Method and System for Characterizing a Representative Cardiac Beat Using Multiple Templates

• US 20090222054A1
• Filed: 05/05/2009
• Published: 09/03/2009
• Est. Priority Date: 03/25/2002
• Status: Active Grant

• Current Assignee: Jaeho Kim, Joseph Bocek
• Original Assignee: Jaeho Kim, Joseph Bocek
• Inventors: Bocek, Joseph, Kim, Jaeho
• Granted Patent: US 8,121,674 B2
• Time in Patent Office: Days
• US Class Current: 607/17
• CPC Class Codes: A61B 5/35 by template matching
• CPC Class Codes: A61N 1/3622 comprising two or more electrodes co-operating with different heart regions

Abstract

The present invention provides a method and system for characterizing one beat of a patient'"'"'s supraventricular rhythm. A plurality of templates is provided and updated using a plurality of qualified beats. Updating occurs by temporally aligning the shock channel waveforms of the template beats using rate channel fiducial points. The template beats are combined by point-by-point addition of the shock channel waveforms. The resultant updated template characterizes one of the patient'"'"'s supraventricular conducted cardiac beats.

Claims

1. A method of characterizing a patient'"'"'s cardiac rhythm in an implantable device, comprising:

detecting a plurality of cardiac beats;

for each cardiac beat of the plurality of cardiac beats, updating one of a plurality of cardiac rhythm templates using the cardiac beat;

determining a number of updates made to each of the plurality of templates;

identifying a particular template as representative of the cardiac rhythm based on the number of updates made to the particular template;

detecting one or more subsequent cardiac beats;

comparing the one or more subsequent cardiac beats to the particular template;

detecting an arrhythmia episode based on comparison of the one or more subsequent cardiac beats to the particular template; and

delivering a therapy in response to detection of the arrhythmia episode.

2. The method of claim 1, wherein delivering the therapy comprises delivering a cardiac electrical stimulation therapy.

3. The method of claim 1, wherein delivering the therapy comprises titrating a drug therapy.