Implantable cardiac defibrillator employing a digital waveform analyzer system
First Claim
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1. An implantable medical device comprising:
- electrode means adapted to be coupled to a patient'"'"'s heart;
sensing means having an input connected to said electrode means for sensing analog ECG heart signals;
analog-to-digital means for converting the analog ECG heart signal into a digitized ECG heart signal; and
waveform analyzer means responsive to said analog-to-digital converter means for performing signal conditioning and processing of the digitized ECG heart signal; and
means for providing signals from said waveform analyzer means to a microprocessor.
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Abstract
An implantable medical device includes electrodes coupled to a patient'"'"'s heart and sensing circuitry having inputs connected to the electrodes for sensing cardiac electrical signals. The sensing circuitry includes a digital waveform analyzer system which performs direct analysis of digitized ECG heart signals from the atrial and/or ventricular channels. This eliminates the need for the system microprocessor to perform direct analysis on raw ECG data. The benefit being that complex software algorithms are not required, saving microprocessor memory space. System current drain is also reduced since the microprocessor need not be active during every ECG sample.
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Citations
9 Claims
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1. An implantable medical device comprising:
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electrode means adapted to be coupled to a patient'"'"'s heart; sensing means having an input connected to said electrode means for sensing analog ECG heart signals; analog-to-digital means for converting the analog ECG heart signal into a digitized ECG heart signal; and waveform analyzer means responsive to said analog-to-digital converter means for performing signal conditioning and processing of the digitized ECG heart signal; and
means for providing signals from said waveform analyzer means to a microprocessor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification