Method and apparatus to control delivery of high-voltage and anti-tachy pacing therapy in an implantable medical device
First Claim
1. A system for use in controlling electrical therapy delivered to a heart, comprising:
- a first circuit that is charged to deliver high-voltage electrical stimulation to the heart;
a second circuit to deliver anti-tachy pacing (ATP) therapy to the heart; and
a control circuit coupled to the first and second circuits to adjust a time of initiation of charging of the first circuit relative to a time of delivering ATP therapy by the second circuit for one delivery of ATP therapy relative to another delivery of ATP therapy.
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Accused Products
Abstract
A system and method for delivering both anti-tachy pacing (ATP) therapy and high-voltage shock therapy in response to detection of abnormal cardiac rhythms is disclosed. The system controls the time between delivering ATP therapy and the charging of high-voltage capacitors in preparation for shock delivery based on a predetermined set of criteria. In one embodiment, the inventive system operates in an ATP During Capacitor Charging (ATP-DCC) mode wherein all, or substantially all, of the ATP therapy is delivered during charging of the high-voltage capacitors. Based on evaluation of the predetermined set of criteria, the system may switch to an additional ATP Before Capacitor Charging (ATP-BCC) mode, wherein substantially all of the ATP therapy is delivered prior to charging of the high-voltage capacitor. According to one aspect of the invention, the predetermined set of criteria is based, at least in part, on the effectiveness of previously-delivered ATP therapy.
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Citations
25 Claims
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1. A system for use in controlling electrical therapy delivered to a heart, comprising:
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a first circuit that is charged to deliver high-voltage electrical stimulation to the heart; a second circuit to deliver anti-tachy pacing (ATP) therapy to the heart; and a control circuit coupled to the first and second circuits to adjust a time of initiation of charging of the first circuit relative to a time of delivering ATP therapy by the second circuit for one delivery of ATP therapy relative to another delivery of ATP therapy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for use in delivering electrical stimulation to a heart, comprising:
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delivering anti-tachy pacing (ATP) therapy to a patient'"'"'s heart; charging a high-voltage capacitor in preparation to deliver high voltage electrical stimulation to the heart; and adjusting a time of initiation of charging the high-voltage capacitor in preparation to deliver high-voltage electrical stimulation to the heart in relation to a time of delivering the ATP therapy to the patient'"'"'s heart for one delivery of ATP therapy relative to another delivery of ATP therapy. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification