SINGLE CHAMBER LEADLESS INTRA-CARDIAC MEDICAL DEVICE HAVING DUAL CHAMBER SENSING WITH SIGNAL DISCRIMINATION
First Claim
1. A leadless intra-cardiac medical device (LIMD) configured to be implanted entirely within a single local chamber of the heart and remote from an adjacent chamber of the heart, the LIMD comprising:
- a housing having a proximal end configured to engage local tissue of interest in the local chamber and a distal end;
electrodes located at multiple locations along the housing;
sensing circuitry configured to define a far field (FF) channel between a first combination of the electrodes to sense FF signals;
the sensing circuitry configured to define a near field (NF) channel between a second combination of the electrodes to sense NF signals; and
a controller configured to analyze the NF and FF signals to determine whether the NF and FF signals collectively indicate that a validated event of interest occurred in the adjacent chamber.
1 Assignment
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Accused Products
Abstract
A leadless intra-cardiac medical device (LIMD) includes multiple electrodes that allow for stimulation and sensing of the right ventricle (RV) and sensing of the right atrium (RA), even though it is entirely located in the RV. The LIMD includes a housing having a proximal end configured to engage local tissue in the local chamber and electrodes located at multiple locations along the housing. Sensing circuitry is configured to define a far field (FF) channel between a first combination of the electrodes to sense FF signals occurring in the adjacent chamber. The sensing circuitry is configured to define a near field (NF) channel between a second combination of the electrodes to sense NF signals occurring in the local chamber. A controller is configured to analyze the NF and FF signals to determine whether the NF and FF signals collectively indicate that a validated event of interest occurred in the adjacent chamber.
151 Citations
22 Claims
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1. A leadless intra-cardiac medical device (LIMD) configured to be implanted entirely within a single local chamber of the heart and remote from an adjacent chamber of the heart, the LIMD comprising:
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a housing having a proximal end configured to engage local tissue of interest in the local chamber and a distal end; electrodes located at multiple locations along the housing; sensing circuitry configured to define a far field (FF) channel between a first combination of the electrodes to sense FF signals; the sensing circuitry configured to define a near field (NF) channel between a second combination of the electrodes to sense NF signals; and a controller configured to analyze the NF and FF signals to determine whether the NF and FF signals collectively indicate that a validated event of interest occurred in the adjacent chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22)
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14. A method for sensing cardiac activity from a leadless intra-cardiac medical device (LIMD) configured to be implanted entirely within a single local chamber of the heart and remote from an adjacent chamber, the method comprising:
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sensing far field (FF) signals over a FF channel between a first combination of electrodes provided on the LIMD in the local chamber; sensing near field (NF) signals over a NF channel between a second combination of electrodes provided on the LIMD in the local chamber; and analyzing both of the NF and FF signals to determine whether the NF and FF signals indicate that a validated event of interest occurred in the adjacent chamber.
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Specification