Implantable medical device with automatic adjustment to externally generated shocks
First Claim
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1. An implantable cardiac stimulator comprising a hermetically sealed container;
- a battery within said container;
a control circuit connected to said battery for providing a stimulating electrical pulse to the heart;
means coupled to said control circuit for delivering said stimulating pulse to the heart;
a detector for detecting the presence of an externally generated electrical shock;
an adjustment circuit responsive to said detector for causing said control circuit to increase the magnitude of said stimulating electrical pulse.
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Abstract
An implantable cardiac stimulator, which may include cardioversion and pacemaker capabilities, which has apparatus for detecting an externally applied shock, such as a defibrillation or cardioverting shock. In response to detection of such a shock, the cardiac stimulator has apparatus to adjust the parameters of applied therapy, or to select alternative therapy, including, but not limited to, adjusting the magnitude of stimulus pulses for a predetermined length of time. The risk of loss of capture, and consequent failure of cardiac function, following an externally applied shock is thereby reduced.
34 Citations
15 Claims
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1. An implantable cardiac stimulator comprising a hermetically sealed container;
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a battery within said container; a control circuit connected to said battery for providing a stimulating electrical pulse to the heart; means coupled to said control circuit for delivering said stimulating pulse to the heart; a detector for detecting the presence of an externally generated electrical shock; an adjustment circuit responsive to said detector for causing said control circuit to increase the magnitude of said stimulating electrical pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification