Surgery – Diagnostic testing – Cardiovascular
Patent
1995-12-28
1998-07-07
Getzow, Scott M.
Surgery
Diagnostic testing
Cardiovascular
600521, A61B 5046
Patent
active
057760721
ABSTRACT:
A method and system for discriminating atrial and ventricular signal components from a single heart lead, and for using this information for identifying an arrhythmia condition as being atrial or ventricular in origin. The invention is effective in identifying P waves occurring in complex signal which includes relatively stronger R waves or other ventricular artifacts which mask the P waves. The contribution of the R wave signal to the complex signal is obtained by filtering, time windowing and transfer function estimation, then the R wave estimate is subtracted from the combined signal to leave the P wave. The ratio of P waves to R waves, P--P and R--R intervals, and their ratios to one another and to fixed values can be estimated, and used in a comparison to discriminate between atrial and ventricular arrhythmia, to thereby enable appropriate treatment.
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Carlson Gerrard M.
Hsu William
Warren Jay A.
Cardiac Pacemakers Inc.
Getzow Scott M.
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