Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2005-09-27
2005-09-27
Schaetzle, Kennedy (Department: 3762)
Surgery
Diagnostic testing
Cardiovascular
C600S518000, C128S923000
Reexamination Certificate
active
06950696
ABSTRACT:
A circuit and method for detecting cardiac rhythm abnormalities employ unipolar signals respectively obtained from a cardiac lead having a tip at which a number of separate electrodes are disposed, the electrodes being simultaneously in contact with cardiac tissue. The respective unipolar signals which are obtained from the multiple electrodes exhibit a time relationship relative to each other, and this time relationship is analyzed to determine whether a cardiac rhythm abnormality is present or one or more of the unipolar signals is compared to a template which is known to represent a cardiac abnormality. Analysis of the time relation is undertaken by determining the absolute value of a time offset between any two of the unipolar signals, or by correlating any two of the unipolar signals.
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Björling Anders
Hedberg Sven-Erik
Lindegren Ulf
Lindgren Anders
Schaetzle Kennedy
Schiff & Hardin LLP
St. Jude Medical AB
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