Cardiac rhythm template generation system and method

• US 20040176694A1
• Filed: 03/16/2004
• Published: 09/09/2004
• Est. Priority Date: 04/30/2001
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Bocek, Joseph, Kim, Jaeho, White, Harley, Hsu, William
• Granted Patent: US 7,354,404 B2
• Time in Patent Office: Days
• US Class Current: 600/510
• CPC Class Codes: A61B 5/35 by template matching

Abstract

A method and system provides for generating a snapshot representative of one beat of a patient'"'"'s normal cardiac rhythm. Cardiac rate channel signals and shock channel signals are sensed. A fiducial point is determined for a predefined number of the cardiac rate channel signals. A predefined number of the shock channel signals are aligned using the fiducial point. A template is generated using the aligned shock channel signals, whereby the template is representative of one of the patient'"'"'s normal supra-ventricular conducted cardiac beats. The template is updated on a periodic basis.

Claims

1. A method, comprising:

sensing rate and shock channel signals;

aligning the shock channel signals using a feature of the rate channel signals;

generating a candidate template using the aligned shock channel signals;

storing the candidate template if a current cardiac rhythm correlates with the candidate template; and

retaining a previously stored template or not storing the candidate template if the current cardiac rhythm fails to correlate with the candidate template.