Real-time morphology analysis for lesion assessment
First Claim
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1. A system comprising:
- a catheter including;
a flexible catheter body having a distal portion; and
at least one electrode disposed on the distal portion, the at least one electrode configured to measure an electrical signal based on a cardiac activation signal; and
a mapping processor configured to;
acquire the electrical signal from the at least one electrode;
provide an electrogram based on the electrical signal;
determine a sharpness feature associated with the electrogram and, based on the determined sharpness feature, determine a characteristic of a morphology of the electrogram, wherein the characteristic of the morphology of the electrogram is related to the sharpness.
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Abstract
Electrodes are used to measure an electrical signal (e.g., an electrogram). One or more filters are applied to the electrical signal to generate one or more filtered signals. Features of the filtered signals are evaluated to assess a sharpness corresponding to the electrical signal. Based on the sharpness, various characteristics of a morphology of the electrogram may be evaluated over a time period.
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Citations
20 Claims
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1. A system comprising:
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a catheter including; a flexible catheter body having a distal portion; and at least one electrode disposed on the distal portion, the at least one electrode configured to measure an electrical signal based on a cardiac activation signal; and a mapping processor configured to; acquire the electrical signal from the at least one electrode; provide an electrogram based on the electrical signal; determine a sharpness feature associated with the electrogram and, based on the determined sharpness feature, determine a characteristic of a morphology of the electrogram, wherein the characteristic of the morphology of the electrogram is related to the sharpness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for evaluating a condition of myocardial tissue, the method comprising:
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positioning a catheter adjacent to myocardial tissue within a patient'"'"'s body, the catheter comprising; a flexible catheter body having a distal portion; and at least one electrode disposed on the distal portion, the at least one electrode configured to measure an electrical signal based on a cardiac activation signal; receiving the electrical signal; providing an electrogram based on the electrical signal; determining a sharpness feature of the electrogram; determining, based on the determined sharpness feature of the electrogram, a characteristic of a morphology of the electrogram, the characteristic of the morphology of the electrogram relating to the sharpness of the electrogram; and displaying an indication of at least one of the sharpness and the characteristic of the morphology, wherein the indication comprises at least one of a map, a light indicator, and a waveform. - View Dependent Claims (19)
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20. A system comprising:
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an ablation catheter including; a flexible catheter body having a distal portion; a tissue ablation electrode disposed on the distal portion of the flexible catheter body, wherein the tissue ablation electrode is configured to apply ablation energy to tissue; at least one electrode disposed on the distal portion, the at least one electrode configured to measure an electrical signal based on a cardiac activation signal; and a radiofrequency (RF) generator operatively coupled to the tissue ablation electrode and configured to generate the ablation energy to be conveyed to the tissue ablation electrode; and a mapping processor configured to; acquire the electrical signal from the at least one electrode; provide an electrogram based on the electrical signal; determine a sharpness feature associated with the electrogram and, based on the determined sharpness feature, determine a characteristic of a morphology of the electrogram, the characteristic relating to the sharpness.
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Specification