IMPLANTABLE DEVICE WITH POST-MRI CARDIAC SIGNAL SENSING ADJUSTMENT
First Claim
Patent Images
1. An apparatus comprising:
- an ambulatory or implantable medical device comprising;
a cardiac signal sensing circuit; and
a controller circuit, coupled to the cardiac signal sensing circuit, the controller configured to receive an indication that a magnetic resonance imaging (MRI) scanning procedure has completed and, in response, to automatically test a cardiac signal sensing of the cardiac signal sensing circuit, and to adjust a cardiac signal sensing parameter when a physiological change in depolarization amplitude or lead impedance causes a post-MRI scanning procedure loss of cardiac depolarization sensing.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can include an automatic testing and adjusting of cardiac signal sensing after an MRI scanning procedure, such as to accommodate an MRI-induced physiological change in sensed cardiac depolarization amplitude or in lead impedance such as at an electrode/tissue interface.
-
Citations
20 Claims
-
1. An apparatus comprising:
an ambulatory or implantable medical device comprising; a cardiac signal sensing circuit; and a controller circuit, coupled to the cardiac signal sensing circuit, the controller configured to receive an indication that a magnetic resonance imaging (MRI) scanning procedure has completed and, in response, to automatically test a cardiac signal sensing of the cardiac signal sensing circuit, and to adjust a cardiac signal sensing parameter when a physiological change in depolarization amplitude or lead impedance causes a post-MRI scanning procedure loss of cardiac depolarization sensing. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
8. An apparatus comprising:
an ambulatory or implantable medical device comprising; a cardiac signal sensing circuit; and a controller circuit, coupled to the cardiac signal sensing circuit, the controller configured to receive an indication that a magnetic resonance imaging (MRI) scanning procedure has completed and, in response, to automatically test a cardiac signal sensing of the cardiac signal sensing circuit, and to adjust a cardiac signal sensing parameter when a physiological change in depolarization amplitude or lead impedance causes a post-MRI scanning procedure loss of cardiac depolarization sensing; and a communication circuit, coupled to the controller circuit, wherein the communication circuit is configured to communicate from the implantable medical device at least one of;
a report indicative of a cardiac signal sensing parameter that was automatically altered in response to post-MRI scanning procedure testing of the cardiac signal sensing;
or, an alert indicative of loss of cardiac signal sensing after the MRI scanning procedure; andwherein the indication that the MRI scanning procedure has completed comprises at least one of; a transition from an MR-mode of the implantable medical device; information from an MRI detector circuit; and information about a detected fault condition. - View Dependent Claims (9, 10, 11, 12)
-
13. A method comprising:
-
receiving an indication that a magnetic resonance imaging (MRI) scanning procedure has completed; and in response to the MRI scanning procedure completion, automatically testing a cardiac signal sensing of an implantable medical device; and when a physiological change in depolarization amplitude or lead impedance causes a post-MRI scanning procedure loss of cardiac depolarization sensing, adjusting a cardiac signal sensing parameter of the implantable medical device to help re-establish cardiac depolarization sensing. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification