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
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This article is published in Medical & Biological Engineering & Computing.The article was published on 1990-01-01. It has received 238 citations till now. The article focuses on the topics: QT interval.read more
Citations
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Journal ArticleDOI
Beat-to-Beat QT Interval Variability: Novel Evidence for Repolarization Lability in Ischemic and Nonischemic Dilated Cardiomyopathy
Ronald D. Berger,Edward K. Kasper,Kenneth L. Baughman,Eduardo Marbán,Hugh Calkins,Gordon F. Tomaselli +5 more
TL;DR: DCM is associated with beat-to-beat fluctuations in QT interval that are larger than normal and uncoupled from variations in heart rate, which indicates that DCM leads to temporal lability in ventricular repolarization.
Journal ArticleDOI
The weighted diagnostic distortion (WDD) measure for ECG signal compression
TL;DR: The correlation between the proposed WDD measure and the MOS test measure (MOS/sub error/) was found superior to the correlation betweenThe popular PRD measure andThe MOS/ sub error/.
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Diurnal pattern of QTc interval: How long is prolonged?: Possible relation to circadian triggers of cardiovascular events
TL;DR: The maximal QTc interval over 24 h in normal subjects is longer than heretofore thought and has implications regarding the definition of QT prolongation and its use in predicting arrhythmias and sudden death.
Journal ArticleDOI
Spatial, temporal and wavefront direction characteristics of 12-lead T-wave morphology
TL;DR: The results show that the new parameters do not correlate with the conventional QT interval-related descriptors, are generally more reproducible than the conventional parameters, and lead to a more significant separation between normal and abnormal ECGs, both univariately and in multivariate regression models.
Journal ArticleDOI
Characteristic wave detection in ECG signal using morphological transform
TL;DR: It was demonstrated through experiments that the Q wave, R peak, S wave, the onsets and offsets of the P wave and T wave could be reliably detected in the multiscale space by the MMD detector.
References
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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 Article
An analysis of the time-relations of electrocardiograms
TL;DR: In this paper, a preliminary attempt was made to determine from blood pressure records the relative influence of the heart action and of vaso-canstriction, and it was suggested that it might be necessary to estimate the duration of ventricular systole for different heart rates.
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QT interval prolongation as predictor of sudden death in patients with myocardial infarction.
Peter J. Schwartz,S Wolf +1 more
TL;DR: It is concluded that a constant prolongation of QTc in patients with myocardial infarction may help, with other risk factors, in defining a subgroup at higher risk for sudden death.
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Delineation of the QRS complex using the envelope of the e.c.g.
M. E. Nygårds,Leif Sörnmo +1 more
TL;DR: A new algorithm for QRS delineation has been developed and the stability of the method is demonstrated for transitions between different waveform morphologies.
Journal ArticleDOI
Online digital filters for biological signals: some fast designs for a small computer.
TL;DR: 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.