Distributed cardiac activity monitoring with selective filtering
DC CAFCFirst Claim
1. A machine-implemented method comprising:
- identifying heart beats in a sensed cardiac signal;
activating a T wave filter frequency domain, used in said identifying heart beats, in response to a message from a monitoring station generated at least in part based upon discovery of a predetermined characteristic in the sensed cardiac signal; and
outputting information corresponding to the identified heart beats to a communications channel of a distributed cardiac activity monitoring system.
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Abstract
System and techniques for distributed monitoring of cardiac activity include selective T wave filtering. In general, in one implementation, a distributed cardiac activity monitoring system includes a monitoring apparatus, with a selectively activated T wave filter, and a monitoring station. The monitoring apparatus can include a communications interface, a real-time QRS detector, a T wave filter, and a selector that activates the T wave filter to preprocess a cardiac signal provided to the real-time QRS detector in response to a message. The monitoring station can communicatively couple with the monitoring apparatus, over a communications channel, via the communications interface and can transmit the message to the monitoring apparatus to activate the T wave filter based at least in part upon a predetermined criteria (e.g., abnormal T waves for an individual, as identified by a system operator).
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Citations
34 Claims
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1. A machine-implemented method comprising:
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identifying heart beats in a sensed cardiac signal; activating a T wave filter frequency domain, used in said identifying heart beats, in response to a message from a monitoring station generated at least in part based upon discovery of a predetermined characteristic in the sensed cardiac signal; and outputting information corresponding to the identified heart beats to a communications channel of a distributed cardiac activity monitoring system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A distributed cardiac activity monitoring system comprising:
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a monitoring apparatus including a communications interface, a real-time QRS detector, a T wave filter frequency domain, and a selector that activates the T wave filter with respect to the real-time QRS detector in response to a message, wherein the activated T wave filter frequency domain preprocesses a cardiac signal provided to the real-time QRS detector; and a monitoring station that communicatively couples with the monitoring apparatus via the communications interface and transmits the message to the monitoring apparatus to activate the T wave filter frequency domain based at least in part upon a predetermined criteria. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A cardiac monitoring apparatus comprising:
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a communications interface; a real-time heart beat detector; a T wave filter frequency domain; and a selector that activates the T wave filter frequency domain with respect to the real-time heart beat detector in response to a message, wherein the activated T wave filter frequency domain preprocesses a cardiac signal provided to the real-time heart beat detector. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A method comprising:
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receiving at least a portion of a sensed cardiac signal from a monitoring apparatus in contact with a living being under active cardiac monitoring; identify an abnormal T wave in the received cardiac signal; and sending a message to the monitoring apparatus over a communications channel, the message causing the monitoring apparatus to activate a T wave filter frequency domain used in identifying heart beats of the living being under active cardiac monitoring. - View Dependent Claims (29, 30, 31)
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32. A system comprising:
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means for identifying heart beats in a sensed cardiac signal; means for filtering the sensed cardiac signal to reduce T waves in the sensed cardiac signal; and means for selectively activating the means for filtering in response to discovery of a predetermined characteristic in the sensed cardiac signal. - View Dependent Claims (33, 34)
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Specification