Implantable medical device responsive to MRI induced capture threshold changes
AssigneeCardiac Pacemakers, Inc.
InventorsScott R. Stubbs, Kevin G. Wika
Life of this patent
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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.
Claims13
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.
A method for controlling energy delivered from an implantable medical device to stimulate body tissue within a patient, the method comprising:
- 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.
Dependencies are inferred from the claim text.