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AI Biotech/Diagnostics: Cardio
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Application US20190151666
Published 2019-05-23
Autonomous Cardiac Implant Of The "leadless Capsule" Type, With Detection Of Atrial Activity By Analysis Of The Charging Electric Signal Delivered By An Energy Harvesting Module
An energy harvester converts into electrical energy the external stresses applied to the implant at the heartbeat rhythm. This harvester includes an inertial unit and a transducer delivering an oscillating electrical signal that is rectified and regulated for powering the implant and charging an energy storage component. The instantaneous variations of this electrical signal are analyzed in a detection window following or preceding a ventricular contraction, to obtain atrial activity information representative of the atrium contribution to the electric signal, in particular information about the presence/absence of a spontaneous atrial contraction, and/or parameters making it possible to determine an atrioventricular delay to be applied if the ventricle has to be stimulated.
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- 1. An autonomous cardiac implant of the leadless capsule type, comprising an implant body provided with means for anchoring to a cardiac wall, the implant body accommodating an electronic unit and an energy harvesting module with an energy storage component for powering the electronic unit, the energy harvesting module being adapted to convert into electrical energy external stresses applied to the implant body under the effect of movements of a wall to which the implant is anchored and/or of blood flow variations in the environment surrounding the implant at the heartbeat rhythm and/or of cardiac tissue vibrations, wherein the energy harvesting module comprises:
an inertial unit subjected to said external stresses; a transducer adapted to convert the mechanical energy produced by the oscillations of the inertial unit into an oscillating electrical signal; and a power management circuit, adapted to rectify and regulate said oscillating electrical signal, to deliver as an output a stabilized direct voltage or current, for powering said electronic unit and/or charging said energy storage component, and wherein the implant further comprises atrial detection means, adapted to analyze, between successive beats, the oscillating electrical signal to derive therefrom atrial activity information likely to prove in said heartbeats the presence of an atrial event and/or to characterize the instant of occurrence thereof.
