Combination pacemaker and defibrillator having dynamic ventricular refractory period
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United States of America Patent
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Aug 11, 1998
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N/A
app pub date -
Jan 27, 1997
filing date -
Jan 27, 1997
priority date (Note) -
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Abstract
An implantable cardiac stimulator having a bradycardia pacer and a defibrillator in a common housing and sharing common atrial and ventricular sense circuits includes circuitry for defining a dynamic paced refractory interval that is inversely proportional to the pacing rate to thereby allow adequate time in the cardiac cycle for sensing ventricular events even at elevated pacing rates such as when the atrial tracking rate approaches a programmed upper rate limit for the pacemaker or a sensor driven rate approaches the programmed upper rate limit.
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