SYSTEM AND METHOD FOR DETECTING ELECTRIC EVENTS IN CHAMBERS OF A HEART
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Abstract
In a system and method for detecting electrical cardiac events, and a heart stimulator embodying such a system, cardiac events are detected in respective chambers of a heart by sensing electrical signals in at least two different chambers of the heart and forming a difference signal from the sensed signals, and using the difference signal to automatically distinguish between events originating from one of the chambers and events originating in another of the chambers. At least one of the sensed signals is sensed in a coronary vein on the left atrium or the left ventricle.
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Citations
44 Claims
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1-22. -22. (canceled)
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23. A system for detecting electrical cardiac events in chambers of a heart, comprising:
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a plurality of leads, each carrying at least one electrode, configured for implantation respectively in at least two different chambers of a heart for sensing electrical signals in said at least two different chambers; a difference former electrically connected to said plurality of leads and configured to form a difference signal from respective signals sensed by the electrodes carried by the respective leads; an event detector supplied with said difference signal and configured to distinguish, from said difference signal, between events originating in one of said at least two different chambers and events originating in another of said at least two different chambers; and at least one of said leads being configured for implantation in a coronary vein for sensing a left atrial signal or a left ventricular signal. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. An implantable cardiac stimulator comprising:
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a stimulation pulse delivery system configured to interact with a heart to deliver stimulation pulses to cardiac tissue of the heart; a plurality of leads, each carrying at least one electrode, configured for implantation respectively in at least two different chambers of a heart for sensing electrical signals in said at least two different chambers;
a difference former electrically connected to said plurality of leads and configured to form a difference signal from respective signals sensed by the electrodes carried by the respective leads, an event detector supplied with said difference signal and configured to distinguish, from said difference signal, between events originating in one of said at least two different chambers and events originating in another of said at least two different chambers, and at least one of said leads being configured for implantation in a coronary vein for sensing a left atrial signal or a left ventricular signal; anda control unit configured to operate said stimulation pulse delivery system dependent on said events detected by said system for detecting electrical cardiac events. - View Dependent Claims (33, 34, 35)
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36. A method for detecting electrical cardiac events in chambers of a heart, comprising the steps of:
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sensing electrical signals respectively in at least two different chambers of the heart, including sensing with an electrode located in a coronary vein on the left atrium or on the left ventricle, to obtain respective sensed signals; automatically electronically forming a difference signal from said sensed signals; and using said difference signal, distinguishing electrical events originating from one of said chambers from electrical events originating in another of said chambers. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44)
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Specification