Adaptive sampling of heart sounds
First Claim
Patent Images
1. A system comprising:
- a first implantable medical device comprising;
a control circuit;
a sensor, coupled to the control circuit, the sensor configured to sense energy and produce a signal indicative of heart sounds;
a heart sound detector, coupled to the sensor and the control circuit, the heart sound detector adapted to detect heart sounds within the signal indicative of heart sounds;
a parameter circuit, coupled to the control circuit, the parameter circuit configured to store one or more heart sound signal processing parameters, wherein the device acquires and processes heart sound information as a function of the one or more heart sound signal processing parameters, wherein the heart sound signal processing parameter includes one or more of a sampling frequency, a data acquisition interval, one or more characteristics of an ensemble average, a bit resolution, a noise blanking interval, and a retry interval;
a triggering circuit, coupled to the control circuit, the triggering circuit configured to transmit a triggering circuit signal to the control circuit upon device detection of a physiologic triggering event, andwherein the control circuit is configured to change one or more of the heart sound signal processing parameters in response to receipt of the triggering circuit signal.
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Abstract
A system and method to sense heart sounds with one or more implantable medical devices according to one or more parameters. The system alters one or more of the parameters as a function of one or more triggering events. The system then senses heart sounds with the one or more implantable medical devices according to at least the one or more altered parameters.
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Citations
17 Claims
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1. A system comprising:
a first implantable medical device comprising; a control circuit; a sensor, coupled to the control circuit, the sensor configured to sense energy and produce a signal indicative of heart sounds; a heart sound detector, coupled to the sensor and the control circuit, the heart sound detector adapted to detect heart sounds within the signal indicative of heart sounds; a parameter circuit, coupled to the control circuit, the parameter circuit configured to store one or more heart sound signal processing parameters, wherein the device acquires and processes heart sound information as a function of the one or more heart sound signal processing parameters, wherein the heart sound signal processing parameter includes one or more of a sampling frequency, a data acquisition interval, one or more characteristics of an ensemble average, a bit resolution, a noise blanking interval, and a retry interval; a triggering circuit, coupled to the control circuit, the triggering circuit configured to transmit a triggering circuit signal to the control circuit upon device detection of a physiologic triggering event, and wherein the control circuit is configured to change one or more of the heart sound signal processing parameters in response to receipt of the triggering circuit signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a first implantable medical device comprising; a control circuit; a sensor, coupled to the control circuit, the sensor configured to sense energy and produce a signal indicative of heart sounds; a heart sound detector, coupled to the sensor and the control circuit, the heart sound detector adapted to detect heart sounds within the signal indicative of heart sounds; a parameter circuit, coupled to the control circuit, the parameter circuit configured to store one or more heart sound signal processing parameters, wherein the device acquires and processes heart sound information as a function of the one or more heart sound signal processing parameters; a triggering circuit, coupled to the control circuit, the triggering circuit configured to transmit a triggering circuit signal to the control circuit upon device detection of a physiologic triggering event, and wherein the control circuit is configured to; identify a specified heart sound to sense according to the detected physiologic triggering event; and change a signal sampling frequency based on the identified heart sound. - View Dependent Claims (12, 13)
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14. A system comprising:
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a first implantable medical device comprising; a control circuit; a sensor, coupled to the control circuit, the sensor configured to sense energy and produce a signal indicative of heart sounds; a heart sound detector, coupled to the sensor and the control circuit, the heart sound detector adapted to detect heart sounds within the signal indicative of heart sounds; a parameter circuit, coupled to the control circuit, the parameter circuit configured to store one or more heart sound signal processing parameters, wherein the device acquires and processes heart sound information as a function of the one or more heart sound signal processing parameters; a triggering circuit, coupled to the control circuit, the triggering circuit configured to transmit a triggering circuit signal to the control circuit upon device detection of a physiologic triggering event, and wherein the control circuit is configured to; identify a specified heart sound to sense according to the detected physiologic triggering event; and change a signal sampling bit resolution based on the identified heart sound.
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15. A system comprising:
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a first implantable medical device comprising; a control circuit; a sensor, coupled to the control circuit, the sensor configured to sense energy and produce a signal indicative of heart sounds; a heart sound detector, coupled to the sensor and the control circuit, the heart sound detector adapted to detect heart sounds within the signal indicative of heart sounds; a parameter circuit, coupled to the control circuit, the parameter circuit configured to store one or more heart sound signal processing parameters, wherein the device acquires and processes heart sound information as a function of the one or more heart sound signal processing parameters; a triggering circuit, coupled to the control circuit, the triggering circuit configured to transmit a triggering circuit signal to the control circuit upon device detection of a physiologic triggering event, and wherein the control circuit is configured to; identify a specified heart sound to sense according to the detected physiologic triggering event; and change a noise blanking interval based on the identified heart sound.
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16. A system comprising:
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a first implantable medical device comprising; a control circuit; a sensor, coupled to the control circuit, the sensor configured to sense energy and produce a signal indicative of heart sounds; a heart sound detector, coupled to the sensor and the control circuit, the heart sound detector adapted to detect heart sounds within the signal indicative of heart sounds; a parameter circuit, coupled to the control circuit, the parameter circuit configured to store one or more heart sound signal processing parameters, wherein the device acquires and processes heart sound information as a function of the one or more heart sound signal processing parameters; a triggering circuit, coupled to the control circuit, the triggering circuit configured to transmit a triggering circuit signal to the control circuit upon device detection of a physiologic triggering event, and wherein the control circuit is configured to; identify a specified heart sound to sense according to the detected physiologic triggering event; and change a data acquisition buffer length based on the identified heart sound.
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17. A system comprising:
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a first implantable medical device comprising; a control circuit; a sensor, coupled to the control circuit, the sensor configured to sense energy and produce a signal indicative of heart sounds; a heart sound detector, coupled to the sensor and the control circuit, the heart sound detector adapted to detect heart sounds within the signal indicative of heart sounds; a parameter circuit, coupled to the control circuit, the parameter circuit configured to store one or more heart sound signal processing parameters, wherein the device acquires and processes heart sound information as a function of the one or more heart sound signal processing parameters; a triggering circuit, coupled to the control circuit, the triggering circuit configured to transmit a triggering circuit signal to the control circuit upon device detection of a physiologic triggering event, and wherein the control circuit is configured to; sample heart beats in response to the detected physiologic triggering event; and select heart beats for inclusion in a calculated ensemble average according to the detected physiologic triggering event.
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Specification