Active implantable medical device enslaved to a signal of accele

Details Active implantable medical device enslaved to a signal of accele Active implantable medical device enslaved to a signal of accele

1997-11-20

1999-08-10

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 18, A61N 1362

Patent

active

059351535

ABSTRACT:
An active implantable medical device, particularly a cardiac pacemaker, which is enslaved to a signal representative of acceleration, having a measuring circuit (10) comprising at least one sensor (12) delivering a signal of acceleration, and circuits (22-24) to deliver, in response to the signal of acceleration, a parameter of enslavement of at least one function of the device, particularly that of a cardiac stimulation frequency. According to the invention, a circuit (24) operates to limit, in the detection of increase in acceleration, a value linked to the module of the signal of acceleration. Preferably, the limitation is operated on a value proportional to the square of the signal of acceleration, more particularly on a quadratic sum of individual acceleration components (X.sub.i, Y.sub.i, Z.sub.i) according to at least two distinct axes delivered by a respective number of sensors.

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