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Medical device ECG marker for use in compressed data stream

  • US 20020026122A1
  • Filed: 10/10/2001
  • Published: 02/28/2002
  • Est. Priority Date: 07/14/1999
  • Status: Active Grant
First Claim
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1. An Implantable medical device (IMD) having electrodes suitable for chronic contact with internal tissue in a living body so as to receive physiologically originated electrical signals via said contact, said IMD having a hermetically sealed housing through which said electrodes are connected to provide said physiologically originated electrical signals to at least one conductor inside said housing, said IMD comprising:

  • an ECG sensing circuit inside said housing for receiving said physiologically originated electrical signals from said at least one conductor and for generating ECG sample signals having values representative of a feature in said physiologically originated electrical signals at a sampling rate, an activation triggering circuit inside said housing, also in electrical connection to said at least one conductor, for sensing a triggering event and for generating and providing as output, a trigger signal in the presence of triggering events, a memory circuit connected to receive data signals and to store or retrieve said data signals under control of a processor circuit, said processor circuit for reacting to said trigger signal to initiate storage into said memory of a group of said ECG sample signals as ECG data signals and for storing a triggering event signal as an additional data signal in said group of ECG sample signals as one data signal.

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