Patent Number: 7,822,475

Title: Method and apparatus for reducing far-field interchamber interference in an implanted medical device

Abstract: An implantable medical device comprises at least two sensing channels for receiving sensed first and second location electrical signals originating from two different locations of a heart. A control unit is connected to the sensing channels and is adapted to process sensed electrical signals originating from first and second locations of the heart. The control unit incorporates an adaptive filter compensator adapted to generate an estimate signal for compensating a far-field contribution of the second location signal to the first location signal, thereby generating an output signal representing a near field signal originating from the first location. A gate is connected to the second location sensing channel and is adapted to enable the adaptive filter compensator only if a predetermined signal is sensed via the second location sensing channel.

Inventors: Schomburg; Richard A. (Hillsboro, OR), de Voir; Christopher S. (Tigard, OR), Muessig; Dirk (West Linn, OR)

Assignee: Biotronik CRM Patent AG

International Classification: A61N 1/365 (20060101)

Expiration Date: 2018-10-26 0:00:00