System and method for mapping local activation times
AssigneeSt. Jude Medical, Cardiology Division, Inc.
InventorCraig Markovitz
Life of this patent
Estimating the term…
Abstract
Local activation times (LATs) are mapped by computing an LAT range for a plurality of electrophysiology data points, splitting the LAT range into two or more LAT sub-ranges, splitting the LAT map into a corresponding number of LAT sub-maps, and associating a mapping sub-convention (e.g., a color spectrum, grayscale, and/or pattern density range) with each of the LAT sub-maps. The mapping sub-conventions can be scaled (e.g., linearly, logarithmically) to their respective LAT sub-ranges, allowing for an overall LAT map that offers increased granularity over LAT sub-ranges of particular interest to the practitioner. The LAT sub-maps can be updated in real time as additional electrophysiology data points are collected.
Claims19
A method of mapping local activation times from a plurality of electrophysiology data points, the method comprising:
- computing an LAT range for the plurality of electrophysiology data points;
- splitting the LAT range into at least a first LAT sub-range and a second LAT sub-range;
- defining at least a first subset of the plurality of electrophysiology data points falling within the first LAT sub-range and a second subset of the plurality of electrophysiology data points falling within the second LAT sub-range;
- and
- generating at least a first LAT sub-map of the first subset of the plurality of electrophysiology data points using a first mapping sub-convention and a second LAT sub-map of the second subset of the plurality of electrophysiology data points using a second mapping sub-convention,
- wherein the first mapping sub-convention is continuous with the second mapping sub-convention,
- the first mapping sub-convention is scaled to the first LAT sub-range,
- the second mapping sub-convention is scaled to the second LAT sub-range, and
- the scale of the first mapping sub-convention to the first LAT sub-range differs from the scale of the second mapping sub-convention to the second LAT sub-range.
A method of mapping local activation times, comprising:
- receiving an LAT map for at least a portion of a heart, wherein the LAT map is associated with a mapping convention;
- computing an LAT range for the LAT map;
- splitting the LAT range into a plurality of LAT sub-ranges;
- and
- splitting the LAT map into a plurality of LAT sub-maps, wherein a number of LAT sub-maps corresponds to a number of LAT sub-ranges,
- wherein each LAT sub-map of the plurality of LAT sub-maps is associated with a respective mapping sub-convention of a plurality of mapping sub-conventions,
- wherein the plurality of mapping sub-conventions are continuous and collectively comprise the mapping convention,
- wherein each mapping sub-convention of the plurality of mapping sub-conventions is scaled to a respective LAT sub-map of the plurality of LAT sub-maps, and
- wherein a first scale of a first mapping sub-convention of the plurality of mapping sub-conventions to a respective first LAT sub-map differs from a second scale of a second mapping sub-convention of the plurality of mapping sub-conventions to a respective second LAT sub-map.
A system for mapping local activation times, comprising:
- a mapping processor configured to:
- receive as input an LAT map for at least a portion of a heart, wherein the LAT map is associated with a mapping convention;
- compute an LAT range for the LAT map;
- split the LAT range into a plurality of LAT sub-ranges;
- and
- split the LAT map into a plurality of LAT sub-maps, wherein a number of LAT sub-maps corresponds to a number of LAT sub-ranges, wherein each LAT sub-map of the plurality of LAT sub-maps is associated with a respective mapping sub-convention of a plurality of mapping sub-conventions,
- wherein a scale of a first mapping sub-convention of the plurality of mapping sub-conventions to a respective first LAT sub-map of the plurality of LAT sub-maps differs from a scale of a second mapping sub-convention of the plurality of mapping sub-conventions to a respective second LAT sub-map of the plurality of LAT sub-maps.
Dependencies are inferred from the claim text.