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IMPLANTABLE DEVICE WITH POST-MRI CARDIAC SIGNAL SENSING ADJUSTMENT

  • US 20110160602A1
  • Filed: 11/01/2010
  • Published: 06/30/2011
  • Est. Priority Date: 12/30/2009
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • an ambulatory or implantable medical device comprising;

    a cardiac signal sensing circuit; and

    a controller circuit, coupled to the cardiac signal sensing circuit, the controller configured to receive an indication that a magnetic resonance imaging (MRI) scanning procedure has completed and, in response, to automatically test a cardiac signal sensing of the cardiac signal sensing circuit, and to adjust a cardiac signal sensing parameter when a physiological change in depolarization amplitude or lead impedance causes a post-MRI scanning procedure loss of cardiac depolarization sensing.

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