Signal Analysis of Cardiac and Other Patient Medical Signals
First Claim
1. A method of analyzing cardiac electrophysiological signals, the method comprising the activities of:
- acquiring a set of signal data representing a plurality of cardiac electrophysiological signals as a function of time;
identifying individual signals within the set of acquired signal data, an individual signal comprising data values representing a plurality of sample points from a single heartbeat;
selecting one of the identified individual signals or a derived signal representing an average of a subset of the identified individual signals as an analysis signal;
identifying data representing a reference signal, the reference signal comprising data values representing a plurality of sample points;
aligning the sample points of the reference signal with the sample points of the analysis signal;
calculating a single value representative of differences between the sample points of the reference signal and the corresponding sample points of the analysis signal; and
communicating data indicating a calculated value to a destination for viewing by a user.
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Accused Products
Abstract
A system and method provide detecting and monitoring cardiac electrophysiological changes by determining differences between a reference signal representing a heartbeat signal and an analysis signal representing another heartbeat signal. A set of signal data consisting of a number of heartbeat signals is acquired as a function of time. Individual heartbeat signals within the set of acquired signals are identified, an individual signal comprising data values representing a plurality of sample points during a single heartbeat. One of the identified individual signals or a derived signal representing an average of a subset of the identified individual signals is selected as an analysis signal. A reference signal is identified. The sample points of the reference signal are aligned with the sample points of the analysis signal. A single value representative of mutual correspondence between the sample points of the reference signal and the corresponding sample points of the analysis signal is calculated. Data indicating a calculated value is communicated to a destination for viewing by a user
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Citations
18 Claims
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1. A method of analyzing cardiac electrophysiological signals, the method comprising the activities of:
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acquiring a set of signal data representing a plurality of cardiac electrophysiological signals as a function of time; identifying individual signals within the set of acquired signal data, an individual signal comprising data values representing a plurality of sample points from a single heartbeat; selecting one of the identified individual signals or a derived signal representing an average of a subset of the identified individual signals as an analysis signal; identifying data representing a reference signal, the reference signal comprising data values representing a plurality of sample points; aligning the sample points of the reference signal with the sample points of the analysis signal; calculating a single value representative of differences between the sample points of the reference signal and the corresponding sample points of the analysis signal; and communicating data indicating a calculated value to a destination for viewing by a user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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11. A system for analyzing cardiac electrophysiological signals, the system comprising:
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an acquisition processor for acquiring a set of signal data representing a plurality of cardiac electrophysiological signals as a function of time; a signal processor coupled to said acquisition processor for identifying individual signals within the set of acquired signals, each individual signal comprising data values on a plurality of sample points from a single heartbeat; selecting one of said identified individual signals or an average of a subset of said identified individual signals to obtain an analysis signal, identifying data representing a reference signal, the reference signal comprising data values on a plurality of sample points, and aligning the sample points of the reference signal with the sample points of the analysis signal; a calculation processor coupled to said signal processor for calculating a value representative of differences between the sample points of the reference signal and the corresponding sample points of the analysis signal; and an output processor coupled to said calculation processor for outputting said calculated value to a user. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification