Cardiac mapping system and method for bi-directional activation detection of electrograms
AssigneeSt. Jude Medical, Cardiology Division, Inc.
InventorsChin-Ann Yang, Valtino X. Afonso
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Abstract
In a system and computer implemented method for mapping of an anatomic structure and bi-directional activation detection of electrograms such as atrial and/or ventricular electrograms, both positive and negative deflections of an electrogram signal are analyzed over an analysis time period of the signal. At least one characteristic of the electrogram signal is determined based at least in part on analyzing both positive and negative deflections of the signal over the analysis time period. The determined at least one characteristic of the atrial electrogram signal is then associated with a generated three-dimensional model of the anatomic structure.
Claims12
A computer implemented method for analyzing an electrogram signal, the computer implemented method comprising:
- receiving, at a computing device, the electrogram signal from at least one electrode;
- analyzing both positive and negative deflections of said signal over an analysis time period of said signal;
- determining at least one characteristic of said signal based at least in part on analyzing both positive and negative deflections of said signal over said analysis time period, wherein determining at least one characteristic of said signal comprises:
- determining time locations of a plurality of cardiac activations over said analysis time period of said signal;
- determining a mean time between successive time locations of the plurality of cardiac activations;
- applying a boundary condition criteria to the determination of time locations of the plurality of cardiac activations at a beginning and end of said analysis time period of said signal;
- and
- recalculating the mean time between successive time locations of the plurality of cardiac activations following application of the boundary condition criteria;
- and
- associating the at least one characteristic of the electrogram signal with one or more positions of the at least one electrode over said analysis time period.
A system for mapping electrode data to a three-dimensional model of an atrial anatomic structure, the system comprising:
- at least one electrode that is positionable relative to the atrial anatomic structure;
- and
- a computing device configured to receive atrial electrogram signals from the at least one electrode, the computing device comprising:
- a processor;
- and
- computer-executable instructions that, when executed by the processor, cause the computing device to:
- analyze both positive and negative deflections of an atrial electrogram signal over an analysis time period of said signal;
- and
- determine at least one characteristic of said signal based at least in part on analyzing both positive and negative deflections of said signal over said analysis time period by:
- determining cardiac activation locations of said signal based at least in part on analyzing both positive and negative deflections of said signal over said analysis time period;
- determining a mean interval between cardiac activation locations;
- applying a boundary condition criteria to the determination of cardiac activation locations at a beginning and end of said analysis time period of said signal;
- and
- recalculating the mean interval between cardiac activation locations of said signal over said analysis time period following application of the boundary condition criteria;
- determine a position of the electrode relative to the three-dimensional model;
- and
- associate the determined at least one characteristic of the electrogram signal with the determined position of the electrode relative to the three-dimensional model.
Dependencies are inferred from the claim text.