Implantable cardiac stimulation device having automatic sensitivity control and method

   
   

An implantable cardiac stimulation device and method provides reliable sensing of cardiac events to support cardiac pacing or fibrillation detection. The device comprises a sensing circuit that senses the cardiac events in accordance with a plurality of threshold characterizing parameters. A parameter control adjusts the threshold parameters responsive to the rate of the sensed cardiac events in a manner which precludes positive feedback to prevent continued oversensing, undersensing, or noise sensing.

Um dispositivo e um método cardiac implantable do stimulation fornecem detetar de confiança de eventos cardiac para suportar a deteção cardiac passear ou de fibrillation. O dispositivo compreende um circuito detetando que detete os eventos cardiac de acordo com um plurality do ponto inicial que caracteriza parâmetros. Um controle do parâmetro ajusta os parâmetros do ponto inicial responsivos à taxa dos eventos cardiac detetados em uma maneira que impossibilite o gabarito positivo para impedir oversensing continuado, undersensing, ou em detetar do ruído.

 
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