Systems and methods for use with an implantable medical device for detecting stroke based on electrocardiac signals
First Claim
1. A method for use with an implantable medical device for implant within a patient, the method comprising:
- sensing electrocardiac signals using the implantable device;
detecting an indication of stroke within the patient based on predetermined changes in the electrocardiac signal; and
controlling at least one diagnostic-based device function in response the indication of the stroke.
1 Assignment
0 Petitions
Accused Products
Abstract
Techniques are provided for detecting stroke within a patient using an implantable medical device in conjunction with an external confirmation system. In one example, a preliminary detection of stroke is performed by a subcutaneous monitor based on an analysis of features of an electrocardiogram (ECG) sensed within the patient. Exemplary ECG features indicative of possible stroke include the onset of prominent U-waves, the onset of notched T-waves, and changes in ST segment duration or QT duration or dynamic trends in these parameters. The monitor transmits a signal indicative of possible stroke to a bedside monitor or other external system, which generates a stroke questionnaire for use in confirming the stroke. Family members or other caregivers input answers to the questionnaire into the external system, which confirms or disconfirms the stroke. Emergency personnel can be automatically notified. Implantable systems that detect stroke based on intracardiac electrogram (IEGM) signals are also described herein.
34 Citations
18 Claims
-
1. A method for use with an implantable medical device for implant within a patient, the method comprising:
-
sensing electrocardiac signals using the implantable device; detecting an indication of stroke within the patient based on predetermined changes in the electrocardiac signal; and controlling at least one diagnostic-based device function in response the indication of the stroke. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A system for use with an implantable medical device for implant within a patient, the system comprising:
-
a electrocardiac signal sensing device for implant within the patient; an on-board stroke detector within the implantable medical device and operative to detect an indication of stroke within the patient based on predetermined changes in the electrocardiac signals indicative of stroke; and a controller within the implantable medical device that is responsive to an indication of stroke to control one or more diagnostic-based device functions. - View Dependent Claims (17)
-
-
18. A system for use with an implantable medical device for implant within a patient, the system comprising:
-
means for sensing electrocardiac signals using the implantable device; means for detecting an indication of stroke within the patient based on predetermined changes in the electrocardiac signal; and means for controlling at least one diagnostic-based device function in response to the indication of stroke.
-
Specification