Cardiac Response Classification Using Retriggerable Classification Windows

• US 20100256703A1
• Filed: 06/17/2010
• Published: 10/07/2010
• Est. Priority Date: 12/12/2003
• Status: Active Grant

• Current Assignee: Doug Birholz, Jeremy Maniak, John Voegele, Scott A. Meyers, Yanting Dong
• Original Assignee: Doug Birholz, Jeremy Maniak, John Voegele, Scott A. Meyers, Yanting Dong
• Inventors: Voegele, John, Birholz, Doug, Meyer, Scott A., Dong, Yanting, Maniak, Jeremy
• Granted Patent: US 9,993,205 B2
• Time in Patent Office: Days
• US Class Current: 607/28
• CPC Class Codes: A61B 5/35 by template matching
• CPC Class Codes: A61B 5/7217 of noise originating from a therapeutic or surgical apparatus, e.g. from a pacemaker
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: A61N 1/371 Capture, i.e. successful stimulation
• CPC Class Codes: G16H 50/20 for computer-aided diagnosis, e.g. based on medical expert systems

Abstract

Methods and devices for classifying a cardiac response to pacing involve establishing a retriggerable cardiac response classification window. A first cardiac response classification window is established subsequent to delivery of a pacing pulse. A cardiac signal following the pacing stimulation is sensed in the first classification window. A second cardiac response classification may be triggered if a trigger characteristic is detected in the first classification window. The cardiac signal is sensed in the second classification window if the second classification window is established. The cardiac response to the pacing stimulation is determined based on characteristics of the cardiac signal. The cardiac response may be determined to be one of a captured response, a non-captured response, a non-captured response added to an intrinsic beat, and a fusion/pseudofusion beat, for example.

Claims

1. A method of classifying a cardiac response to a pacing stimulation, comprising:

delivering the pacing stimulation to a heart;

sensing a cardiac signal following delivery of the pacing stimulation;

detecting a first peak of the cardiac signal within a first capture detection region;

in response to detecting the first peak of the cardiac signal within the first capture detection region, continuing to evaluate a portion of the cardiac signal that occurs after the first peak, including determining if the portion of the cardiac signal that occurs after the first peak is consistent with capture;

classifying the cardiac response to the pacing stimulation as a captured response if the first peak of the cardiac signal is detected within the first capture detection region and if the portion of the cardiac signal that occurs after the first peak is consistent with capture; and

delivering pacing therapy based on classification of the cardiac response to the pacing stimulation.