Cardiac rhythm management systems and methods predicting congestive heart failure status
First Claim
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1. A cardiac rhythm management system comprising:
- an implantable cardiac rhythm management device comprising;
at least one congestive heart failure (CHF) physiologic parameter input device to provide CHF physiologic information about a subject, the CHF physiologic information comprising information about at least one of the subject'"'"'s dyspnea, orthopnea, neck vein distension, abdominojugular reflex, cough, hepatomegaly, peripheral edema, brain patriaretic peptide (BNP) level, or at least one of pulmonary edema, cardiomegaly, or pleural effusion wherein the input device comprises an implantable transthoracic impedance sensor configured to provide information about the subject'"'"'s pulmonary edema, cardiomegaly, or pleural effusion; and
a processor circuit, comprising at least one processor input coupled to the at least one CHF physiologic parameter input device to receive a plurality of different CHF physiologic parameters, the processor comprising;
weighting factors, stored in a memory, the weighting factors corresponding to each of the received CHF physiologic parameters; and
a CHF status change probability indicator, to predict a likelihood of a subsequent change in a CHF status of a subject using the plurality of different received CHF physiologic parameters and corresponding weighting factors; and
an external remote user interface communicatively couplable to the implantable cardiac rhythm management device, the external remote user interface comprising a user-detectable indication of the CHF status change probability indicator received from the implantable cardiac rhythm management device, in which the remote user interface comprises a user input device to receive at least one CHF physiologic parameter from a user and to communicate to the at least one CHF physiological parameter input device in the implantable cardiac rhythm management device the at least one CHF physiological parameter selected from the group consisting of at least one or more of the subject'"'"'s dyspnea, orthopnea, neck vein distension, abdominojugular reflex, cough, hepatomegaly, peripheral edema, brain natriaretic peptide (BNP) level, pulmonary edema, cardiomegaly, or pleural effusion.
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Abstract
This document describes, among other things, systems, devices, and methods for predicting how the status of the patient'"'"'s congestive heart failure (CHF) condition will progress in the future. In one example, a therapy is provided or adjusted at least in part in response to the prediction.
401 Citations
55 Claims
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1. A cardiac rhythm management system comprising:
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an implantable cardiac rhythm management device comprising; at least one congestive heart failure (CHF) physiologic parameter input device to provide CHF physiologic information about a subject, the CHF physiologic information comprising information about at least one of the subject'"'"'s dyspnea, orthopnea, neck vein distension, abdominojugular reflex, cough, hepatomegaly, peripheral edema, brain patriaretic peptide (BNP) level, or at least one of pulmonary edema, cardiomegaly, or pleural effusion wherein the input device comprises an implantable transthoracic impedance sensor configured to provide information about the subject'"'"'s pulmonary edema, cardiomegaly, or pleural effusion; and a processor circuit, comprising at least one processor input coupled to the at least one CHF physiologic parameter input device to receive a plurality of different CHF physiologic parameters, the processor comprising; weighting factors, stored in a memory, the weighting factors corresponding to each of the received CHF physiologic parameters; and a CHF status change probability indicator, to predict a likelihood of a subsequent change in a CHF status of a subject using the plurality of different received CHF physiologic parameters and corresponding weighting factors; and an external remote user interface communicatively couplable to the implantable cardiac rhythm management device, the external remote user interface comprising a user-detectable indication of the CHF status change probability indicator received from the implantable cardiac rhythm management device, in which the remote user interface comprises a user input device to receive at least one CHF physiologic parameter from a user and to communicate to the at least one CHF physiological parameter input device in the implantable cardiac rhythm management device the at least one CHF physiological parameter selected from the group consisting of at least one or more of the subject'"'"'s dyspnea, orthopnea, neck vein distension, abdominojugular reflex, cough, hepatomegaly, peripheral edema, brain natriaretic peptide (BNP) level, pulmonary edema, cardiomegaly, or pleural effusion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A cardiac rhythm management system comprising:
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an implantable cardiac rhythm management device comprising; means for providing at least one congestive heart failure (CHF) physiologic parameter about a subject, the CHF physiologic information comprising information about at least one of the subject'"'"'s dyspnea, orthopnea, neck vein distension, abdominojugular reflex, cough, hepatomegaly, peripheral edema, brain natriaretic peptide (BNP) level, pulmonary edema, cardiomegaly, or pleural effusion; and a processor circuit, comprising at least one processor input coupled to the at least one CHF physiologic parameter input device to receive a plurality of different CHF physiologic parameters, the processor comprising; weighting factors, stored in a memory, the weighting factors corresponding to each of the received CHF physiologic parameters; and a CHF status change probability indicator, to predict a likelihood of a subsequent change in a CHF status of a subject using a probability computed using the plurality of different received CHF physiologic parameters and corresponding weighting factors; and an external remote user interface communicatively couplable to the implantable cardiac rhythm management device, the external remote user interface comprising a user-detectable indication of the CHF status change probability indicator received from the implantable cardiac rhythm management device, in which the remote user interface comprises a user input device to receive at least one CHF physiologic parameter from a user and to communicate to the at least one CHF physiological parameter input device in the implantable cardiac rhythm management device the at least one CHF physiological parameter selected from the group consisting of at least one or more of the subject'"'"'s dyspnea, orthopnea, neck vein distension, abdominojugular reflex, cough, hepatomegaly, peripheral edema, brain natriaretic peptide (BNP) level, pulmonary edema, cardiomegaly, or pleural effusion.
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28. A cardiac rhythm management system comprising:
an implantable cardiac rhythm management device comprising; at least one congestive heart failure (CHF) conditioning event input device to provide a CHF conditioning event statistically associated with the occurrence of a CHF status change in a subject; a processor circuit, comprising at least one processor input coupled to the at least one CHF conditioning event input device to receive the CHF conditioning event, the processor comprising an indicator predicting the occurrence of a CHF status change within a specified prediction time period if an estimated CHF status change probability exceeds a specified threshold value, wherein the estimated CHF status change probability is computed from a conditional CHF status change probability, associated with the conditioning event, that is derived from past observations of instances in which the conditioning event occurs alone or together with a CHF status change within a specified time period; and wherein the processor is adapted to estimate a rate C at which the conditioning event occurs, and further wherein the estimated CHF status change probability is calculated by the expression;
estimated CHF status change probability=CP×
(1−
e−
CT).- View Dependent Claims (29, 30)
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31. A method comprising:
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obtaining a plurality of different congestive heart failure (CHF) physiologic parameters about a subject for predicting a CHF status change, in which the obtaining the plurality of different CHF physiologic parameters about the subject comprises at least one of; receiving a user input information about at least one of the subject'"'"'s dyspnea, orthopnea, neck vein distention, abdominojugular reflex, cough, hepatomegaly, peripheral edema, and brain natiaretic peptide (BNP) level; and
sensing a thoracic impedance to obtain information about at least one of the subject'"'"'s pulmonary edema, cardiomegaly, and pleural effusion;weighting each of the CHF physiologic parameters to provide corresponding weighted CHF physiologic parameters; computing a CHF status change probability using the weighted CHF physiologic parameters; and using the computed CHF status change probability in predicting whether the subject'"'"'s CHF status will undergo a significant change within a specified subsequent time period. - 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)
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Specification