Apparatus and method of arrhythmia detection in a subcutaneous implantable cardioverter/defibrillator
First Claim
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1. A method for detecting arrhythmias with a non-transvenous implantable cardioverter/defibrillator comprising the steps of:
- sensing cardiac signal information from two far field sensors implanted in a patient;
amplifying the sensed cardiac signal information;
filtering the amplified cardiac signal information;
measuring one or more parameters of the filtered cardiac signal information; and
processing and integrating the one or more parameters of the cardiac signal information.
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Abstract
In a subcutaneous implantable cardioverter/defibrillator, cardiac arrhythmias are detected to determine necessary therapeutic action. Cardiac signal information is sensed from far field electrodes implanted in a patient. The sensed cardiac signal information is then amplified and filtered. Parameters such as rate, QRS pulse width, cardiac QRS slew rate, amplitude and stability measures of these parameters from the filtered cardiac signal information are measured, processed and integrated to determine if the cardioverter/defibrillator needs to initiate therapeutic action.
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Citations
93 Claims
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1. A method for detecting arrhythmias with a non-transvenous implantable cardioverter/defibrillator comprising the steps of:
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sensing cardiac signal information from two far field sensors implanted in a patient;
amplifying the sensed cardiac signal information;
filtering the amplified cardiac signal information;
measuring one or more parameters of the filtered cardiac signal information; and
processing and integrating the one or more parameters of the cardiac signal information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A non-transvenous implantable cardioverter/defibrillator comprising:
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two far field electrodes spaced from each other;
an amplifier coupled to the far field electrodes;
at least one filter coupled to the amplifier;
a timing detector coupled to the at least one filter;
a converter coupled to the at least one filter;
at least one parameter detector coupled to the converter; and
a parameter integrator. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A non-transvenous implantable cardioverter/defibrillator comprising:
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two far field electrodes disposed at a predetermined distance from each other;
sensing means for sensing a cardiac signal through the two far field electrodes;
amplifying means for amplifying the sensed cardiac signal;
filtering means for filtering the amplified cardiac signal;
measuring means for measuring at least one parameter of the cardiac signal; and
integrating means for integrating the at least one parameter of the cardiac signal information. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61)
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62. A method for treating a patient with a nontransvenous implantable cardioverter/defibrillator, comprising the steps of:
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sensing cardiac information of the patient on a continuous basis through two far field electrodes spaced from each other;
performing additional analysis of the cardiac information; and
delivering appropriate therapy to the patient according to the analysis performed. - View Dependent Claims (63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88)
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89. A method for detecting arrhythmias with a non-transvenous implantable cardioverter/defibrillator comprising the steps of:
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sensing cardiac signal information from two subcutaneous electrodes, at least one of the subcutaneous electrodes being positioned in the rib area, said subcutaneous electrodes being spaced from the heart;
amplifying the sensed cardiac signal information;
filtering the amplified cardiac signal information;
measuring one or more parameters of the filtered cardiac signal information; and
processing and integrating the one or more parameters of the cardiac signal information.
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90. A non-transvenous implantable cardioverter/defibrillator comprising:
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two subcutaneous electrodes, at least one the subcutaneous electrodes being disposed in the rib area;
an amplifier coupled to the two electrodes;
at least one filter coupled to the amplifier;
a timing detector coupled to the at least one filter;
a converter coupled to the at least one filter;
at least one parameter detector coupled to the converter; and
a parameter integrator.
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91. A method for detecting arrhythmias with a non-transvenous implantable cardioverter/defibrillator comprising the steps of:
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sensing cardiac signal information from one or more far field sensors implanted in a patient;
amplifying the sensed cardiac signal information;
filtering the amplified cardiac signal information;
measuring one or more parameters of the filtered cardiac signal information; and
processing and integrating the one or more parameters of the cardiac signal information;
wherein, the step of amplifying the cardiac signal information further comprises the step of amplifying the cardiac signal information to a CMRR value of at least approximately 80 dB.
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92. A non-transvenous implantable cardioverter/defibrillator comprising:
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at least one far field electrode;
an amplifier coupled to the at least one far field electrode;
at least one filter coupled to the amplifier;
a timing detector coupled to the at least one filter;
a converter coupled to the at least one filter;
at least one parameter detector coupled to the converter; and
a parameter integrator;
wherein the amplifier further comprises a CMRR value of at least approximately 70 db.
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93. A non-transvenous implantable cardioverter/defibrillator comprising:
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at least one far field electrode;
an amplifier coupled to the at least one far field electrode;
at least one filter coupled to the amplifier;
a timing detector coupled to the at least one filter;
a converter coupled to the at least one filter;
at least one parameter detector coupled to the converter; and
a parameter integrator;
wherein at least one filter further comprises a narrow-band filter with corners set at approximately 10 Hz and 30 Hz.
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Specification