Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2005-12-29
2009-11-24
Manuel, George (Department: 3762)
Surgery
Diagnostic testing
Cardiovascular
Reexamination Certificate
active
07623911
ABSTRACT:
A method and apparatus for detecting atrial arrhythmias and discriminating atrial fibrillation (AF) and organized atrial tachycardia (OAT) that includes defining a threshold detection criteria for a cluster signature evidence metric corresponding to a Lorenz distribution of ventricular cycle lengths representative of AF or OAT. Using a signal containing VCL information, a number of consecutive ventricular cycle lengths are determined during a selected time interval for generating a one-dimensional or a two-dimensional histogram as a numerical representation of a Lorenz plot of VCLs. A number of cluster signature metrics are computed using the stored ventricular cycle length information, and a cluster signature evidence metric is computed from the cluster signature metrics. AF or OAT is detected if a comparative analysis of a corresponding cluster signature evidence metric meets a respective threshold detection criteria.
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Ritscher David E.
Sarkar Shantanu
Manuel George
Medtronic Inc.
Soldner Michael C.
Wieland Robert N
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