Systems and methods of characterizing mechanical activation patterns for rhythm discrimination and therapy

摘要

An implantable sensor circuit can be configured to generate a first sensor signal representative of mechanical activation of a first chamber of a heart of a subject and a second sensor signal representative of mechanical activation of a second chamber of the heart. A chamber synchrony measurement circuit can be configured to generate a measure of synchrony of the mechanical activations of the first heart chamber and the second heart chamber using the first and second sensor signals, a tachyarrhythmia detector circuit, and a control circuit. The control circuit can be configured to receive an indication of a detected episode of tachyarrhythmia, and to initiate, select, or adjust a device-based therapy at least in part using the measure of synchrony of the mechanical activations in response to the tachyarrhythmia detection.

主权项

1. An apparatus comprising:
an implantable sensor circuit configured to generate a first sensor signal, different from an intrinsic electrical cardiac signal, representative of mechanical activation of a first chamber of a heart of a subject and a second sensor signal, also different from an intrinsic electrical cardiac signal, representative of mechanical activation of a second chamber of the heart; a chamber synchrony measurement circuit configured to generate a measure of synchrony of the mechanical activations of the first heart chamber and the second heart chamber using the first and second sensor signals; a tachyarrhythmia detector circuit configured to detect tachyarrhythmia using a sensed intrinsic electrical cardiac signal; and a control circuit communicatively coupled to implantable sensor circuit, the chamber synchrony measurement circuit, and the tachyarrhythmia detector circuit, wherein the control circuit is configured to:
receive an indication of an episode of tachyarrhythmia detected using the sensed intrinsic electrical cardiac signal;classify the episode as supraventricular tachyarrhythmia (SVT) or ventricular tachyarrhythmia (VT) according to the measure of synchrony of the mechanical activations in response to the tachyarrhythmia detection; andinitiate or adjust a device-based therapy at least in part using the tachyarrhythmia classification.