Multiple pulse defibrillation for subcutaneous implantable cardiac devices
First Claim
1. A method of delivering a subcutaneous defibrillation therapy, comprising:
- sensing a fibrillation event;
determining a fibrillation cycle length associated with the fibrillation event; and
delivering, using one or more subcutaneous non-intrathoracic electrode arrangements, a plurality of defibrillation pulses to treat the fibrillation event, wherein delivery of a latter pulse of the defibrillation pulses subsequent to a former pulse of the defibrillation pulses is separated in time by a first delay associated with the fibrillation cycle length.
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Accused Products
Abstract
Cardiac stimulation methods and systems provide for multiple pulse defibrillation, and involve sensing a fibrillation event, determining a fibrillation cycle length associated with the fibrillation event, and delivering a plurality of defibrillation pulses to treat the fibrillation event. Defibrillation pulses are delivered using a combination of subcutaneous non-intrathoracic electrodes. Delivery of each defibrillation waveform subsequent to a first defibrillation waveform is separated in time by a delay associated with the fibrillation cycle length. Delays between defibrillation waveform delivery may be associated with a percentage of the fibrillation cycle length.
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Citations
36 Claims
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1. A method of delivering a subcutaneous defibrillation therapy, comprising:
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sensing a fibrillation event;
determining a fibrillation cycle length associated with the fibrillation event; and
delivering, using one or more subcutaneous non-intrathoracic electrode arrangements, a plurality of defibrillation pulses to treat the fibrillation event, wherein delivery of a latter pulse of the defibrillation pulses subsequent to a former pulse of the defibrillation pulses is separated in time by a first delay associated with the fibrillation cycle length. - 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 system for delivering a subcutaneous defibrillation therapy, comprising:
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a housing configured for subcutaneous non-intrathoracic placement relative to a patient'"'"'s heart;
detection circuitry provided in the housing, the detection circuitry configured to detect a fibrillation event;
energy delivery circuitry provided in the housing;
one or more electrode arrangements configured for subcutaneous non-intrathoracic placement relative to the patient'"'"'s heart, the one or more electrode arrangements coupled to the detection and energy delivery circuitry; and
a controller provided in the housing and coupled to the detection and energy delivery circuitry, the controller configured to determine a fibrillation cycle length associated with the fibrillation event, the controller coordinating delivery of a latter defibrillation pulse following a delay relative to delivery of a former defibrillation pulse, the delay defining a percentage of the fibrillation cycle length. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A system for delivering a subcutaneous defibrillation therapy, comprising:
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means for sensing a fibrillation event;
means for determining-a fibrillation cycle length associated with the fibrillation event;
means for delivering, using a first combination of subcutaneous non-intrathoracic electrodes, a former defibrillation pulse to treat the fibrillation event; and
means for delivering, using the first combination or a second combination of subcutaneous non-intrathoracic electrodes, a latter defibrillation pulse following a delay relative to delivery of the former defibrillation pulse to treat the fibrillation event, the delay associated with a percentage of the fibrillation cycle length.
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Specification