Active implantable medical device, in particular a pacemaker, defibrillator and/or cardiovertor of the multisite type, capable of detecting induced tachycardia
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United States of America Patent
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-
Sep 23, 2003
Grant Date -
Jun 28, 2001
app pub date -
Dec 1, 2000
filing date -
Dec 2, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An active implantable medical device, in particular a pacemaker, defibrillator and/or cardiovertor of the multisite type, capable of detecting an induced tachycardia. Such a device is to be coupled to electrodes placed in at least two cardiac sites of the same cardiac chamber type, e.g., at least two ventricular sites, right and left, at least two atrial sites, right and left, or at least two sites of the same cavity (atria or ventricular). The device has a cardiac signal collection circuit to detect a depolarization potential, and a stimulation circuit to apply stimulation pulses to at least certain of the aforesaid sites. The device monitors the heart rate, detects suspicion of an induced tachycardia condition, operating in response to the heart rate and determines the presence of an induced tachycardia condition if the heart rate exceeds a predetermined threshold for a length of time greater than a predetermined threshold, and temporarily modifies the operation of the device in the event of the detection of an induced tachycardia condition to cause the induced tachycardia condition to disappear.
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