System, method, and apparatus for visualizing cardiac timing information using animations
View Patent ↗An animated electrophysiology map is generated from a plurality of data points, each including measured electrophysiology information, location information, and timing information. The electrophysiology and location information can be used to generate the electrophysiology map, such as a local activation time, peak-to-peak voltage, or fractionation map. Animated timing markers can be superimposed upon the electrophysiology map using the electrophysiology, location, and timing information. For example a series of frames can be displayed sequentially, each including a static image of the electrophysiology map at a point in time and timing markers corresponding to the state or position of an activation wavefront at the point in time superimposed thereon. The visibility or opacity of the timing markers can be adjusted from frame to frame, dependent upon a distance between the timing marker and the activation wavefront, to give the illusion that the timing markers are moving along the electrophysiology map.
1 . A system for generating an animated map of a cardiac activation wavefront, comprising a computer configured to:
receive a plurality of data points, wherein each data point of the plurality of data points comprises location information and activation timing information;
display a model of a portion of a cardiac surface; and
sequentially display, on the model of the portion of the cardiac surface, a plurality of time markers corresponding to the plurality of data points over a playback time period,
wherein, for each time marker of the plurality of time markers, a time marker visibility is determined by a difference between the activation timing information for a respective data point of the plurality of data points and a point in time during the playback period, such that the time marker for the respective data point of the plurality of data points is visible only when the difference between the activation timing information for the respective data point and the point in time during the playback time period is below a preset threshold.
2 . The system according to claim 1 , wherein, for each time marker of the plurality of time markers:
the time marker has a maximum visibility time during the playback time period when the activation timing information for the respective data point matches the point in time during the playback period,
the time marker fades in starting at a fade in initiation time preceding the maximum visibility time, and
the time marker fades out starting at the maximum visibility time and ending at a fade out completion time following the maximum visibility time.
3 . The system according to claim 2 , wherein the fade in initiation time precedes the maximum visibility time by a first time period.
4 . The system according to claim 3 , wherein the fade out completion time follows the maximum visibility time by a second time period longer than the first time period.
5 . The system according to claim 1 , wherein the model of the portion of the cardiac surface comprises an electrophysiology map of the portion of the cardiac surface.
6 . The system according to claim 5 , wherein the electrophysiology map comprises one or more of:
a local activation time map;
a peak-to-peak voltage map; and
a complex fractionated electrogram map.
7 . A method of generating an animated cardiac activation map, comprising:
receiving a plurality of data points, each data point comprising location information and timing information;
generating a series of frames, each frame of the series of frames comprising:
a static image of a cardiac geometry at a point in time; and
one or more timing markers superimposed upon the static image of the cardiac geometry, wherein each of the one or more timing markers has a visibility determined by a difference between the timing information for a respective data point of the plurality of data points coinciding with a position of the respective timing marker on the static image of the cardiac geometry and the point in time, such that the respective time marker is visible only when the difference between the timing information for the respective data point and the point in time is below a preset threshold; and
displaying the series of frames in chronological sequence.
8 . The method according to claim 7 , wherein:
the visibility of the respective time marker is at a maximum when the activation timing information for the respective data point matches the point in time,
the visibility of the respective time marker increases over a fade in period preceding the point in time, and
the visibility of the respective time marker fades over a fade out period following the point in time.
9 . The method according to claim 8 , wherein the fade out period is longer than the fade in period.
10 . The method according to claim 7 , wherein each frame of the series of frames further comprises a static image of an electrophysiology map at the point in time superimposed upon the static image of the cardiac geometry at the point in time.
11 . The method according to claim 10 , wherein the electrophysiology map comprises one or more of:
a local activation time map;
a peak-to-peak voltage map; and
a complex fractionated electrogram map.