Methods and apparatus for detection and treatment of syncope
First Claim
1. An implantable medical device adapted to be implanted in a patient for detecting and declaring syncopal episodes comprising:
- means for detecting a respiration parameter of the patient;
means for detecting heartbeats and for producing sense event signals related thereto;
heart rate determining means for determining a current heart rate based upon the intervals between successive sense event signals;
means for selecting a threshold heart rate drop as a function of the detected respiration parameter of the patient; and
heart rate drop sensing means for sensing a drop in intrinsic heart rate from the average heart rate that exceeds the threshold heart rate drop and declaring a syncopal episode.
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Abstract
The present invention relates to methods and apparatus for detection and treatment of syncope in an implantable medical device, and particularly to detection of syncope as a function of a predetermined increase in one or more respiration parameter and drop in heart rate and optionally delivering a pacing therapy in response thereto. The onset of a syncopal episode is declared when the patient'"'"'s respiration rate and/or tidal volume and/or minute ventilation increases by a predetermined increment or threshold and a heart rate drops below a threshold heart rate drop. The threshold heart rate drop is preferably established as a function of the change in the respiration parameter.
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Citations
20 Claims
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1. An implantable medical device adapted to be implanted in a patient for detecting and declaring syncopal episodes comprising:
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means for detecting a respiration parameter of the patient;
means for detecting heartbeats and for producing sense event signals related thereto;
heart rate determining means for determining a current heart rate based upon the intervals between successive sense event signals;
means for selecting a threshold heart rate drop as a function of the detected respiration parameter of the patient; and
heart rate drop sensing means for sensing a drop in intrinsic heart rate from the average heart rate that exceeds the threshold heart rate drop and declaring a syncopal episode. - View Dependent Claims (2, 3)
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4. An implantable medical device adapted to be implanted in a patient for detecting and treating syncopal episodes comprising:
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means for detecting a respiration parameter of the patient;
means for detecting heartbeats and for producing sense event signals related thereto;
heart rate determining means for determining a current heart rate based upon the intervals between successive sense event signals;
means for selecting a threshold heart rate drop as a function of the detected respiration parameter of the patient;
heart rate drop sensing means for sensing a drop in intrinsic heart rate from the average heart rate that exceeds the threshold heart rate drop and declaring a syncopal episode; and
therapy delivery means responsive to the declared syncopal episode for delivering a therapy to counter the syncopal episode. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method of operating an implantable medical device adapted to be implanted in a patient for detecting and declaring syncopal episodes comprising:
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detecting a respiration parameter of the patient;
detecting heartbeats and for producing sense event signals related thereto;
determining a current heart rate based upon the intervals between successive sense event signals;
selecting a threshold heart rate drop as a function of the detected respiration parameter of the patient; and
sensing a drop in intrinsic heart rate from the average heart rate that exceeds the threshold heart rate drop and declaring a syncopal episode. - View Dependent Claims (12, 13)
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14. A method of operating an implantable medical device adapted to be implanted in a patient for detecting and treating syncopal episodes comprising:
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detecting a respiration parameter of the patient;
detecting heartbeats and for producing sense event signals related thereto;
determining a current heart rate based upon the intervals between successive sense event signals;
selecting a threshold heart rate drop as a function of the detected respiration parameter of the patient;
sensing means for sensing a drop in intrinsic heart rate from the average heart rate that exceeds the threshold heart rate drop and declaring a syncopal episode; and
delivering a therapy to counter the syncopal episode. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification