Methods and systems for mapping local conduction velocity

摘要

The local conduction velocity of a cardiac activation wavefront can be computed by collecting a plurality of electrophysiology (“EP”) data points using a multi-electrode catheter, with each EP data point including both position data and local activation time (“LAT”) data. For any EP data point, a neighborhood of EP data points, including the selected EP data point and at least two additional EP data points, can be defined. Planes of position and LATs can then be defined using the positions and LATs, respectively, of the EP data points within the neighborhood. A conduction velocity can be computed from an intersection of the planes of positions and LATs. The resultant plurality of conduction velocities can be output as a graphical representation (e.g., an electrophysiology map), for example by displaying vector icons arranged in a uniform grid over a three-dimensional cardiac model.

主权项

1. A method of computing local conduction velocity of a cardiac activation wavefront, comprising:
collecting a plurality of electrophysiology (“EP”) data points using a multi-electrode catheter, each EP data point of the plurality of EP data points comprising position data and local activation time (“LAT”) data; repeating the following steps a plurality of times, thereby computing a plurality of conduction velocities:
selecting an EP data point from the plurality of EP data points;defining a neighborhood of EP data points including the selected EP data point and at least two additional EP data points from the plurality of EP data points; andcomputing a conduction velocity for the selected EP data point using the position data of the EP data points within the neighborhood of EP data points and the LAT data of the EP data points within the neighborhood of EP data points; and outputting a three-dimensional graphical representation of the plurality of conduction velocities, wherein the graphical representation includes a plurality of conduction velocity vector icons arranged in a uniform grid over a three-dimensional model of at least a portion of a heart.