Determining onset of cardiac depolarization and repolarization waves for signal processing
First Claim
1. A system for use in monitoring cardiac signals comprising:
- a memory;
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 for use in assisting a user in determining accurate onset data for depolarization of a heart;
computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to;
a) determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong;
b) eliminate one or more channels that acquire invalid signals;
c) determine whether one or more remaining channels acquire sufficiently strong signals to allow onset data to be calculated;
d) in response to determining one or more remaining channels acquire sufficiently strong signals;
(1) determine beat information including first local maximum for each beat;
(2) store the first local maximum for each beat into said memory;
(3) determine whether a square of a first derivative of a signal is smaller than a preselected percentage of the first local maximum for the beat; and
e) in response to determining whether a square of a first derivative is smaller than the preselected percentage of the first local maximum, update the onset data for the beat.
1 Assignment
0 Petitions
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.
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Citations
23 Claims
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1. A system for use in monitoring cardiac signals comprising:
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a memory; 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 for use in assisting a user in determining accurate onset data for depolarization of a heart; computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to; a) determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong; b) eliminate one or more channels that acquire invalid signals; c) determine whether one or more remaining channels acquire sufficiently strong signals to allow onset data to be calculated; d) in response to determining one or more remaining channels acquire sufficiently strong signals; (1) determine beat information including first local maximum for each beat; (2) store the first local maximum for each beat into said memory; (3) determine whether a square of a first derivative of a signal is smaller than a preselected percentage of the first local maximum for the beat; and e) in response to determining whether a square of a first derivative is smaller than the preselected percentage of the first local maximum, update the onset data for the beat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for use in cardiac therapy 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 for use in assisting a user in determining accurate onset data for depolarization of a heart; computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to; a) determine whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is acceptable, b) in response to determining the signal acquired from a channel associated with an electrode from the plurality of electrodes is acceptable; (i) determine beat information including first local maximum for each beat; (2) store the first local maximum for each beat into memory; (3) determine whether a square of a first derivative of a signal is smaller than a preselected percentage of the first local maximum for the beat; and c) in response to determining whether a square of a first derivative is smaller than the preselected percentage of the first local maximum, update the onset data for the beat. - View Dependent Claims (18, 19, 20)
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21. A method for use in monitoring cardiac signals comprising:
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determining whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong; eliminating one or more channels that acquire invalid signals; determining whether one or more remaining channels acquire sufficiently strong signals to allow onset data to be calculated; in response to determining one or more remaining channels acquire sufficiently strong signals; (1) determining beat information including first local maximum for each beat; (2) storing the first local maximum for each beat into memory; (3) determining whether a square of a first derivative of a signal is smaller than a preselected percentage of the first local maximum for the beat; in response to determining whether a square of a first derivative is smaller than the preselected percentage of the first local maximum, updating the onset data for the beat; and displaying on a graphical user interface the updated onset data for depolarization of a heart.
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22. A machine readable medium containing executable computer program instructions which when executed by a data processing system causes said system to perform a method of monitoring cardiac signals, the method comprising:
determining whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong; eliminating one or more channels that acquire invalid signals; determining whether one or more remaining channels acquire sufficiently strong signals to allow onset data to be calculated; in response to determining one or more remaining channels acquire sufficiently strong signals; (1) determining beat information including first local maximum for each beat; (2) storing the first local maximum for each beat into memory; (3) determining whether a square of a first derivative of a signal is smaller than a preselected percentage of the first local maximum for the beat; in response to determining whether a square of a first derivative is smaller than the preselected percentage of the first local maximum, updating the onset data for the beat; and displaying on a graphical user interface the updated onset data for depolarization of a heart.
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23. A system for use in monitoring cardiac signals comprising:
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memory means for storing information; means for determining whether a signal acquired from a channel associated with an electrode from the plurality of electrodes is valid and sufficiently strong; means for eliminating one or more channels that acquire invalid signals; means for determining whether one or more remaining channels acquire sufficiently strong signals to allow onset data to be calculated; means responsive to determining one or more remaining channels acquire sufficiently strong signals, for; (1) determining beat information including first local maximum for each beat; (2) storing the first local maximum for each beat into memory; and (3) for determining whether a square of a first derivative of a signal is smaller than a preselected percentage of the first local maximum for the beat; means responsive to determining whether a square of a first derivative is smaller than the preselected percentage of the first local maximum, for updating the onset data for the beat; and means for displaying a graphical user interface the updated onset data for depolarization of a heart.
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Specification