Detection of valid signals versus artifacts in a multichannel mapping system
First Claim
1. A system for use in monitoring cardiac signals comprising:
- an electrode apparatus comprising a plurality of electrodes configured to be located proximate tissue of a patient;
display apparatus comprising a graphical user interface, wherein the graphical user interface is configured to present information to a user;
computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong by;
i) calculating a first derivative of the signal;
ii) determining a minimum and maximum of the first derivative;
iii) determining whether signs of the minimum and maximum of the first derivative are different; and
in response to determining whether the signs of the minimum and maximum of the first derivative are different, displaying on the graphical user interface whether the signal is valid.
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Accused Products
Abstract
A system and associated method is disclosed for determining whether signal is valid. The system comprises an electrode apparatus comprising a plurality of electrodes configured to be located proximate tissue of a patient. A display apparatus comprising a graphical user interface, wherein the graphical user interface is configured to present information to a user. A computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong by i) calculating a first derivative of the signal; ii) determining a minimum and maximum derivative from the first derivative; iii) determining whether signs of the minimum and maximum derivative are different; and in response to determining whether the signs of the minimum and maximum derivative are different, displaying on a display apparatus whether the signal is valid.
138 Citations
25 Claims
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1. A system for use in monitoring cardiac signals comprising:
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an electrode apparatus comprising a plurality of electrodes configured to be located proximate tissue of a patient; display apparatus comprising a graphical user interface, wherein the graphical user interface is configured to present information to a user; computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong by; i) calculating a first derivative of the signal; ii) determining a minimum and maximum of the first derivative; iii) determining whether signs of the minimum and maximum of the first derivative are different; and in response to determining whether the signs of the minimum and maximum of the first derivative are different, displaying on the graphical user interface whether the signal is valid. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining whether a signal is valid or an artifact in a multichannel mapping system, the multichannel mapping system comprising a processor connected to an electrode apparatus and a display apparatus, the electrode apparatus located proximate tissue of a patient, wherein the processor is configured to determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid, the method comprising:
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acquiring a signal from an electrode associated with an electrode apparatus allows the processor, executing a set of instructions, to perform a set of actions comprising; i) calculating a first derivative of the signal; ii) determining a minimum and maximum from the first derivative; iii) determining whether signs of the minimum and maximum are different; and in response to determining whether signs of the minimum and maximum are different, displaying on the display apparatus whether the signal is valid. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system for use in monitoring cardiac signals comprising:
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an electrode apparatus comprising a plurality of electrodes configured to be located proximate tissue of a patient; display apparatus comprising a graphical user interface, wherein the graphical user interface is configured to present information to a user; computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong by; i) calculating a first derivative of the signal; ii) determining a minimum and maximum of the first derivative; iii) determining whether signs of the minimum and maximum of the first derivative are different, and if the signs are different, declaring the signal to be invalid;
otherwise, if the signs are the same, calculating a ratio of an absolute value of a larger first derivative value to an absolute value of a smaller first derivative value;iv) determining whether the ratio is greater than a pre-selected number; and
in response to determining whether the ratio is greater than the pre-selected number, determining whether the signal is valid.
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24. A system for determining whether a signal is valid or an artifact in a mapping system comprising a processor connected to an electrode and a display apparatus, the electrode located proximate tissue of a patient, wherein the processor is configured to determine whether a signal acquired from a channel associated with the electrode is valid, the system comprising:
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means for acquiring a signal from the electrode allows the processor, executing a set of instructions, to perform a set of actions comprising; i) calculating a first derivative of the signal; ii) determining a minimum and maximum from the first derivative; iii) determining whether signs of the minimum and maximum are different; and in response to determining whether signs of the minimum and maximum are different, displaying on the display apparatus whether the signal is valid.
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25. A non-transitory machine readable medium containing executable computer program instructions which when executed by a data processing system cause said system to perform a method of displaying cardiac signals, the method comprising:
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acquiring a signal from an electrode associated with an electrode apparatus allows the processor, executing a set of instructions, to perform a set of actions comprising; i) calculating a first derivative of the signal; ii) determining a minimum and maximum from the first derivative; iii) determining whether signs of the minimum and maximum are different; and in response to determining whether signs of the minimum and maximum are different, displaying on the display apparatus whether the signal is valid.
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Specification