Cardiac Waveform Template Creation, Maintenance and Use

• US 20090105778A1
• Filed: 12/22/2008
• Published: 04/23/2009
• Est. Priority Date: 05/28/2003
• Status: Active Grant

• Current Assignee: Kent Lee, Rob Sweeney
• Original Assignee: Kent Lee, Rob Sweeney
• Inventors: Lee, Kent, Sweeney, Rob
• Granted Patent: US 8,606,357 B2
• Time in Patent Office: Days
• US Class Current: 607/17
• CPC Class Codes: A61B 5/35 by template matching
• 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

Abstract

The present disclosure describes methods and systems for creating, adjusting, and using cardiac waveform morphology templates. The morphology templates include target regions associated with features of cardiac waveforms. The target regions may be adjusted based on relationships between the target regions and features of detected cardiac waveforms associated with the target regions. The templates may be used to analyze cardiac waveforms to classify or monitor various waveform morphologies. Templates may be created or eliminated based on a frequency of use. According to one approach, template creation involves providing target regions defined by one or more characteristics. The target regions are adjusted based on detected cardiac waveform features having similar characteristics. A template may be created using the target regions adjusted by this process.

Claims

1. A method of determining a cardiac pacing response to a cardiac pacing pulse, comprising:

delivering the pacing pulse during a cardiac cycle

detecting a cardiac waveform after delivery of the pacing pulse during the cardiac cycle;

determining if one or more features of the cardiac waveform fall within one or more target regions, respectively, each target region having at least a time dimension and an amplitude dimension; and

determining the cardiac pacing response based on whether the cardiac waveform features fall within the target regions; and

generating an output indicating the cardiac pacing response.