Detecting sleep disorders using heart activity
First Claim
1. An apparatus comprising one or more machine-readable data storage media storing instructions operable to cause one or more data processing machines to perform operations, the operations comprising:
- receiving machine-readable heart rate information characterizing a heart rate of a monitored individual over a detection window;
determining a quantity of bradycardia events present in at least a portion of the received heart rate information, wherein the determining comprises;
deciding that a bradycardia event has occurred when at least one of the following is true;
(i) the heart rate of the monitored individual is below a predetermined threshold and (ii) the heart rate of the monitored individual is below a baseline heart rate derived from at least a portion of the received heart rate information;
detecting a cyclic variation in the received heart rate information;
determining that obstructive sleep apnea is indicated over the detection window based on a combined analysis of the quantity of bradycardia events present in the received heart rate information and the detected cyclic variation in the received heart rate information; and
selectively and individually reporting the obstructive sleep apnea event in real time in response to the determination that sleep apnea is indicated wherein the reported obstructive sleep apnea event is shorter than the detection window and overlaps at least in part with the detection window.
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Accused Products
Abstract
Systems, methods, apparatus, and computer program products for detecting the existence of a sleep disorder in an individual using heart activity. In one aspect, machine-implemented methods include the actions of analyzing a machine-readable heart rate series of a monitored individual in the time domain using one or more digital data processing devices, detecting a cyclic variation in heart rate in the heart rate series as a result of the analysis in the time domain, and outputting, over an output, a report characterizing a sleep disorder event based on the detection of the cyclic variation in heart rate in the heart rate series. The cyclic variation in heart rate is indicative of a sleep disorder.
69 Citations
34 Claims
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1. An apparatus comprising one or more machine-readable data storage media storing instructions operable to cause one or more data processing machines to perform operations, the operations comprising:
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receiving machine-readable heart rate information characterizing a heart rate of a monitored individual over a detection window; determining a quantity of bradycardia events present in at least a portion of the received heart rate information, wherein the determining comprises; deciding that a bradycardia event has occurred when at least one of the following is true;
(i) the heart rate of the monitored individual is below a predetermined threshold and (ii) the heart rate of the monitored individual is below a baseline heart rate derived from at least a portion of the received heart rate information;detecting a cyclic variation in the received heart rate information; determining that obstructive sleep apnea is indicated over the detection window based on a combined analysis of the quantity of bradycardia events present in the received heart rate information and the detected cyclic variation in the received heart rate information; and selectively and individually reporting the obstructive sleep apnea event in real time in response to the determination that sleep apnea is indicated wherein the reported obstructive sleep apnea event is shorter than the detection window and overlaps at least in part with the detection window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A machine-implemented method comprising:
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analyzing a heart rate series of a monitored individual in the time domain using one or more digital data processing devices, the time domain analysis establishing whether one or more indices of cyclic variation in heart rate are present in the heart rate series; establishing whether one or more indices of tachycardia are present in the heart rate series; establishing whether one or more indices of bradycardia are present in the heart rate series; individually scoring the tachycardia indices, the bradycardia indices, and the cyclic variation in heart rate indices; collectively scoring the tachycardia indices, the bradycardia indices, and the cyclic variation in heart rate indices; determining whether a sleep disorder is indicated based on at least one of the individual scoring and the collective scoring; and outputting, over an output, a report characterizing a sleep disorder event based on the determination of whether the sleep disorder is indicated. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A system comprising:
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an electrocardiograph configured to generate an electrocardiogram of a monitored individual; a data processing device programmed to detect an obstructive sleep apnea disorder event of the monitored individual based exclusively on the electrocardiogram; one or more machine-readable data storage media storing instructions operable to cause the data processing device to perform operations to detect the obstructive sleep apnea disorder event of the monitored individual, the operations comprising receiving, in the electrocardiogram, machine-readable heart rate information characterizing a heart rate of the monitored individual over a detection window, determining a quantity of bradycardia events present in at least a portion of the received heart rate information, wherein the determining comprises; deciding that a bradycardia event has occurred when at least one of the following is true;
(i) the heart rate of the monitored individual is below a predetermined threshold and (ii) the heart rate of the monitored individual is below a baseline heart rate derived from at least a portion of the received heart rate information;detecting a cyclic variation in the received heart rate information; determining that obstructive sleep apnea is indicated over the detection window based on a combined analysis of the number of bradycardia events present in the received heart rate information and the detected cyclic variation in the received heart rate information; and selectively and individually reporting in real time the obstructive sleep apnea disorder event in response to the determination that sleep apnea is indicated, wherein the reported obstructive sleep apnea event is shorter than the detection window and overlaps at least in part with the detection window; and a transmitter configured to report information characterizing the physiological condition of the monitored individual during the detected obstructive sleep apnea disorder event. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification