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Parallel complexity of householder QR factorization
1996Gaussian Elimination with Partial Pivoting and Householder QR factorization are two very popular methods to solve linear systems. Implementations of these two methods are provided in state-of-the-art numerical libraries and packages, such as LAPACK and MATLAB. Gaussian Elimination with Partial Pivoting was already known to be P-complete.
Leoncini Mauro +2 more
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Detection of the QRS complex by linear prediction
Journal of Medical Engineering & Technology, 2006The electrocardiogram (ECG) represents the electrical activity of the heart. It is characterized by its recurrent or periodic behaviour with each beat. Each recurrence is composed of a wave sequence consisting of P, QRS and T-waves, where the most characteristic wave set is the QRS complex. In this paper, we have developed an algorithm for detection of
F. Bereksi Reguig, Z. E. Hadj Slimane
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QRS complex based human identification
2015 IEEE International Conference on Signal and Image Processing Applications (ICSIPA), 2015In the last years, the electrocardiogram signal has become an important biometric modality due essentially to the physiological or/and behavioral characteristics variation of the heart among different individuals. The aim of this paper is to present a human identification approach using some time and frequency features of the QRS complex of the ECG ...
Assadi, I. +4 more
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2017 12th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2017
Thanks to the Electrocardiography (ECG) signal and its features, some serious heart diseases can be diagnosed and treated at the early stage. In this paper, we focus on the detecting QRS complex of ECG, more specifically, the R wave. While Pan — Tompkins's algorithm effectively extracts R peak, our new algorithm bases on Pan – Tompkins's model giving ...
Long Duc Tran +3 more
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Thanks to the Electrocardiography (ECG) signal and its features, some serious heart diseases can be diagnosed and treated at the early stage. In this paper, we focus on the detecting QRS complex of ECG, more specifically, the R wave. While Pan — Tompkins's algorithm effectively extracts R peak, our new algorithm bases on Pan – Tompkins's model giving ...
Long Duc Tran +3 more
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General Approach to a Wide QRS Complex
Cardiac Electrophysiology Clinics, 2017Wide QRS complex is present when the normal activation pattern is modified by various mechanisms and clinical conditions. Correct interpretation is crucial for appropriate decision making. When approaching an electrocardiogram (ECG) with wide complex tachycardia, one must differentiate between ventricular tachycardia and supraventricular tachycardia ...
Giuseppe Bagliani +3 more
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Complexity of parallel QR factorization
Journal of the ACM, 1986An optimal algorithm to perform the parallel QR decomposition of a dense matrix of size N is proposed. It is deduced that the complexity of such a decomposition is asymptotically 2 N , when an unlimited number of processors is available.
Cosnard, Michel, Robert, Yves
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2015
VT is a tachycardia that rises from the ventricles and may be a life-threatenig condition. ECG have a key role for the differential diagnosis and therapy of wide-complex tachycardias. We reported a case of 72-year-old man admitted to the ER for palpitations, fatigue, and dyspnea.
Alessandro Barbarossa +2 more
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VT is a tachycardia that rises from the ventricles and may be a life-threatenig condition. ECG have a key role for the differential diagnosis and therapy of wide-complex tachycardias. We reported a case of 72-year-old man admitted to the ER for palpitations, fatigue, and dyspnea.
Alessandro Barbarossa +2 more
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An analysis of the QRS complex of the electrocardiogram
American Heart Journal, 1932Abstract 1. 1. In ventricular preponderance, the deviation of the electrical axis is probably an effect of the greater potential differences generated by the wall of the more hypertrophied ventricle. 2. 2. The principal initial ventricular deflections of bundle-branch block represent the unopposed potential differences of delayed activation ...
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