Method and apparatus for ventricular fibrillation detection
First Claim
1. A method for assessing the chaotic nature of a waveform representation of heart function, said method comprising the steps of:
- calculating an indicator of triangular-like components within said waveform representation;
calculating an indicator of an area encompassed by said waveform representation;
calculating a ratio of said calculated indicator of an area and said calculated indicator of triangular-like components; and
assessing the chaotic nature of said waveform representation of heart function by utilizing said ratio of said calculated indicator of an area and said calculated indicator of triangular-like components.
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Accused Products
Abstract
Provided are a method and apparatus for assessing the chaotic nature of a waveform representation of heart function. The method and apparatus accomplish their objects via the following. An indicator of triangular-like components within a waveform representation of heart function is calculated. An indicator of an area encompassed by the waveform representation indicative of heart function is calculated. A ratio is calculated utilizing the calculated indicator of an area and calculated indicator of triangular-like components to assess the chaotic nature of the waveform representation of heart function. Additionally, a ventricular fibrillation index is calculated. The calculated ventricular fibrillation index is utilized, in two dimensional space, with the ratio that is calculated utilizing the calculated indicator of an area and the calculated indicator of triangular-like components to assess the likelihood of ventricular fibrillation based upon waveform representation of heart function. Further additionally, a minimum ventricular fibrillation index is calculated. The calculated minimum ventricular fibrillation index is utilized, in two dimensional space, with the ratio that is calculated utilizing the calculated indicator of an area and the calculated indicator of triangular-like components to assess the likelihood of ventricular fibrillation based upon waveform representation of heart function. The minimum calculated ventricular fibrillation is also utilized in one dimensional space to assess the likelihood of ventricular fibrillation based upon waveform representation of heart function.
15 Citations
30 Claims
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1. A method for assessing the chaotic nature of a waveform representation of heart function, said method comprising the steps of:
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calculating an indicator of triangular-like components within said waveform representation; calculating an indicator of an area encompassed by said waveform representation; calculating a ratio of said calculated indicator of an area and said calculated indicator of triangular-like components; and assessing the chaotic nature of said waveform representation of heart function by utilizing said ratio of said calculated indicator of an area and said calculated indicator of triangular-like components. - View Dependent Claims (2, 3, 4)
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5. A method for assessing the likelihood of ventricular fibrillation on the basis of a waveform representation of heart function, said method comprising the steps of:
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calculating an indicator of triangular-like components within a waveform representation; calculating an indicator of an area encompassed by said waveform representation; calculating a ratio of said calculated indicator of an area and said calculated indicator of triangular-like components; calculating a ventricular fibrillation index; and assessing the chaotic nature of said waveform representation of heart function by utilizing in at least a two-dimensional decision space said calculated ventricular fibrillation index with said ratio of said calculated indicator of an area and said calculated indicator of triangular-like components. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method for assessing the likelihood of ventricular fibrillation on the basis of a waveform representation of heart function, said method comprising the steps of:
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calculating a minimum ventricular fibrillation index; and assessing the likelihood of ventricular fibrillation based upon a waveform representation of heart function by utilizing in at least a one-dimensional decision space said calculated minimum ventricular fibrillation index. - View Dependent Claims (13, 14, 15)
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16. An apparatus for assessing the chaotic nature of a waveform representation of heart function, said apparatus comprising:
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means for calculating an indicator of triangular-like components within said waveform representation; means for calculating an indicator of an area encompassed by said waveform representation; means for calculating a ratio of said calculated indicator of an area and said calculated indicator of triangular-like components; and means for assessing the chaotic nature of said waveform representation of heart function by utilizing said ratio of said calculated indicator of an area and said calculated indicator of triangular-like components. - View Dependent Claims (17, 18, 19)
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20. An apparatus for assessing the likelihood of ventricular fibrillation on the basis of a waveform representation of heart function, said apparatus comprising:
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means for calculating an indicator of triangular-like components within a waveform representation; means for calculating an indicator of an area encompassed by said waveform representation; means for calculating a ratio of said calculated indicator of an area and said calculated indicator of triangular-like components; means for calculating a ventricular fibrillation index; and means for assessing the likelihood of ventricular fibrillation based upon said waveform representation of heart function by utilizing in at least a two-dimensional decision space said calculated ventricular fibrillation index with a ratio of said calculated indicator of an area and said calculated indicator of triangular-like components. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. An apparatus for assessing the likelihood of ventricular fibrillation on the basis of a waveform representation of heart function, said apparatus comprising:
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means for calculating a minimum ventricular fibrillation index; and means for assessing the likelihood of ventricular fibrillation based upon a waveform representation of heart function by utilizing in at least a one-dimensional decision space said calculated minimum ventricular fibrillation index. - View Dependent Claims (28, 29, 30)
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Specification