Surgery – Truss – Pad
Patent
1990-07-13
1993-05-18
Howell, Kyle L.
Surgery
Truss
Pad
36441306, A61B 50452
Patent
active
052111792
ABSTRACT:
Disclosed is a system and a method for computer-supported analysis of arrhythmic potentials in ECG signals, particularly those of late potentials. Interference discrimination advantages of frequency domain analysis are combined with temporal localization advantages of time domain analysis to determine the accurate location of arrhythmic potentials. Several small signal segments are selected in an ECG waveform. A determination is made of parameters corresponding to extended signals which closely match fluctuations of each respective small signal, allowing more information is discerned about the small signals than is possible with more conventional techniques. A comparison is made with respect to extended signals rather than small signals. Two autoregressive models are used, the maximum entropy method and adaptive filter determination. Area integrals of the frequency characteristics of small signal segments are recorded successively with respect to the frequency range of the arrhythmic potentials analyzed. The area integrals for first segments are calculated, then the remaining area integrals are calculated to determine the spectral manifestation of the selected signal region. A normality factor is determined as quotient of the summed area integrals of the first and second number of time segments analyzed.
REFERENCES:
patent: 4422459 (1983-12-01), Simson
patent: 4458692 (1984-07-01), Simson
patent: 4616659 (1986-10-01), Prezas et al.
patent: 4947857 (1990-08-01), Albert et al.
Yamaguchi, T., et al., "Simulation of nonstationary spectral analysis of turbulence in the aorta using a modified autoregressive or maximum entropy (AR/ME) method", Medical & Biol. Eng. & Comput., vol. 25, pp. 553-542 (No. 5 Sep. 1987).
Berbari, E. J., et al., "Methods for Analyzing Cardiac Late Potentials", Computers in Cardiology, pp. 35-40 (IEEE Computer Soc., Oct. 7-10, 1986).
Nikias, C. L., et al., "A New Robust 2-D Spectral Estimation Method and Its Application in Cardiac Data Analysis", ICASSP 82, vol. 2, pp. 729-732 (IEEE Ac. Sp. & Sig. Proc. Soc., May 3-5, 1982).
Haberl, R., "Frequency Analysis of the 4 ECG with Maximum Entropy Method (MEM) versus Fast Fourier Transform (FFT) for Identification of Patients With Ventricular Tachycardia", Circulation, vol. 76, Supp. IV, p. IV-82 (Oct. 1987).
Haberl, R., et al., "Comparison of Frequency and Time Domain Analysis of the Signal-Averaged Electrocardiogram in Patients With Ventricular Tachycardia and Coronary Artery Disease: Methodologic Validation and Clinical Revelance", JACC vol. 12, pp. 150-158 (No. 1, Jul. 1988).
Haberl, et al., "Spectral mapping of electrocardiogram with Fourier transform for identification of patients with sustained ventricular tachycardia and coronary artery disease," European Heart Journal, vol. 10, pp. 3161.varies.322 (1989).
Cain, M. E., et al., "Fast-Fourier transform analysis of signal-averaged electrocardiograms for identification of patients prone to sustained ventricular tachycardia", Circulation, vol. 69, pp 711-720, (No. 4, Apr. 1984).
Cain, M. E. et al., "quantificaton of Differences in Frequency Content of Signal-Averaged Electrocardiograms in Patients with Compared to Those Without Sustained Ventricular Tachycardia", Am. J. Cardiol., vol. 55, pp. 1500-1505 (Jun. 1, 1985).
Childers, D. G., Ed., Modern Spectrum Analysis, pp. 496 to 498 (IEEE Press, N.Y., 1978). (Explanation of "Burg's Method.").
Friedlander, Benjamin, "System Identification Techniques for Adaptive Noise Cancelling," IEEE Trans. on Acc., Sp., & Sig. Proc., vol. ASSP+, No. 5, pp. 699-709 (No. 5, Oct. 1982).
Papoulis, A., Probability, Random Variables, and Stochastic Processes, pp. 496-498 (McGraw-Hill, 2nd Ed., 1984).
Kalouptsidis, N., et al., "Fast Adaptive Least Squares Algorithms for Power Spectral Estimation," IEEE Transactions on Ac. Sp. & Sig. Proc., vol. ASSP-35, pp. 661-670 (No. 5, May 1987).
Marple, Larry, "A New Autoregressive Spectrum Analysis Algorithm," Transactions of Acc. Sp., & Sig. Proc., vol. ASSP-28, pp. 441-453 (IEEE, No. 4, Aug. 1980).
Broersen, P. M. T., "Selecting the Order of Autoregressive Models from Small Samples," IEEE Transactions on Ac., Sp., & Sign. Proc., vol. ASSP-33, pp. 874-879 (No. 4, Aug. 1985).
Akaike, Hirotugu, "Statistical Predictor Indentification", published on pp. 203-217 of some publication (possible Ann. Inst. Statist. Math, possibly vol. 22 or 23, sometime soon after Dec. 26, 1969, the submission date).
Haberl Ralph
Schels Hans F.
Howell Kyle L.
Schaetzle Kennedy J.
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