Evaluating a patient condition using autonomic balance information in implatable cardiac devices
First Claim
1. A method, comprising:
- acquiring a cardiac waveform from a patient using an implantable cardiac device provided in a patient;
detecting one or more characteristics associated with autonomic balance of the patient; and
using the one or more autonomic balance characteristics to evaluate one or more patient conditions, the one or more patient conditions comprising sleep onset.
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Accused Products
Abstract
Systems and methods for evaluating a patient condition using autonomic balance information involve providing an implantable cardiac device that acquires a cardiac waveform from a patient. One or more characteristics associated with autonomic balance of the patient are detected and used to evaluate a patient condition, such as sleep onset, sleep stage, cardiac vulnerability over a predetermined duration, and sleep disordered breathing. Patient activity levels may be sensed and used to evaluate the patient'"'"'s condition, such as for determining a level of systemic stress. Characteristics associated with the autonomic balance include calculating an LF/HF ratio waveform and/or determining one or more morphological features of the LF/HF ratio waveform. Coordination with a patient-external device may facilitate transmission of information about one or more of the cardiac waveform, the one or more characteristics associated with the autonomic balance, and a marked cardiac waveform.
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Citations
19 Claims
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1. A method, comprising:
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acquiring a cardiac waveform from a patient using an implantable cardiac device provided in a patient; detecting one or more characteristics associated with autonomic balance of the patient; and using the one or more autonomic balance characteristics to evaluate one or more patient conditions, the one or more patient conditions comprising sleep onset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cardiac system, comprising:
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a housing configured for implantation in a patient; a plurality of electrodes coupled to the housing and configured for sensing a cardiac waveform; a memory; and a controller provided in the housing and coupled to the memory and the plurality of electrodes, the controller configured to detect one or more characteristics associated with an autonomic balance of the patient, and use the one or more autonomic balance characteristics to detect patient sleep and evaluate a patient condition. - View Dependent Claims (12, 13, 14)
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15. A cardiac system, comprising:
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means for acquiring a cardiac waveform; means for detecting one or more characteristics associated with an autonomic balance of a patient; and means for detecting patient sleep and evaluating a patient condition using the one or more characteristics associated with the autonomic balance. - View Dependent Claims (16, 17, 18, 19)
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Specification