Implantable medical device responsive to MRI induced capture threshold changes
First Claim
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1. A method for controlling energy delivered from an implantable medical device to stimulate body tissue within a patient, the method comprising:
- changing energy delivered to stimulate the tissue from a first energy state to a second energy state during a magnetic resonance imaging (MRI) scan;
maintaining the energy delivered at the second energy state after the MRI scan;
measuring a capture threshold of the tissue after the maintaining step; and
adjusting the energy delivered based on the measured capture threshold of the tissue.
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Abstract
Energy delivered from an implantable medical device to stimulate tissue within a patient'"'"'s body is controlled. An electrical signal used to stimulate the tissue is changed from a first energy state to a second energy state during a magnetic resonance imaging (MRI) scan. The energy delivered is maintained at the second energy state after the MRI scan. A capture threshold of the tissue is then measured, and the energy delivered to the tissue is adjusted based on the measured capture threshold of the tissue.
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Citations
13 Claims
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1. A method for controlling energy delivered from an implantable medical device to stimulate body tissue within a patient, the method comprising:
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changing energy delivered to stimulate the tissue from a first energy state to a second energy state during a magnetic resonance imaging (MRI) scan; maintaining the energy delivered at the second energy state after the MRI scan; measuring a capture threshold of the tissue after the maintaining step; and adjusting the energy delivered based on the measured capture threshold of the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling energy delivered from an implantable medical device to stimulate body tissue within a patient, the method comprising:
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delivering energy having a first energy level to stimulate the tissue; detecting magnetic resonance imaging (MRI) scan fields; increasing the energy delivered from the first energy level to a second energy level; maintaining the energy delivered at the second energy level after the MRI scan fields are no longer detected; measuring a capture threshold of the tissue after the maintaining step; and adjusting the energy delivered by the implantable medical device based on the measured capture threshold of the tissue. - View Dependent Claims (10, 11, 12, 13)
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Specification