving third electrical activity at a third time for the plurality of points on an intra-body surface, based on movement of the at least one third electrical signal through the intra-body surface;
identifying a third cluster of points from the plurality of points, the third cluster of points each exhibiting electrical activity above the activity threshold;
determining that the first cluster of points and the third cluster of points are related based on the propagation threshold distance; and
providing a second visual indication of a second propagation route from the first cluster of points to the third cluster of points based on determining that the first cluster of points and the third cluster of points are related.

9. The method of claim 8 , further comprising displaying the first visual indication of the first propagation route and the second visual indication of the second propagation route.

10. A system for improving intra-body visualization, the system comprising: a probe configured to:
send at least one first electrical signal and at least one second electrical signal;
sense first electrical activity at a first time for a plurality of points on an intra-body surface, based on movement of the at least one electrical signal through the intra-body surface and second electrical activity at a second time for the plurality of points, based on movement of the at least one second electrical signal through the intra-body surface;
a processor configured to;
identify a first cluster of points from the plurality of points, the first cluster of points each exhibiting electrical activity above an activity threshold;
identify a second cluster of points from the plurality of points, the second cluster of points each exhibiting electrical activity above the activity threshold;
determine that the first cluster of points and the second cluster of points are related based on a propagation threshold distance; and
provide a first visual indication of a first propagation route from the first cluster of points to the second cluster of points based on determining that they are related, wherein

the first visual indication is mapping created from at least the first electrical activity and the second electrical activity,
the propagation threshold distance is a distance based on a propagation velocity between at least the first electrical activity at the first cluster of points and the second electrical activity at the second cluster of points multiplied by a difference between the first time and the second time,
on a condition that a distance between the first cluster of points and the second cluster of points is greater than the propagation threshold distance, the first cluster of points and the second cluster of points are not related, and
on a condition that the distance between the first cluster of points and the second cluster of points is less than or equal to the propagation threshold distance, the first cluster of points and the second cluster of points are related.

11. The system of claim 10 , wherein identifying the first cluster of points is based on a proximity of the points in the first cluster of points to each other.

12. The system of claim 11 , wherein identifying the first cluster is further is based on identifying an outlier point that is over a threshold distance from the first cluster of points.

13. The system of claim 10 , further comprising a display configured to render the

Assignees

• Biosense Webster Israel Ltd

Inventors

• Katz Natan Sharon
• Cohen Benjamin
• Zar Lior
• Turgeman Aharon

Classifications

• A61B18/14

  Probes or electrodes therefor · CPC title

• A61B5/287

  Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS] · CPC title

• A61B2034/107

  Visualisation of planned trajectories or target regions · CPC title

• A61B5/6858

  with a distal basket, e.g. expandable basket · CPC title

• A61B34/10 Primary

  Computer-aided planning, simulation or modelling of surgical operations · CPC title