Apparatus and methods of monitoring cardiac activity utilizing implantable shroud-based electrodes
First Claim
1. A physiologic signal acquisition system including at least one subcutaneous electrode coupled to operative circuitry disposed within a hermetically sealed housing, comprising:
- a hermetically sealed housing for an implantable medical device (IMD);
a shroud member adjacent at least a part of the peripheral portion of the housing, said shroud member including at least one recessed region adapted to receive a substantially planar, plate-type electrode, wherein the substantially planar, plate-type electrode mechanically interlocks to one of;
a peripheral feature and a non-peripheral feature of the at least one recessed region; and
signal processing circuitry mounted inside the housing and electrically coupled to the electrode to detect the cardiac signals.
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Accused Products
Abstract
The present invention provides a subcutaneous (or submuscular) single or multiple-electrode array that provides various embodiments of a compliant surround shroud coupled to a peripheral portion of an implantable medical device (IMD). The shroud incorporates a plurality of substantially planar electrodes mechanically coupled within recessed portions of the shroud. These electrodes electrically couple to IMD circuitry to monitor cardiac activity of a subject. Temporal recordings of the detected cardiac activity are referred to herein as an extra-cardiac electrogram (EC-EGM). The recordings can be stored upon computer readable media within an IMD at various resolution (e.g., continuous beat-by-beat, periodic, triggered, mean value, average value, etc.). Real time or stored EC-EGM signals can be provided to remote equipment via telemetry. For example, when telemetry, or programming, head of an IMD programming apparatus is positioned within range of an IMD the programmer receives some or all of the EC-EGM signals.
31 Citations
20 Claims
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1. A physiologic signal acquisition system including at least one subcutaneous electrode coupled to operative circuitry disposed within a hermetically sealed housing, comprising:
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a hermetically sealed housing for an implantable medical device (IMD);
a shroud member adjacent at least a part of the peripheral portion of the housing, said shroud member including at least one recessed region adapted to receive a substantially planar, plate-type electrode, wherein the substantially planar, plate-type electrode mechanically interlocks to one of;
a peripheral feature and a non-peripheral feature of the at least one recessed region; and
signal processing circuitry mounted inside the housing and electrically coupled to the electrode to detect the cardiac signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for monitoring cardiac activity with electrodes spaced from myocardial tissue, comprising:
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an electrode-receiving recess formed in the periphery of a non-conductive biocompatible shroud member; and
a substantially flat electrode having opposing major surfaces disposed within a major lower portion of the recess and mechanically interlocking with at least two parts of said recess, a first aperture-part and a second protrusion-part.
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Specification