HEMODYNAMIC RISK SEVERITY BASED UPON DETECTION AND QUANTIFICATION OF CARDIAC DYSRHYTHMIA BEHAVIOR USING A PULSE VOLUME WAVEFORM
First Claim
1. A method for identifying a cardiac dysrhythmia behavior, the method comprising:
- receiving, by a computing device, a biological signal emulating an arterial pulse wave from a sensor in data communication with a human body;
identifying, by the computing device, a plurality of signal peaks within the biological signal;
identifying, by the computing device, a peak amplitude for each of the plurality of signal peaks;
identifying, by the computing device, a time occurrence for each of the plurality of signal peaks;
calculating, by the computing device, a plurality of amplitude differences, wherein each amplitude difference of the plurality of amplitude differences is calculated from a first peak amplitude of a first peak and a second peak amplitude of a second peak;
calculating, by the computing device, a plurality of time differences, wherein each time difference of the plurality of time differences is calculated from a first time occurrence of the first peak and a second time occurrence of the second peak;
calculating, by the computing device, at least one time difference dispersion metric from the plurality of time differences; and
identifying, by the computing device, a cardiac dysrhythmia behavior of the biological signal from the at least one time difference dispersion metric in response to at least one anomalous amplitude difference calculated from a first anomalous peak and a second anomalous peak exceeds an amplitude threshold and at least one anomalous time difference calculated from the first anomalous peak and the second anomalous peak exceeds a time threshold.
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Abstract
A method for identifying cardiac dysrhythmia behavior may include acquiring pulse volume wave data from a sensor associated with a patient, and calculating metrics associated with peaks detected therein. The metrics may include differences in amplitudes of successive pulse volume peaks and differences in the times of occurrence of successive pulse volume peaks. A dispersion analysis of the time differences, obtained during a defined time window, may result in one or more time difference dispersion metrics. Amplitude differences may be compared to an amplitude baseline, and time differences may be compared to a time baseline. Cardiac dysrhythmia behavior may be identified by a combination of an amplitude difference outside of the amplitude baseline, a corresponding time difference outside of the time baseline, and the values of one or more time difference dispersion metrics.
12 Citations
33 Claims
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1. A method for identifying a cardiac dysrhythmia behavior, the method comprising:
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receiving, by a computing device, a biological signal emulating an arterial pulse wave from a sensor in data communication with a human body; identifying, by the computing device, a plurality of signal peaks within the biological signal; identifying, by the computing device, a peak amplitude for each of the plurality of signal peaks; identifying, by the computing device, a time occurrence for each of the plurality of signal peaks; calculating, by the computing device, a plurality of amplitude differences, wherein each amplitude difference of the plurality of amplitude differences is calculated from a first peak amplitude of a first peak and a second peak amplitude of a second peak; calculating, by the computing device, a plurality of time differences, wherein each time difference of the plurality of time differences is calculated from a first time occurrence of the first peak and a second time occurrence of the second peak; calculating, by the computing device, at least one time difference dispersion metric from the plurality of time differences; and identifying, by the computing device, a cardiac dysrhythmia behavior of the biological signal from the at least one time difference dispersion metric in response to at least one anomalous amplitude difference calculated from a first anomalous peak and a second anomalous peak exceeds an amplitude threshold and at least one anomalous time difference calculated from the first anomalous peak and the second anomalous peak exceeds a time threshold. - 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, 27, 28, 29, 30, 31, 32, 33)
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Specification