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Implantable medical device sensing and selecting wireless ECG and intracardiac electrogram

  • US 9,138,590 B2
  • Filed: 06/27/2012
  • Issued: 09/22/2015
  • Est. Priority Date: 10/28/2004
  • Status: Active Grant
First Claim
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1. A cardiac rhythm management (CRM) system, comprising:

  • an implantable medical device including;

    a sensing circuit including an electrogram sensing circuit to sense one or more intracardiac electrograms and a wireless electrocardiogram (ECG) sensing circuit to sense one or more subcutaneous ECGs;

    a processing circuit to receive and process at least one signal selected from the one or more intracardiac electrograms and the one or more subcutaneous ECGs based on a selection signal; and

    a signal selection circuit coupled to the processing circuit, the signal selection circuit including a signal quality assessment circuit and a selection signal generator, the signal quality assessment circuit adapted to produce quality parameters by analyzing each of the one or more intracardiac electrograms and the one or more subcutaneous ECGs during a specified cardiac rhythm including a normal sinus rhythm or a cardiac arrhythmia, the quality parameters each being a measure of quality of one cardiac signal of the one or more intracardiac electrograms and the one or more subcutaneous ECGs, the quality parameters including at least a first quality parameter generated by analyzing morphology of one of the one or more intracardiac electrograms and at least a second quality parameter generated by analyzing morphology of one of the one or more subcutaneous ECGs, the selection signal generator adapted to produce the selection signal based on at least a comparison between the at least the first quality parameter and the at least the second quality parameter; and

    a plurality of implantable subcutaneous electrodes coupled to the sensing circuit.

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