Systems and methods for acquiring endocardially or epicardially paced electrocardiograms
First Claim
1. A system for acquiring and analyzing electrograms in myocardial tissue comprisinga member supporting multiple electrodes in a three dimensional, radially expanded array adapted to be in operative association with a region of heart tissue,a first processing element including a pacing module and a signal processing module coupled to the multiple electrodes to acquire a sample of a cardiac event by entrainment pacing the heart at a predetermined location while conditioning the multiple electrodes to sense paced electrograms occurring in the tissue region during entrainment pacing, anda second processing element including means for electronically comparing the sample to a template of a cardiac event of known diagnosis and generating an output based upon the comparison, whereby the output provides a diagnostic indicator based upon entrainment pacing.
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Abstract
Systems and methods acquire electrocardiograms using a first electrode associated with a region of heart tissue and a second body surface electrode. An analog or digital processing element is coupled to the first and second electrodes for conditioning the first electrode to emit a pacing signal and for conditioning the second electrode to sense paced electrocardiograms occurring as a result of the pacing signal. The systems and methods also employ a template of an electrocardiogram of a cardiac event of known diagnosis; for example an arrhythmia that the physician seeks to treat. The systems and methods compare this event-specific template to a sample of a paced electrocardiogram. The comparison yields a matching coefficient indicating how alike the input sample is to the input template. The matching coefficient can be used by the physician, for example, to aid in the location of sites that are potentially appropriate for ablation.
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Citations
21 Claims
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1. A system for acquiring and analyzing electrograms in myocardial tissue comprising
a member supporting multiple electrodes in a three dimensional, radially expanded array adapted to be in operative association with a region of heart tissue, a first processing element including a pacing module and a signal processing module coupled to the multiple electrodes to acquire a sample of a cardiac event by entrainment pacing the heart at a predetermined location while conditioning the multiple electrodes to sense paced electrograms occurring in the tissue region during entrainment pacing, and a second processing element including means for electronically comparing the sample to a template of a cardiac event of known diagnosis and generating an output based upon the comparison, whereby the output provides a diagnostic indicator based upon entrainment pacing.
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2. A system for acquiring and analyzing electrograms in myocardial tissue comprising
a member supporting multiple electrodes in a three dimensional, radially expanded array adapted to be in operative association with a region of heart tissue, a first processing element including a pacing module and a signal processing module coupled to the multiple electrodes to acquire a sample of a cardiac event by conditioning at least one of the multiple electrodes to emit a pacing signal to entrainment pace myocardial tissue and to sense, using the multiple electrodes, paced electrograms occurring in the tissue region as a result of the pacing signal, and a second processing element including means for electronically comparing the sample to a template of a cardiac event of known diagnosis and generating an output based upon the comparison, whereby the output provides a diagnostic indicator based upon entrainment pacing.
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11. A method for acquiring and analyzing electrograms in myocardial tissue comprising the steps of
deploying a three dimensional, radially expanded array of multiple electrodes in operative association with a region of heart tissue, acquiring a sample of a cardiac event by entrainment pacing the heart at a predetermined location using the multiple electrodes, while conditioning the multiple electrodes to sense paced electrograms occurring in the tissue region during entrainment pacing, and electronically comparing the sample to a template of a cardiac event of known diagnosis and generating an output based upon the comparison, whereby the output provides a diagnostic indicator based upon entrainment pacing.
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13. A method for acquiring and analyzing electrograms in myocardial tissue comprising the steps of
deploying a three dimensional, radially expanded array of multiple electrodes in operative association with a region of heart tissue, acquiring a sample of a cardiac event by conditioning at least one of the multiple electrodes to emit a pacing signal to entrainment pace myocardial tissue and to sense, using the multiple electrodes, paced electrograms occurring in the tissue region as a result of the pacing signal, and electronically comparing the sample to a template of a cardiac event of known diagnosis and generating an output based upon the comparison, whereby the output provides a diagnostic indicator based upon entrainment pacing.
Specification