Implantable medical device having means for discriminating between true R-waves and ventricular fibrillation
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United States of America Patent
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Apr 29, 1997
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N/A
app pub date -
Dec 5, 1995
filing date -
Dec 5, 1995
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Abstract
An improved 'VF immune' cardiac event detector for an implantable medical device consists of high-frequency and a low-frequency delta converters coupled to an intracardiac signal. The high-frequency delta converter is tuned to be responsive to R-waves and VF waveforms. However, the low-frequency delta converter is tuned to be responsive only to VF waveforms. By monitoring the difference between the outputs of the high-frequency and the low-frequency delta converters, the system can effectively discriminate between 'true' R-waves and VF waveforms.
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