Characterization of dynamic interactions between cardiovascular signals by time-frequency coherence

M Orini, R Bailón, LT Mainardi… - IEEE transactions on …, 2011 - ieeexplore.ieee.org
An assessment of the dynamic interactions between cardiovascular signals can provide
valuable information to improve the understanding of cardiovascular control. In this study …

Periodic repolarization dynamics as predictor of risk for sudden cardiac death in chronic heart failure patients

S Palacios, I Cygankiewicz, A Bayés de Luna… - Scientific Reports, 2021 - nature.com
The two most common modes of death among chronic heart failure (CHF) patients are
sudden cardiac death (SCD) and pump failure death (PFD). Periodic repolarization …

Electrocardiogram derived respiratory rate from QRS slopes and R-wave angle

J Lázaro, A Alcaine, D Romero, E Gil, P Laguna… - Annals of biomedical …, 2014 - Springer
A method for estimating respiratory rate from electrocardiogram (ECG) signals is presented.
It is based on QRS slopes and R-wave angle, which reflect respiration-induced beat …

Variability of ventricular repolarization dispersion quantified by time-war** the morphology of the T-waves

J Ramirez, M Orini, JD Tucker, E Pueyo… - IEEE Transactions on …, 2016 - ieeexplore.ieee.org
Objective: We propose two electrocardiogram (ECG)-derived markers of T-wave
morphological variability in the temporal, d ω, and amplitude, d α, domains. Two additional …

Two-dimensional war** for one-dimensional signals—conceptual framework and application to ECG processing

M Schmidt, M Baumert, A Porta… - IEEE Transactions …, 2014 - ieeexplore.ieee.org
We propose a novel method for evaluating the similarity between two 1d patterns. Our
method, referred to as two-dimensional signal war** (2DSW), extends the basic ideas of …

T‐wave morphology restitution predicts sudden cardiac death in patients with chronic heart failure

J Ramírez, M Orini, A Mincholé… - Journal of the …, 2017 - ahajournals.org
Background Patients with chronic heart failure are at high risk of sudden cardiac death
(SCD). Increased dispersion of repolarization restitution has been associated with SCD, and …

Techniques for ventricular repolarization instability assessment from the ECG

P Laguna, JPM Cortés, E Pueyo - Proceedings of the IEEE, 2016 - ieeexplore.ieee.org
Instabilities in ventricular repolarization have been documented to be tightly linked to
arrhythmia vulnerability. Translation of the information contained in the repolarization phase …

Weightlessness and cardiac rhythm disorders: current knowledge from space flight and bed-rest studies

EG Caiani, A Martin-Yebra, F Landreani… - Frontiers in Astronomy …, 2016 - frontiersin.org
Isolated episodes of heart rhythm disorders have been reported during 40 years of space
flight, triggering research to evaluate the risk of develo** life-threatening arrhythmias …

Automatic SVM classification of sudden cardiac death and pump failure death from autonomic and repolarization ECG markers

J Ramírez, V Monasterio, A Mincholé… - Journal of …, 2015 - Elsevier
Background Considering the rates of sudden cardiac death (SCD) and pump failure death
(PFD) in chronic heart failure (CHF) patients and the cost-effectiveness of their preventing …

Categorization and theoretical comparison of quantitative methods for assessing QT/RR hysteresis

H Gravel, D Curnier, N Dahdah… - Annals of Noninvasive …, 2017 - Wiley Online Library
Background In the human electrocardiogram, there is a lag of adaptation of the QT interval to
heart rate changes, usually termed QT/RR hysteresis (QT‐hys). Subject‐specific quantifiers …