Systems and methods of medical monitoring according to patient state
First Claim
1. A device for detecting a cardiac event, the device including:
- an sensor adapted to sense the cardiac signal from the patient'"'"'s heart,a memory;
a digital processor configured to;
(i) compute a plurality of patient state values and store the plurality of patient state values in the memory, wherein at least two of the plurality of patient state values are different from one another;
(ii) compute a plurality of a heart signal feature values from the cardiac signal, (iii) store each of the plurality of heart signal feature values so that it is associated with a corresponding patient state value;
(iv) apply a test for detecting the cardiac event, wherein the test is based on both the plurality of patient state values and the plurality of heart signal feature values.
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Accused Products
Abstract
A system for the detection of cardiac events occurring in a human patient is provided. At least two electrodes are included in the system for obtaining an electrical signal from a patient'"'"'s heart. An electrical signal processor is electrically coupled to the electrodes for processing the electrical signal. The systems receives data regarding the patient'"'"'s state (e.g. asleep, exercising). Patient state information is stored in a patient state array, thereby enabling the system to track the patient'"'"'s state over time, and to select an appropriate test for detecting a cardiac event based on both past and present data regarding the patient'"'"'s state.
356 Citations
59 Claims
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1. A device for detecting a cardiac event, the device including:
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an sensor adapted to sense the cardiac signal from the patient'"'"'s heart, a memory; a digital processor configured to;
(i) compute a plurality of patient state values and store the plurality of patient state values in the memory, wherein at least two of the plurality of patient state values are different from one another;
(ii) compute a plurality of a heart signal feature values from the cardiac signal, (iii) store each of the plurality of heart signal feature values so that it is associated with a corresponding patient state value;
(iv) apply a test for detecting the cardiac event, wherein the test is based on both the plurality of patient state values and the plurality of heart signal feature values. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for detecting a cardiac event, the device including:
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an sensor adapted to sense the cardiac signal from the patient'"'"'s heart, a memory; a digital processor configured to;
(i) compute a plurality of patient state values and store the plurality of patient state values in the memory;
(ii) compute a plurality of a heart signal feature values from the electrical signal, (iii) store each of the plurality of heart signal feature values so that it is associated with a corresponding patient state value;
(iv) select a response to the occurrence of the cardiac event, wherein the response is based on both the plurality of patient state values and the plurality of heart signal feature values. - View Dependent Claims (9, 10, 11)
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12. A device for detecting a cardiac event, the device including:
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a sensor adapted to sense the cardiac signal from the patient'"'"'s heart, a memory; a digital processor configured to;
(i) compute a plurality of patient state values from data other than cardiac electrical data and store the plurality of patient state values in the memory;
(ii) compute a plurality of a heart signal feature values from the electrical signal, (iii) store each of the plurality of heart signal feature values so that it is associated with a corresponding patient state value;(iv) apply a test for detecting the cardiac event, wherein the test is based on both the plurality of patient state values and the plurality of heart signal feature values. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A device for detecting a cardiac event, the device including:
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a sensor adapted to sense the a cardiac signal from the patient'"'"'s heart, a memory for storing information regarding the patient'"'"'s state; a digital processor configured to compute the value of a heart signal feature from the cardiac signal, wherein the heart signal feature corresponds to at least one heart beat, the digital processor further configured to select and apply a threshold function test for detecting the cardiac event, wherein the threshold function is based on the value of the heart signal feature and the stored information regarding the patient'"'"'s state, and wherein the threshold function changes over time and in relation to prior patient activity levels. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A device for detecting a cardiac event, the device including:
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a sensor adapted to sense a signal from the patient'"'"'s heart, a memory for storing information regarding the patient'"'"'s state over time in a patient state array; a digital processor configured to compute the value of a heart signal feature from the sensed signal, wherein the heart signal feature corresponds to at least one heart beat, the digital processor further configured to select and apply a test for detecting the cardiac event, wherein the test is based on a patient state index that is a function of the information in the patient state array, such that the patient state index depends on a history of at least two patient state values. - View Dependent Claims (29, 30)
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31. A device for detecting a cardiac event, the device including:
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a sensor adapted to sense a signal reflective of cardiac activity; a state module configured to derive a patient state value; a memory for storing information regarding the patient'"'"'s state over time in a patient state array of patient state values; a digital processor configured to compute the value of a heart signal feature from the sensed signal, wherein the heart signal feature corresponds to at least one heart beat; the digital processor further configured to select and apply a test for determining a cardiac status value; the digital processor further configured to operate to provide therapy in relation to at least one selected cardiac status value; wherein at least one of the operations of computing a heart signal feature, selecting a test, or providing therapy is adjusted based on a patient state index that is a function of the information in the patient state array, such that the patient state index depends on a history of at least one patient state values. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A device for detecting a cardiac event, the device including:
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a sensor adapted to sense the electrical signal from the patient'"'"'s heart, a memory; a digital processor configured to;
(i) compute a plurality of types of patient state values and store the plurality of types of patient state values in the memory, wherein at least two of the plurality of patient state values are different from one another;
(ii) compute a plurality of a heart signal feature values from the electrical signal, (iii) store each of the plurality of heart signal feature values so that it is associated with a corresponding patient state value;
(iv) apply a test for detecting the cardiac event, wherein the test is based on both the plurality of patient state values and the plurality of heart signal feature values.
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Specification