Method and apparatus to control delivery of high-voltage and anti-tachy pacing therapy in an implantable medical device
First Claim
1. A method for delivering therapy in an implantable medical device, comprising:
- sensing cardiac signals;
detecting a predetermined event in response to the sensed signals;
delivering a first therapy during a first delivery period, substantially simultaneous with coupling of a charging circuit and an energy storage device to generate stored energy on the energy storage device, in response to the predetermined event being detected;
determining whether to deliver the first therapy during a second delivery period subsequent to the first delivery period in response to the predetermined level of stored energy not being generated on the energy storage device;
determining whether there is a predetermined level of stored energy generated on the energy storage device; and
delivering, in response to the first therapy not being delivered during the second delivery period and the predetermined level of stored energy not being generated on the energy storage device, the first therapy during a third delivery period subsequent to the second delivery period.
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Accused Products
Abstract
A method and device for delivering a therapy in response to detection of abnormal cardiac rhythms that includes delivering a first therapy during a first delivery period, substantially simultaneous with coupling of a charging circuit and an energy storage device to generate stored energy on the energy storage device. A determination is made as to whether to deliver the first therapy during a second delivery period subsequent to the first delivery period in response to the predetermined level of stored energy not being generated on the energy storage device. The device then delivers the first therapy during a third delivery period subsequent to the second delivery period in response to the first therapy not being delivered during the second delivery period and the predetermined level of stored energy not being generated on the energy storage device.
37 Citations
25 Claims
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1. A method for delivering therapy in an implantable medical device, comprising:
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sensing cardiac signals; detecting a predetermined event in response to the sensed signals; delivering a first therapy during a first delivery period, substantially simultaneous with coupling of a charging circuit and an energy storage device to generate stored energy on the energy storage device, in response to the predetermined event being detected; determining whether to deliver the first therapy during a second delivery period subsequent to the first delivery period in response to the predetermined level of stored energy not being generated on the energy storage device; determining whether there is a predetermined level of stored energy generated on the energy storage device; and delivering, in response to the first therapy not being delivered during the second delivery period and the predetermined level of stored energy not being generated on the energy storage device, the first therapy during a third delivery period subsequent to the second delivery period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An implantable medical device, comprising:
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means for sensing cardiac signals; means for detecting a predetermined event in response to the sensed signals; means for delivering a first therapy during a first delivery period, substantially simultaneous with coupling of a charging circuit and an energy storage device to generate stored energy on the energy storage device, in response to the predetermined event being detected; means for determining whether to deliver the first therapy during a second delivery period subsequent to the first delivery period; means for determining whether there is a predetermined level of stored energy generated on the energy storage device; and means for delivering, in response to the first therapy not being delivered during the second delivery period and the predetermined level of stored energy not being generated on the energy storage device, the first therapy during a third delivery period subsequent to the second delivery period. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A computer readable medium having computer executable instructions for performing a method comprising:
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sensing cardiac signals; detecting a predetermined event in response to the sensed signals; delivering a first therapy during a first delivery period, substantially simultaneous with coupling of a charging circuit and an energy storage device to generate stored energy on the energy storage device, in response to the predetermined event being detected; determining whether to deliver the first therapy during a second delivery period subsequent to the first delivery period in response to the predetermined level of stored energy not being generated on the energy storage device; determining whether there is a predetermined level of stored energy generated on the energy storage device; and delivering, in response to the first therapy not being delivered during the second delivery period and the predetermined level of stored energy not being generated on the energy storage device, the first therapy during a third delivery period subsequent to the second delivery period.
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25. An implantable medical device, comprising:
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an input circuit sensing cardiac signals; a microprocessor detecting a predetermined event in response to the sensed signals; a first circuit delivering a first therapy a predetermined number of times; a second circuit for delivering a second therapy, the second circuit including an energy storage device to store energy associated with the second therapy and a charging circuit selectively coupled to the energy storage device to generate the stored energy; and a control circuit controlling the first circuit and the second circuit to deliver the first therapy substantially simultaneous with coupling of the charging circuit and the energy storage device in response to the predetermined event being detected, the control circuit decoupling the energy storage device and the charging circuit during a redetect period subsequent to delivery of the first therapy, and recoupling the energy storage device and the charging circuit in response to the microprocessor detecting the predetermined event during the redetect period, wherein the control circuit delivers the first therapy subsequent to the first therapy being delivered the predetermined number of times in response to a predetermined level of stored energy not being generated on the energy storage device.
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Specification