Defibrillation utilizing the dominant frequency of fibrillation
First Claim
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1. A method for defibrillating a heart in fibrillation, comprising the steps of:
- detecting fibrillation of the heart; and
responsive to said detecting, applying to the fibrillating heart a periodic waveform which entrains the heart thereby producing defibrillation, said periodic waveform having a frequency spectrum with a dominant frequency, said dominant frequency being in the range of 2 Hz-20 Hz.
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Abstract
Method and apparatus are provided for cardiac defibrillation using a waveform with a dominant frequency near that of a fibrillating heart. The defibrillator includes electrical generating means for producing a waveform having a dominant frequency within a range of 2 Hz-20 Hz. The waveform provides low level electrical shock to a fibrillating heart, thereby causing defibrillation. The waveform, which can comprise a Rossler-type chaotic waveform or a sinusoidal waveform, preferably has a dominant frequency near the frequency of fibrillation of the fibrillating heart.
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Citations
17 Claims
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1. A method for defibrillating a heart in fibrillation, comprising the steps of:
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detecting fibrillation of the heart; and responsive to said detecting, applying to the fibrillating heart a periodic waveform which entrains the heart thereby producing defibrillation, said periodic waveform having a frequency spectrum with a dominant frequency, said dominant frequency being in the range of 2 Hz-20 Hz. - View Dependent Claims (2, 3, 4)
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5. A method for defibrillating a heart in fibrillation, comprising the steps of:
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detecting fibrillation of the heart; and responsive to said detecting, applying to the fibrillating heart a chaotic waveform having a frequency spectrum with a dominant frequency, said dominant frequency being in a range of 2 Hz-20 Hz. - View Dependent Claims (6)
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7. A method for defibrillating a heart in fibrillation, comprising the steps of:
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detecting fibrillation of the heart; and responsive to said detecting, applying to the fibrillating heart a sinusoidal-shaped waveform having a frequency spectrum with a dominant frequency, said dominant frequency being in the range of 2 Hz-20 Hz. - View Dependent Claims (8)
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9. A method for defibrillating a heart in fibrillation, comprising the steps of:
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detecting fibrillation of the heart; and responsive to said detecting, applying to the fibrillating heart a waveform having a frequency spectrum with a dominant frequency, said dominant frequency being in the range of 2 Hz-20 Hz, and wherein said dominant frequency of said waveform comprises a dominant frequency near a frequency of fibrillation of said fibrillating heart. - View Dependent Claims (10)
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11. A method for defibrillating a heart in fibrillation, comprising the steps of:
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detecting fibrillation of the heart; and responsive to said detecting, applying to the fibrillating heart a waveform having a frequency spectrum with a dominant frequency and a subordinate frequency, said dominant frequency being lower than said subordinate frequency within said waveform.
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12. A defibrillator for defibrillating a fibrillating heart, said defibrillator comprising:
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electrical generating means for producing a periodic waveform having a frequency spectrum with a dominant frequency, said dominant frequency being in the range of 2 Hz-20 Hz; and means for delivering said waveform to electrically entrain the fibrillating heart, thereby causing defibrillation of the heart. - View Dependent Claims (13, 14, 15)
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16. A defibrillator for defibrillating a fibrillating heart, said defibrillator comprising:
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electrical generating means for generating a Rossler-type chaotic waveform having a dominant frequency, said dominant frequency being near a frequency of fibrillation of the fibrillating heart and in the range of 2 Hz-20 Hz; and means for delivering said waveform to provide electrical shock to the fibrillating heart, thereby causing defibrillation of the heart.
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17. A defibrillator for defibrillating a fibrillating heart, said defibrillator comprising:
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electrical generating means for generating a sinusoidal-shaped waveform having a frequency spectrum with a dominant frequency, said dominant frequency being in the range of 2 Hz-20 Hz; and means for delivering said waveform to electrically entrain the fibrillating heart, thereby causing defibrillation of the heart.
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Specification