Methods for processing electrocardiac signals having superimposed complexes
First Claim
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1. A method for tracking ectopic beats through template matching, comprising the steps of:
- (a) capturing a single ECG signal in a signal processing unit;
(b) permitting a user to mark a begin point and an end point of the captured single ECG signal;
(c) defining a reference template as being a waveform segment between the marked begin and end points of the single ECG signal;
(d) acquiring data at the signal processing unit; and
(e) using a correlation coefficient calculation on the acquired data to identify a best fit between the reference template and the acquired data;
wherein an ectopic beat is tracked.
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Abstract
Computer implemented methods and associated systems are disclosed for processing electrical signals recorded from the heart and, more particularly, for objectively deriving sub-components and comparing signals and their sub-components.
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Citations
50 Claims
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1. A method for tracking ectopic beats through template matching, comprising the steps of:
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(a) capturing a single ECG signal in a signal processing unit; (b) permitting a user to mark a begin point and an end point of the captured single ECG signal; (c) defining a reference template as being a waveform segment between the marked begin and end points of the single ECG signal; (d) acquiring data at the signal processing unit; and (e) using a correlation coefficient calculation on the acquired data to identify a best fit between the reference template and the acquired data; wherein an ectopic beat is tracked. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11)
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9. A method for tracking ectopic beats through template matching, comprising the steps of:
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(a) capturing a first ECG signal in a signal processing unit; (b) permitting a user to mark a begin point and an end point of the captured first ECG signal; (c) defining a reference template as being a waveform segment between the marked begin and end points of the first ECG signal; (d) acquiring data at the signal processing unit; and (e) using a correlation coefficient calculation on the acquired data to identify a best fit between the reference template and the acquired data; and (f) outputting a quantitative indicator of the correlation coefficient calculation; wherein an ectopic beat is tracked.
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12. A method for deriving a p-wave signal from a premature atrial contraction (“
- PAC”
) beat to assist a person in diagnosing a heart, comprising the steps of;(a) selecting a QRS-T segment of a reference single ECG signal; (b) permitting a user to mark a begin point and an end point of the selected segment of the reference single ECG signal; (c) defining a reference template as being a waveform segment between the marked begin and end points of the selected segment of the reference single ECG signal; (d) acquiring the PAC beat at the signal processing unit from multiple leads; and (e) processing the PAC beat so as to derive the p-wave signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- PAC”
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34. A method for deriving a non-synchronous subcomponent from a first heartbeat signal having a composite waveform which includes a synchronous subcomponent overlapping the non-synchronous subcomponent in order to assist a person in diagnosing a heart, comprising the steps of:
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(a) selecting a synchronous subcomponent of a second, single heartbeat signal which corresponds to the synchronous subcomponent of the first heartbeat signal; (b) permitting a user to mark a begin point and an end point of the selected synchronous subcomponent of the second, single heartbeat signal; (c) defining a reference template as being a waveform segment between the marked begin and end points of the selected synchronous subcomponent of the second, single heartbeat signal; (d) acquiring the composite waveform of the first heartbeat signal at the signal processing unit from multiple leads; and (e) processing the composite waveform beat so as to derive the non-synchronous subcomponent of the first heartbeat signal. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A method for deriving a non-synchronous subcomponent from a first heartbeat signal having a composite waveform which includes a synchronous subcomponent overlapping the non-synchronous subcomponent in order to assist a person in diagnosing a heart, comprising the steps of:
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(a) selecting a synchronous subcomponent of a second heartbeat signal which corresponds to the synchronous subcomponent of the first heartbeat signal; (b) permitting a user to mark a begin point and an end point of the selected synchronous subcomponent of the second, single heartbeat signal; (c) defining a reference template as being a waveform segment between the marked begin and end points of the selected synchronous subcomponent of the second, single heartbeat signal; (d) acquiring the composite waveform of the first heartbeat signal at the signal processing unit from multiple leads; (e) processing the composite waveform beat so as to derive the non-synchronous subcomponent of the first heartbeat signal; (f) comparing the derived non-synchronous subcomponent to a library of non-synchronous subcomponents of known focal origin; and (g) predicting the most likely site of the origin as a function of the comparison.
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50. A method for deriving a non-synchronous subcomponent from a first heartbeat signal having a composite waveform which includes a synchronous subcomponent overlapping the non-synchronous subcomponent in order to assist a person in diagnosing a heart, comprising the steps of:
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(a) selecting a synchronous subcomponent of a second, single heartbeat signal which corresponds to the synchronous subcomponent of the first heartbeat signal; (b) permitting a user to mark a begin point and an end point of the selected synchronous subcomponent of the second, single heartbeat signal; (c) defining a reference template as being a waveform segment between the marked begin and end points of the selected synchronous subcomponent of the second, single heartbeat signal; (d) acquiring the composite waveform of the first heartbeat signal at the signal processing unit from multiple leads; and (e) processing the composite waveform beat so as to derive the non-synchronous subcomponent of the first heartbeat signal wherein the derived non-synchronous subcomponent is a derived, spontaneous non-synchronous subcomponent, the method including the additional steps of maneuvering a pace mapping catheter within or adjacent the atria while pacing the heart, and repeating the acquiring and processing steps so as to derive a paced non-synchronous subcomponent until such time that the derived paced and spontaneous subcomponents correlate with one another within a prescribed criterion.
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Specification