Leadless intra-cardiac medical device with dual chamber sensing through electrical and/or mechanical sensing
First Claim
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1. A leadless intra-cardiac medical device, comprising:
- a housing configured to be positioned entirely within an intra-cardiac space;
at least one first electrode located at a distal section of the housing;
at least one second electrode; and
a processing circuit located within an interior space of the housing and electrically coupled to the at least one first electrode and the at least one second electrode, wherein the processing circuit is configured to;
determine whether at least one ventricular event occurred based on near-field signals sensed using the at least one first electrode,determine whether at least one atrial event occurred based on far-field signals sensed using the at least one second electrode; and
generate at least one cardiac stimulation pulse based on the determination of whether the at least one ventricular event occurred and the determination of whether the at least one atrial event occurred.
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Abstract
A leadless intra-cardiac medical device senses cardiac activity from multiple chambers and applies cardiac stimulation to at least one cardiac chamber and/or generates a cardiac diagnostic indication. The leadless device may be implanted in a local cardiac chamber (e.g., the right ventricle) and detect near-field signals from that chamber as well as far-field signals from an adjacent chamber (e.g., the right atrium).
183 Citations
33 Claims
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1. A leadless intra-cardiac medical device, comprising:
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a housing configured to be positioned entirely within an intra-cardiac space; at least one first electrode located at a distal section of the housing; at least one second electrode; and a processing circuit located within an interior space of the housing and electrically coupled to the at least one first electrode and the at least one second electrode, wherein the processing circuit is configured to; determine whether at least one ventricular event occurred based on near-field signals sensed using the at least one first electrode, determine whether at least one atrial event occurred based on far-field signals sensed using the at least one second electrode; and generate at least one cardiac stimulation pulse based on the determination of whether the at least one ventricular event occurred and the determination of whether the at least one atrial event occurred. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A leadless intra-cardiac medical device that does not employ electrodes for cardiac sensing, comprising:
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a housing adapted to be positioned entirely within an intra-cardiac space; at least one electro-mechanical sensor located within an interior space of the housing; and a processing circuit located within the interior space of the housing and electrically coupled to the at least one electro-mechanical sensor, wherein the processing circuit is configured to; determine, based on signals received from the at least one electro-mechanical sensor, whether at least one ventricular event occurred and whether at least one atrial event occurred; and generate at least one cardiac stimulation pulse based on the determination of whether the at least one ventricular event occurred and whether the at least one atrial event occurred. - View Dependent Claims (23, 24, 25)
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26. A leadless intra-cardiac medical device, comprising:
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a housing configured to be positioned entirely within an intra-cardiac space; at least one first electrode located adjacent an exterior surface of the housing; at least one second electrode located adjacent the exterior surface of the housing; and a processing circuit located within an interior space of the housing and electrically coupled to the at least one first electrode and the at least one second electrode, wherein the processing circuit is configured to; sense near-field signals in an atrium using the at least one first electrode; sense far-field signals in the atrium using the at least one second electrode; identify atrial events based on the sensed near-field signals; identify ventricular events based on the sensed far-field signals; determine timing intervals based on the identified atrial events and the identified ventricular events; and generate a cardiac diagnostic indication based on the timing intervals. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A cardiac diagnostic method, comprising:
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sensing near-field signals in an atrium using at least one first electrode of a leadless intra-cardiac medical device configured to be positioned entirely within an intra-cardiac space; sensing far-field signals in the atrium using at least one second electrode of a leadless intra-cardiac medical device configured to positioned entirely within an intra-cardiac space; identifying atrial cardiac events based on the sensed near-field signals; identifying ventricular events based on the sensed far-field signals; determining timing intervals based on the identified atrial events and the identified ventricular events; and generating a cardiac diagnostic indication based on the timing intervals. - View Dependent Claims (33)
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Specification