Method and apparatus for classifying and localizing heart arrhythmias
First Claim
1. A method of analyzing a signal, comprising:
- providing a digital template and a digitized signal sufficient to facilitate identification of atrial fibrillatory components of activity as originating from a left side or a right side of the heart, the digitized signal comprising a plurality of amplitudes corresponding to consecutive time samples;
generating a plurality of correlation values correlating the digital template to successive time samples of the digitized signal, wherein a plurality of correlation values are generated sufficient to facilitate discernment of whether distinct components of activity have origins in the left or right sides of the heart;
mapping the correlation values; and
identifying a treatable condition, based upon the mapping of the correlation values.
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Abstract
Analyzes surface electrocardiographic and intracardiac signals to identify and separate electrical activity corresponding to distinct but superimposed events in the heart. Assesses the spatial phase, temporal phase, rate, spectrum and reproducibility of each event to determine uniformity of activation in all spatial dimensions. Uses numerical indices derived from these analyses to diagnose arrhythmias. Uses these indices to determine the location of an arrhythmia circuit, and to direct the movement of an electrode catheter to this location for ablation or permanent catheter positioning. Subsequently, uses these indices to determine whether ablation has successfully eliminated the circuit. Uses variability in these indices from the surface electrocardiogram to indicate subtle beat-to-beat fluctuations which reflect the tendency towards atrial and ventricular arrhythmias.
65 Citations
35 Claims
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1. A method of analyzing a signal, comprising:
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providing a digital template and a digitized signal sufficient to facilitate identification of atrial fibrillatory components of activity as originating from a left side or a right side of the heart, the digitized signal comprising a plurality of amplitudes corresponding to consecutive time samples;
generating a plurality of correlation values correlating the digital template to successive time samples of the digitized signal, wherein a plurality of correlation values are generated sufficient to facilitate discernment of whether distinct components of activity have origins in the left or right sides of the heart;
mapping the correlation values; and
identifying a treatable condition, based upon the mapping of the correlation values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification