Cardiac mechanical vibration monitor using information indicative of lead motion
First Claim
1. An apparatus including an implantable medical device (IMD), the IMD including:
- an excitation circuit configured to provide a non-tissue stimulating, non-therapeutic electrical excitation signal to a conductor comprising a portion of an implantable lead, the excitation signal comprising a time-varying signal including a first range of frequencies;
a receiver circuit electrically coupled to the conductor, the receiver circuit configured to receive, in response to the excitation signal, a response signal modulated according to a change in an electrical characteristic of the conductor, the response signal including information about the excited conductor itself that is indicative of a mechanical vibration of the implantable lead due at least in part to one or more of impact of at least a portion of a heart to the implantable lead or friction between the implantable lead and cardiac tissue; and
a processor circuit configured to determine one or more of a lead mechanical status, or information indicative of valvular activity, using the information about the excited conductor itself that is indicative of the mechanical vibration of the implantable lead.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods to monitor cardiac mechanical vibrations using information indicative of lead motion are described. In an example, a system including an implantable medical device can include an excitation circuit configured to provide a non-tissue stimulating, non-therapeutic electrical excitation signal to a portion of an implantable lead. A receiver circuit can be configured to obtain information indicative of a mechanical vibration of the implantable lead due at least in part to one or more of an impact of at least a portion of the heart to the implantable lead, or friction contact between the implantable lead and cardiac tissue. The system can include a processor circuit configured to determine one or more of a lead mechanical status, or information indicative of valvular activity using the information indicative of the mechanical vibration of the implantable lead.
48 Citations
21 Claims
-
1. An apparatus including an implantable medical device (IMD), the IMD including:
-
an excitation circuit configured to provide a non-tissue stimulating, non-therapeutic electrical excitation signal to a conductor comprising a portion of an implantable lead, the excitation signal comprising a time-varying signal including a first range of frequencies; a receiver circuit electrically coupled to the conductor, the receiver circuit configured to receive, in response to the excitation signal, a response signal modulated according to a change in an electrical characteristic of the conductor, the response signal including information about the excited conductor itself that is indicative of a mechanical vibration of the implantable lead due at least in part to one or more of impact of at least a portion of a heart to the implantable lead or friction between the implantable lead and cardiac tissue; and a processor circuit configured to determine one or more of a lead mechanical status, or information indicative of valvular activity, using the information about the excited conductor itself that is indicative of the mechanical vibration of the implantable lead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A processor-readable medium comprising instructions that, when performed by a processor, cause the processor to:
-
provide a non-tissue stimulating, non-therapeutic electrical excitation signal to a conductor comprising a portion of an implantable lead, the excitation signal comprising a time-varying signal including a first range of frequencies; receive, in response to the excitation signal, a response signal modulated according to a change in an electrical characteristic of the conductor, the response signal including information about the excited conductor itself that is indicative of a mechanical vibration of the implantable lead due at least in part to one or more of impact of at least a portion of a heart with the implantable lead or friction between the implantable lead and cardiac tissue; and determine one or more of a lead mechanical status, or information indicative of valvular activity using the information about the excited conductor itself that is indicative of the mechanical vibration of the implantable lead. - View Dependent Claims (17, 18, 19, 20)
-
-
21. A system, comprising:
-
a means for providing a non-tissue stimulating, non-therapeutic electrical excitation signal to a conductor comprising a portion of an implantable lead, the excitation signal comprising a time-varying signal including a first range of frequencies; a means for receiving, in response to the excitation signal, a response signal modulated according to a change in an electrical characteristic of the conductor, the response signal including information about the excited conductor itself that is indicative of a mechanical vibration of the implantable lead due at least in part to one or more of impact of at least a portion of a heart with the implantable lead or friction between the implantable lead and cardiac tissue; and a means for detecting one or more of a lead mechanical status, or information indicative of valvular activity using the information about the excited conductor itself that is indicative of the mechanical vibration of the implantable lead.
-
Specification