Journal ArticleDOI
Online digital filters for biological signals: some fast designs for a small computer.
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TLDR
The possibilities for extending the class of lowpass recursive digital filters to include high pass, bandpass, and bandstop filters are described, and experience with a PDP 11 computer has shown that these filters may be programmed simply using machine code, and that online operation at sampling rates up to about 8 kHz is possible.Abstract:
After reviewing the design of a class of lowpass recursive digital filters having integer multiplier and linear phase characteristics, the possibilities for extending the class to include high pass, bandpass, and bandstop (‘notch’) filters are described. Experience with a PDP 11 computer has shown that these filters may be programmed simply using machine code, and that online operation at sampling rates up to about 8 kHz is possible. The practical application of such filters is illustrated by using a notch desgin to remove mains-frequency interference from an e.c.g. waveform.read more
Citations
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Journal ArticleDOI
A Real-Time QRS Detection Algorithm
Jiapu Pan,Willis J. Tompkins +1 more
TL;DR: A real-time algorithm that reliably recognizes QRS complexes based upon digital analyses of slope, amplitude, and width of ECG signals and automatically adjusts thresholds and parameters periodically to adapt to such ECG changes as QRS morphology and heart rate.
Journal ArticleDOI
Quantitative Investigation of QRS Detection Rules Using the MIT/BIH Arrhythmia Database
TL;DR: This work implemented and tested a final real-time QRS detection algorithm, using the optimized decision rule process, which has a sensitivity of 99.69 percent and positive predictivity of 98.77 percent when evaluated with the MIT/BIH arrhythmia database.
Proceedings ArticleDOI
An open-source algorithm to detect onset of arterial blood pressure pulses
TL;DR: An effective algorithm for detecting the onset of arterial blood pressure (ABP) pulses that employs a windowed and weighted slope sum function (SSF) to extract ABP waveform features and adaptive thresholding and search strategies are applied to the SSF signal.
Journal ArticleDOI
New algorithm for QT interval analysis in 24-hour Holter ECG: performance and applications.
Pablo Laguna,Nitish V. Thakor,Pere Caminal,Raimon Jane,Hyung Ro Yoon,A. Bayés de Luna,V. Marti,Josep Guindo +7 more
Journal ArticleDOI
Removal of power-line interference from the ECG: a review of the subtraction procedure
TL;DR: The subtraction procedure has largely proved advantageous over other methods for power-line interference cancellation in ECG signals and has been used in thousands of ECG instruments and computer-aided systems.
References
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Journal ArticleDOI
Recursive digital filters for biological signals
TL;DR: Two classes of recursive digital filter of particular value for the processing of biological signals are described in some detail, applied to the recovery of an ECG waveform from wide- and narrowband contaminating noise.
Journal ArticleDOI
Digital filtering with applications to electrocardiogram processing
TL;DR: The design of low-pass, bandpass, high- pass, and notched filter difference equations using Z-transform techniques and applications of these filters to the processing of electrocardiograms.
Journal ArticleDOI
Fast Fourier transform in the analysis of biomedical data.
TL;DR: Some of the important features of the fast Fourier transform which are relevant to its increasing application to biomedical data are reviewed and a distinction is made between the power spectrum of ergodic signals, computed from the autocorrelation function, and the frequency spectrum of nonstationary biomedical signals.