Patent ID: 11857307
Assignee: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A method, comprising:
inserting a probe into a chamber of a heart of a human subject, the probe comprising at least two pairs of electrodes at a distal end thereof;
generating location signals indicative of location coordinates of the distal end of the probe;
acquiring from positions on a surface of the chamber respective electrical signals in response to a conduction wave traversing the surface;
processing the location signals to generate and present on a display a three-dimensional (3D) representation of the surface;
deriving respective local activation times (LATs) from the respective electrical signals at the positions on the surface;
calculating a first time difference between the respective LATs at a first pair of the positions on the surface and a second time difference between the respective LATs at a second pair of the positions on the surface;
calculating first and second LAT-derived distances as respective products of the first time difference and the second time difference with a conduction velocity of the conduction wave;
identifying an origin of an arrhythmia at a location on the surface such that a first difference in distances over the surface from the location to the first pair of the positions is equal to the first LAT-derived distance, and a second difference in distances over the surface from the location to the second pair of the positions is equal to the second LAT-derived distance;
marking the identified origin on the representation of the surface on the display;
generating a triangular mesh from the location coordinates, and wherein the distances over the surface comprise shortest distances measured along edges of the mesh;
covering the triangular mesh to form a smooth continuous 3D surface;
displaying a graphic representation of the smooth 3D surface on the display;
specifying equally spaced sample points on the triangular mesh; and
using the sample points to perform discrete calculations on the continuous 3D surface.