Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2005-08-30
2005-08-30
Bockelman, Mark (Department: 3762)
Surgery
Diagnostic testing
Cardiovascular
Reexamination Certificate
active
06937888
ABSTRACT:
A signal evaluation method for detecting QRS complexes in electrocardiogram (ECG) signals comprises the following steps:sampling of the ECG signal (4) and conversion into discrete signal values (x(n)) in chronological order;comparing the signal values (xf(n), xfq(n)) to a threshold function (K(n)) adaptively determined therefrom;determining a frequency number (D(n)) within a defined segment of the consecutive signal values, by which signal values (xf(n), xfq(n)) preferably fall short of the threshold function (K(n));comparing the determined frequency number (D(n)) to a defined threshold (Θ), wherein an undershoot of the threshold (Θ) is significant for apresence of a QRS complex (5, 6, 7) in the defined segment of the ECG signal (4).
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Jiapu Pan et al. “A Real-Time QRS Detection Algorithm”, IEEE Transactions on Biomedical Engineering, vol. BME-32, No. 3, Mar. 1985.
G. M. Friesen et al. “A Comparison of the Noise Sensitivity of Nine QRS Detection Alogrithms”, IEEE Transactions on Biomedical Engineering, IEEE Inc. New York, US, Bd. 37, Nr. 1, 1990, Seiten 85-98.
Köhler Bert-Uwe
Orglmeister Reinhold
Biotronik GmbH & Co. KG
Bockelman Mark
Browdy and Neimark , P.L.L.C.
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