Electroanatomical map re-annotation

An apparatus for electroanatomical map re-annotation, the apparatus comprising:

• a display;
• and
• a processor configured:
• to receive, from an intracardiac catheter having a distal end comprising a plurality of electrodes positioned at respective locations within a heart of a subject, signals from the electrodes responsive to electrical activity in myocardial tissue with which the electrodes are in contact,
• to process the signals so as to identify, for each given location contacted by the electrodes, at least one corresponding local activation time (LAT) in a cycle of the heart,
• to identify, for each of the locations, an earliest LAT in the cycle,
• to generate and render to the display an electroanatomical map comprising mapping points having respective locations and showing the earliest LAT at each location in the map, wherein the electroanatomical map comprises a physical map of a chamber of the heart and the LAT values are incorporated into the physical map,
• to receive an input selecting a subset of the mapping points,
• to identify a time range for the subset based upon the received input selection, the time range containing the earliest LAT of a majority of the mapping points in the selected subset,
• to identify one or more outlying mapping points in the selected subset for which the earliest LAT precedes the identified time range,
• to find, among the at least one LAT identified at the outlying mapping points in the selected subset, a respective second LAT, later than the earliest LAT in the cycle of the heart, and
• to update and render the electroanatomical map to display the respective second LAT that was found at the one or more of the outlying mapping points in the selected subset thereby automatically correcting any mapping points in selected subset, wherein the updated electroanatomical map, presented on the display, enables user correction of mapping points.

A computer software product, operated in conjunction with an intracardiac catheter having a distal end comprising a plurality of electrodes for insertion into a heart of a subject, the product comprising a non-transitory computer-readable medium, in which program instructions are stored, which instructions, when read by a computer, cause the computer:

• to receive, from the plurality of electrodes positioned at respective locations within the heart of the subject, signals from the electrodes responsive to electrical activity in myocardial tissue with which the electrodes are in contact;
• to process the signals so as to identify, for each given location contacted by the electrodes, at least one corresponding local activation time (LAT) in a cycle of the heart;
• to identify, for each of the locations, an earliest LAT in the cycle;
• to generate and render to the display an electroanatomical map comprising mapping points having respective locations and showing the earliest LAT at each location in the map, wherein the electroanatomical map comprises a physical map of a chamber of the heart and the LAT values are incorporated into the physical map;
• to receive an input selecting a subset of the mapping points;
• to identify a time range for the subset based upon the received input selection, the time range containing the earliest LAT of a majority of the mapping points in the selected subset;
• to identifying one or more outlying mapping points in the selected subset for which the earliest LAT precedes the identified time range;
• to find, among the at least one LAT identified at the outlying mapping points in the selected subset, a respective second LAT, later than the earliest LAT in the cycle of the heart;
• and
• to update and render the electroanatomical map to display the respective second LAT that was found at the one or more of the outlying mapping points in the selected subset thereby automatically correcting any mapping points in selected subset, wherein the updated electroanatomical map, presented on the display, enables user correction of mapping points.