Extravascular arrhythmia induction
First Claim
1. A method comprising:
- discharging an energy storage module to generate a cardiac pacing pulse;
delivering the pacing pulse to a patient via an extravascular electrode;
discharging the energy storage module further to generate a cardiac shock pulse; and
delivering the shock pulse to the patient via the extravascular electrode after a predetermined time period has elapsed since the delivery of the pacing pulse, wherein the shock pulse is configured to induce an arrhythmia in the heart of the patient, wherein the predetermined time period is between approximately 240 milliseconds and approximately 400 milliseconds.
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Abstract
A cardiac arrhythmia may be induced by delivering a sequence of pulses to a patient via one or more extravascular electrodes. In one example, one or more pacing pulses may be delivered to a patient via an extravascular electrode and a shock pulse may be delivered to the patient the extravascular electrode. In some examples, the pacing pulses and the shock pulse may be generated with energy from a common energy storage module and without interim charging of the module. For example, the pacing and shock pulses may be generated as the energy storage module dissipates. In another example, a cardiac arrhythmia may be induced in a patient by delivering a burst of pulses to a patient via an extravascular electrode. In some cases, the burst of pulses may be generated with energy from a common energy storage module and without interim charging of the energy storage module.
47 Citations
32 Claims
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1. A method comprising:
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discharging an energy storage module to generate a cardiac pacing pulse; delivering the pacing pulse to a patient via an extravascular electrode; discharging the energy storage module further to generate a cardiac shock pulse; and delivering the shock pulse to the patient via the extravascular electrode after a predetermined time period has elapsed since the delivery of the pacing pulse, wherein the shock pulse is configured to induce an arrhythmia in the heart of the patient, wherein the predetermined time period is between approximately 240 milliseconds and approximately 400 milliseconds. - 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 comprising:
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discharging an energy storage module to generate a cardiac pacing pulse; delivering the pacing pulse to a patient via an extravascular electrode; discharging the energy storage module further to generate a cardiac shock pulse; and delivering the shock pulse to the patient via the extravascular electrode after a predetermined time period has elapsed since the delivery of the pacing pulse, wherein the shock pulse is configured to induce an arrhythmia in the heart of the patient, wherein delivering the pacing pulse comprises delivering a sequence of pacing pulses, and wherein delivering the shock pulse comprises delivering the shock pulse after the predetermined time period has elapsed since the delivery of a last pacing pulse of the sequence, and wherein each of the pacing pulses comprises a respective pulse width and the pulse widths of the pacing pulses increase with each successive pacing pulse of the sequence.
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20. A system comprising:
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an extravascular electrode; a therapy module comprising an energy storage module; and a processor that controls the therapy module to discharge the energy storage module to generate a cardiac pacing pulse, deliver the pacing pulse to a patient via the extravascular electrode, discharge the energy storage module further to generate a cardiac shock pulse, and deliver the shock pulse to the patient via the extravascular electrode after a predetermined time period has elapsed since the delivery of the pacing pulse, wherein the shock pulse is configured to induce an arrhythmia in the heart of the patient, wherein the pacing pulse comprises a sequence of pacing pulses, and wherein the processor controls the therapy module to deliver the shock pulse after the predetermined time period has elapsed since the delivery of a last pacing pulse of the sequence, and wherein each of the pacing pulses comprises a respective pulse width and the pulse widths of the pacing pulses increase with each successive pacing pulse of the sequence. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A system comprising:
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an extravascular electrode; a therapy module comprising an energy storage module; and a processor that controls the therapy module to discharge the energy storage module to generate a cardiac pacing pulse, deliver the pacing pulse to a patient via the extravascular electrode, discharge the energy storage module further to generate a cardiac shock pulse, and deliver the shock pulse to the patient via the extravascular electrode after a predetermined time period has elapsed since the delivery of the pacing pulse, wherein the shock pulse is configured to induce an arrhythmia in the heart of the patient, wherein the pacing pulse comprises a sequence of pacing pulses, and wherein the processor controls the therapy module to deliver the shock pulse after the predetermined time period has elapsed since the delivery of a last pacing pulse of the sequence, and wherein each of the pacing pulses comprises a respective amplitude and the amplitudes of the pacing pulses decrease with each successive pacing pulse of the sequence.
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Specification