Implantable cardioverter-defibrillator (ICD) system having multiple common polarity extravascular defibrillation electrodes
First Claim
1. An implantable cardioverter-defibrillator (ICD) system comprising:
- an ICD implanted in a patient under the skin and outside of the ribcage, the ICD including;
a housing;
a power source within the housing;
a therapy module within the housing that includes at least one defibrillation capacitor; and
a control module within the housing;
a first electrical stimulation lead having a proximal portion coupled to the ICD and a distal portion having a first defibrillation electrode configured to deliver a defibrillation shock from a substernal location to a heart of the patient, the substernal location being at least partially within the anterior mediastinum; and
a second electrical stimulation lead having a proximal portion coupled to the ICD and a distal portion having a second defibrillation electrode configured to deliver a defibrillation shock to the heart of the patient,wherein the control module is configured to couple the at least one defibrillation capacitor to an electrode vector to deliver a high voltage shock to the heart of the patient, wherein the control module couples the at least one defibrillation capacitor to the first and second defibrillation electrodes concurrently to form a first polarity of the electrode vector and to the housing of the ICD to form a second polarity of the electrical vector.
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Accused Products
Abstract
This disclosure provides an extravascular ICD system and method for defibrillating a heart of a patient. The extravascular ICD system includes multiple extravascular electrical stimulation leads or lead segments located in close proximity to one another and having respective defibrillation electrodes. The ICD system utilizes the multiple defibrillation electrodes to form an extravascular electrode vector that may result a reduction in the shock impedance and/or a reduction in the DFT compared to extravascular ICD systems that include only a single extravascular defibrillation electrode. An ICD of the system may, for example, deliver a defibrillation shock using an electrode vector in which a first polarity of the electrode vector is formed by electrically coupling first and second defibrillation electrodes of first and second leads, respectively, to the therapy circuitry and a second polarity of the electrode vector is formed by electrically coupling a housing of the ICD to the therapy circuitry.
213 Citations
22 Claims
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1. An implantable cardioverter-defibrillator (ICD) system comprising:
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an ICD implanted in a patient under the skin and outside of the ribcage, the ICD including; a housing; a power source within the housing; a therapy module within the housing that includes at least one defibrillation capacitor; and a control module within the housing; a first electrical stimulation lead having a proximal portion coupled to the ICD and a distal portion having a first defibrillation electrode configured to deliver a defibrillation shock from a substernal location to a heart of the patient, the substernal location being at least partially within the anterior mediastinum; and a second electrical stimulation lead having a proximal portion coupled to the ICD and a distal portion having a second defibrillation electrode configured to deliver a defibrillation shock to the heart of the patient, wherein the control module is configured to couple the at least one defibrillation capacitor to an electrode vector to deliver a high voltage shock to the heart of the patient, wherein the control module couples the at least one defibrillation capacitor to the first and second defibrillation electrodes concurrently to form a first polarity of the electrode vector and to the housing of the ICD to form a second polarity of the electrical vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for extravascularly defibrillating a heart of a patient, the method comprising:
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obtaining electrical signals sensed from a substernal location via one or more electrodes in the substernal location; processing the electrical signals to detect a tachyarrhythmia; charging one or more defibrillation capacitors in response to detecting the tachyarrhythmia; electrically coupling the one or more defibrillation capacitors to an electrode vector to deliver a defibrillation therapy to the heart of the patient, the electrode vector including a first polarity formed by a first defibrillation electrode of a first electrical stimulation lead and a second defibrillation electrode of a second electrical stimulation lead and a second polarity formed by a housing of an implantable cardioverter-defibrillator (ICD), wherein the first defibrillation electrode is implanted at least partially in the substernal location. - View Dependent Claims (17, 18, 19, 20)
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21. An implantable cardioverter-defibrillator (ICD) system comprising:
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an ICD implanted in a patient under the skin and outside of the ribcage, the ICD including; a housing; a power source within the housing; a therapy module within the housing that includes at least one defibrillation capacitor; and a control module within the housing; an electrical stimulation lead having a lead body that includes a proximal portion configured to be coupled to the ICD and a distal portion that includes a first lead segment having a first defibrillation electrode configured to deliver a defibrillation shock from a substernal location to a heart of the patient, the first electrode being implanted at least partially along a posterior side of a sternum of the patient in the substernal location, and second lead segment having a second defibrillation electrode configured to deliver a defibrillation shock to the heart of the patient, wherein the control module is configured to couple the at least one defibrillation capacitor to an electrode vector to deliver a high voltage shock to the heart of the patient, wherein the control module couples the at least one defibrillation capacitor to the first and second defibrillation electrodes concurrently to form a first polarity of the electrode vector and to the housing of the ICD to form a second polarity of the electrical vector. - View Dependent Claims (22)
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Specification