Triphasic wave defibrillation
First Claim
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1. A method for electrical defibrillation of fibrillating myocardial tissues comprising the steps of:
- (a) defining a defibrillating pulse with a defibrillating polarity, a defibrillating voltage, and a defibrillating pulse width between three and fifteen milliseconds in duration;
(b) defining a conditioning pulse with a polarity opposite to the defibrillating polarity, a conditioning pulse voltage level between 20% and 200% of the defibrillating voltage, and a conditioning pulse width between three and fifty milliseconds in duration;
(c) defining a healing pulse with the opposite polarity as the defibrillating polarity, a healing pulse voltage level between 5% and 40% of the defibrillating voltage, and a healing pulse width between one and one-hundred milliseconds in duration; and
,(d) applying the conditioning pulse, the defibrillating pulse, and the healing pulse in sequence to cells in said fabrillating myocardial tissues.
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Abstract
Method and apparatus for stimulation of cells in arrhythmic myocardial tissues includes depolarizing the cells by application of a first electrical pulse or shock followed by a second electrical pulse having a polarity opposite to the first pulse. Finally, a third pulse having the same polarity as the first pulse is applied to the cells. Specific relationships between the magnitudes and durations of the pulses are advantageously employed for achieving the most desirable stimulation results.
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Citations
16 Claims
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1. A method for electrical defibrillation of fibrillating myocardial tissues comprising the steps of:
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(a) defining a defibrillating pulse with a defibrillating polarity, a defibrillating voltage, and a defibrillating pulse width between three and fifteen milliseconds in duration; (b) defining a conditioning pulse with a polarity opposite to the defibrillating polarity, a conditioning pulse voltage level between 20% and 200% of the defibrillating voltage, and a conditioning pulse width between three and fifty milliseconds in duration; (c) defining a healing pulse with the opposite polarity as the defibrillating polarity, a healing pulse voltage level between 5% and 40% of the defibrillating voltage, and a healing pulse width between one and one-hundred milliseconds in duration; and
,(d) applying the conditioning pulse, the defibrillating pulse, and the healing pulse in sequence to cells in said fabrillating myocardial tissues. - View Dependent Claims (2, 3)
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4. The method of defibrillation of claim wherein said steps of defining defibrillating, conditioning, and healing pulses comprises adjusting said defibrillating pulse width to be between five and ten milliseconds in duration, said conditioning pulse width to be between ten and forty milliseconds in duration, and said healing pulse to be between ten and fifteen milliseconds in duration.
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5. A method for electrically stimulating cells in arrhythmic myocardial tissues, said method comprising the steps of:
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(a) defining a conditioning pulse with a conditioning pulse time period, a conditioning pulse voltage, and a conditioning pulse polarity; (b) defining a correcting pulse with a correcting pulse time period, and a correcting pulse voltage with a polarity opposite to that of said conditioning pulse voltage; (c) defining a healing pulse with a healing pulse time period, and a healing pulse voltage with the same polarity as said conditioning pulse voltage; and (d) applying the conditioning pulse, the correcting pulse, and the healing pulse in sequence to said cells in arrhythmic myocardial tissues. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A defibrillator device comprising:
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means for generating a triphasic electrical wave including a conditioning pulse with a conditioning pulse polarity, a defibrillating pulse with a defibrillating pulse polarity opposite to the conditioning pulse polarity, and a healing pulse with a healing pulse polarity the same as the conditioning pulse polarity; and
,means for selectively applying the triphasic wave to cells in arrhythmic myocardial tissues. - View Dependent Claims (14, 15, 16)
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Specification