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MRI-safe defibrillator electrodes

  • US 8,121,705 B2
  • Filed: 06/26/2008
  • Issued: 02/21/2012
  • Est. Priority Date: 06/27/2007
  • Status: Expired due to Fees
First Claim
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1. An implanted medical device, comprising:

  • a cardioverter defibrillator capable of generating a pulse sufficient to defibrillate a heart of a patient; and

    a lead coupled at a proximal end to the cardioverter defibrillator and having a distal end position within the heart of the patient, the distal end of the lead having a defibrillation electrode slideably coupled to a conductor and biased to be in electrical contact with the cardioverter defibrillator outside the presence of an MRI field;

    wherein the defibrillation electrode slides away from the conductor in the presence of an MRI field such that induced voltages are not electrically coupled to the cardioverter defibrillator.

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