Method and apparatus for ECG-derived sleep disordered breathing monitoring, detection and classification
First Claim
1. A method of detecting physiological events in a subject from a physiological electrocardiogram (ECG) signal, said method characterized by the steps of:
- i) monitoring said ECG signal;
ii) extracting from said ECG signal parameters indicative of said events; and
iii) utilizing said parameters to detect said events so as to distinguish obstructive sleep apnea (OSA) from central sleep apnea (CSA).
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Abstract
An apparatus is disclosed for detecting sleep disordered breathing (SDB), cardiac events and/or heart rate variability (HRV) in a subject from a physiological electrocardiogram (ECG) signal. The apparatus includes means for monitoring the ECG signal and means for extracting from the ECG signal parameters indicative of the SDB, cardiac events and/or HRV. The apparatus also includes means utilizing the parameters to detect the SDB, cardiac events and/or HRV. The SDB, cardiac events and/or HRV may be detected in real time, breath by breath and/or post acquisition of the ECG signal. The apparatus may include means for determining a treatment for the SDB, cardiac events and/or HRV. An electromyogram (EMG) signal may be extracted from the ECG signal to provide a marker for distinguishing OSA from CSA. The marker may indicate that treatment levels should be varied to avoid elevated cardiac risk. A method of detecting SDB, cardiac events and/or HRV in the subject is also disclosed.
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Citations
27 Claims
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1. A method of detecting physiological events in a subject from a physiological electrocardiogram (ECG) signal, said method characterized by the steps of:
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i) monitoring said ECG signal;
ii) extracting from said ECG signal parameters indicative of said events; and
iii) utilizing said parameters to detect said events so as to distinguish obstructive sleep apnea (OSA) from central sleep apnea (CSA). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for detecting physiological events in a subject from a physiological electrocardiogram (ECG) signal, including:
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i) monitoring means for monitoring said ECG signal;
ii) extracting means for extracting from said ECG signal parameters indicative of said events; and
iii) means utilizing said parameters to detect said events including distinguishing means for distinguishing obstructive sleep apnea (OSA) from central sleep apnea (CSA). - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification