Leadless cardiac stimulation systems
First Claim
Patent Images
1. A system comprising:
- a control unit configured with an antenna sized and shaped to produce a magnetic field; and
an implantable wireless batteryless electrostimulation electrode assembly configured (1) to receive magnetic energy from the magnetic field, (2) to directly convert the received magnetic energy into a specified tissue electrostimulation waveform without storing the received energy in a discrete capacitive storage device and without storing the received energy in an electrochemical storage device, (3) to be implanted from within a heart chamber into a heart chamber inner wall tissue site and to deliver the tissue electrostimulation waveform to the heart chamber inner wall tissue site in response to the magnetic field, and (4) to inhibit the delivery of the tissue electrostimulation waveform in response to the absence of the magnetic field.
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Abstract
Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrode assemblies that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Also disclosed are various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.
416 Citations
28 Claims
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1. A system comprising:
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a control unit configured with an antenna sized and shaped to produce a magnetic field; and an implantable wireless batteryless electrostimulation electrode assembly configured (1) to receive magnetic energy from the magnetic field, (2) to directly convert the received magnetic energy into a specified tissue electrostimulation waveform without storing the received energy in a discrete capacitive storage device and without storing the received energy in an electrochemical storage device, (3) to be implanted from within a heart chamber into a heart chamber inner wall tissue site and to deliver the tissue electrostimulation waveform to the heart chamber inner wall tissue site in response to the magnetic field, and (4) to inhibit the delivery of the tissue electrostimulation waveform in response to the absence of the magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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producing a magnetic field at a control unit at a first location; receiving a magnetic field at an implantable wireless batteryless electrostimulation electrode assembly at a second location, the second location being a heart chamber inner wall accessed from within a heart chamber; converting the received magnetic field into a specified tissue electrostimulation waveform without storing energy from the received magnetic field in a discrete capacitor and without storing the energy in an electrochemical storage device; delivering the tissue electrostimulation waveform to a heart chamber inner wall tissue site in response to the magnetic field; and inhibiting delivery of the tissue electro stimulation waveform in response to the absence of the magnetic field. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A system comprising:
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an implantable control unit comprising; an antenna comprising a wire loop to produce a magnetic field; a battery configured to supply power to the implantable control unit; a capacitor electrically coupled with the antenna; and a controllable switch that controls a charge level associated with the capacitor; and an implantable wireless batteryless electrostimulation electrode assembly configured (1) to receive magnetic energy from the magnetic field, (2) to directly convert the received magnetic energy into a specified tissue electrostimulation waveform without storing the received energy in a discrete capacitive storage device and without storing the received energy in an electrochemical storage device, (3) to be implanted from within a heart chamber into a heart chamber inner wall and to deliver the tissue electrostimulation waveform to a heart chamber inner wall tissue site in response to the magnetic field, (4) to inhibit the delivery of the tissue electrostimulation waveform in response to the absence of the magnetic field; and wherein the control unit is configured to generate a specified magnetic field waveform, and in response, the wireless batteryless implantable electrostimulation electrode assembly is configured to generate a tissue electrostimulation waveform sufficient to provide a pacing level to the heart chamber inner wall tissue site. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method comprising:
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delivering an implantable wireless batteryless electrostimulation electrode assembly to an interior surface of a heart chamber wherein the implantable wireless batteryless electrostimulation electrode assembly is sized and shaped for implantation via an intravascular route; and anchoring the implantable wireless batteryless electrostimulation electrode assembly into a myocardial wall tissue site accessed from within a heart chamber; implanting a control unit at an intra-body location external to a heart chamber; energizing an antenna to produce a magnetic field in a heart chamber; receiving the magnetic field at an implantable wireless electrostimulation electrode assembly; and activating the control unit to energize the antenna and to produce a magnetic field such that the implantable wireless batteryless electrostimulation electrode assembly receives and directly converts, without storing energy from the received magnetic field in a discrete capacitor and without storing the energy in an electrochemical storage device, a portion of the energy from the received magnetic field into a specified tissue electrostimulation waveform at the myocardial tissue wall site. - View Dependent Claims (26, 27, 28)
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Specification