Post-shock management of implantable cardiac device features
AssigneeCardiac Pacemakers, Inc.
InventorsDavid J. Yonce, Scott Meyer, David J. Ternes
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Abstract
Systems and methods of managing features or functions of an implantable cardiac device involve forming a baseline evoked response template prior to delivery of defibrillation therapy to a patient's heart, and acquiring a post-shock evoked response signal subsequent to defibrillation therapy delivery. The baseline evoked response template is compared to the post-shock evoked response signal. A determination is made whether to enable, disable or adjust a cardiac device feature based on the comparison. The cardiac device feature may be a therapy feature, a monitoring feature, or a diagnostic feature.
Claims20
An implantable system, comprising:
- electrodes configured to electrically couple to a heart;
- a pulse generator coupled to the electrodes, the pulse generator configured to deliver electrical therapy for the heart;
- a sensing system coupled to the electrodes and configured to sense a cardiac signal associated with delivery of electrical therapy to the heart using the electrodes;
- and
- circuitry configured to manage capture testing, the circuitry configured to acquire a post-therapy evoked response signal subsequent to delivery of a high energy therapy using signals received from the sensing system, compare a baseline evoked response template and the post-therapy evoked response signal, determine whether the high energy therapy rendered myocardial tissue of the heart unstable based on the comparison, and determine whether to enable, disable or adjust capture testing based at least in part on whether the high energy therapy rendered myocardial tissue of the heart unstable.
An implantable system, comprising:
- electrodes configured to electrically couple to a heart;
- a pulse generator coupled to the electrodes, the pulse generator configured to deliver electrical therapy for the heart;
- a sensing system coupled to the electrodes and configured to sense a cardiac signal associated with delivery of electrical therapy to the heart using the electrodes;
- and
- circuitry configured to manage one or more features of the implantable system, the circuitry configured to acquire a post-therapy evoked response signal subsequent to delivery of a high energy therapy using signals received from the sensing system, compare a baseline evoked response template and the post-therapy evoked response signal, determine whether the high energy therapy one or both of stunned and permanently changed myocardial tissue of the heart based on the comparison, disable the one or more features for a period of time that is longer than multiple cardiac cycles if the comparison indicates that the high energy therapy stunned the myocardial tissue, and adjust the one or more features if the comparison indicates that the high energy therapy permanently changed the myocardial tissue.
An implantable system, comprising:
- electrodes configured to electrically couple to a heart;
- a pulse generator coupled to the one or more electrodes, the pulse generator configured to deliver electrical therapy to the heart;
- a sensing system coupled to the one or more electrodes and configured to sense a cardiac signal associated with delivery of electrical therapy to the heart using the electrodes;
- and
- circuitry configured to manage capture testing, the circuitry configured to acquire a post-therapy evoked response signal subsequent to high energy therapy delivery using signals received from the sensing system, compare a baseline evoked response template and the post-therapy evoked response signal, and determine whether to enable, disable or adjust capture testing based on the comparison indicating that the high energy therapy rendered myocardial tissue of the heart unstable.
Dependencies are inferred from the claim text.