IMPLANTABLE MEDICAL DEVICE WITH SENSING ELECTRODES
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Accused Products
Abstract
An implantable medical device (IMD) with sensing electrodes that are relatively closely spaced subcutaneous electrodes arranged in a subcutaneous electrode array (SEA). The SEA is implemented to enable a leadless orientation-insensitive SEA scheme for receiving ECG signals. The SEA is distributed over the perimeter of the IMD and includes a non-conductive shroud. The shroud can be wider near the SEA electrodes, providing an enhanced signal to noise ratio, and narrower elsewhere to avoid interfering with pacing or defibrillation signals when the case of the medical device is used as an electrode.
63 Citations
40 Claims
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1-20. -20. (canceled)
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21. A cardiac data acquisition system comprising:
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a. an implantable medical device having a case; b. an insulating shroud on the case; c. two or more electrodes disposed on the shroud, the insulating shroud being relatively larger at portions proximate to the electrodes; and d. signal processing circuitry disposed inside the case, the signal processing circuitry being electrically coupled to the electrodes to detect cardiac signals. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. An apparatus for leadless acquisition of electrocardiographic data comprising:
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a. an implantable device case having insulative and conductive regions on the surface of the case, the conductive regions functioning as an indifferent electrode for pacing or defibrillation; and b. sensing electrodes capable of sensing cardiac depolarization, the sensing electrodes disposed on the insulative regions, the insulative regions increasing voltage differentials between the sensing electrodes and the conductive regions without substantially degrading use of the conductive regions for defibrillation or pacing. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35)
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36. An insulating shroud mechanism for an implantable medical device comprising:
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a. a shroud configured to be attached to the perimeter of a generally planar implantable medical device, the shroud having a length generally oriented around the perimeter and a width generally perpendicular to the length; b. at least one site on the shroud configured to house an electrode, the shroud being wider proximate the at least one site than along the balance of the length of the shroud. - View Dependent Claims (37, 38, 39, 40)
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Specification