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Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments

Morphological changes in pulse rate could provide complementary information to that extracted from the pulse rate variability on the response of the cardiovascular and nervous systems of subjects exposed to hyperbaric environments. The peripheral activation produces a vasoconstriction that increases the pulse width and area. However, the pulse width of the anacrotic phase seems to be a better marker in the variation of peripheral vascular resistance than the pulse width. Pelaez-Coca, M D; Hernando, A; Lozano, M T; Sanchez, C;…

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Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
At the NeoCom 2021 Conference, talking about biomedical signal processing

At the NeoCom 2021 Conference, talking about biomedical signal processing

Jesús Lázaro, researcher of the BSiCoS group of the I3A, at the University of Zaragoza, participated in the Neocom Conference, held this March and organized by the Association of Telecommunications Students of the University of Zaragoza. He spoke about his research work around biomedical signal processing, how it can be used to improve the current understanding of the functioning of biological systems, conditions related to the cardiovascular, respiratory, and autonomic nervous systems, as well as their interactions. In addition, he…

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Characterization of T Wave Amplitude, Duration and Morphology Changes during Hemodialysis: Relationship with Serum Electrolyte Levels and Heart Rate

Chronic kidney disease affects more than 10% of the world population. Changes in serum ion concentrations increase the risk for ventricular arrhythmias and sudden cardiac death, particularly in end stage renal disease (ESRD) patients. We characterized how T wave amplitude, duration and morphology descriptors change with variations in serum levels of potassium and calcium and in heart rate, both in ESRD patients and in simulated ventricular fibers. Electrocardiogram (ECG) recordings from twenty ESRD patients undergoing hemodialysis (HD) and pseudo-ECGs (pECGs)…

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Characterization of T Wave Amplitude, Duration and Morphology Changes during Hemodialysis: Relationship with Serum Electrolyte Levels and Heart Rate
Monitoring Blood Potassium Concentration in Hemodialysis Patients by Quantifying T-wave Morphology Dynamics

Monitoring Blood Potassium Concentration in Hemodialysis Patients by Quantifying T-wave Morphology Dynamics

We investigated the ability of time-warping-based ECG-derived markers of T-wave morphology changes in time (dw) and amplitude (da), as well as their non-linear components (dNLw and dNLa), and the heart rate corrected counterpart (dw,c), to monitor potassium concentration ([K+]) changes (Δ[K+]) in end-stage renal disease (ESRD) patients undergoing hemodialysis (HD). We compared the performance of the proposed time-warping markers, together with other previously proposed [K+] markers, such as T-wave width (Tw) and T-wave slope-to-amplitude ratio (TS/A), when computed from standard…

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Electrocardiogram-Derived Tidal Volume During Treadmill Stress Test

Electrocardiogram (ECG) has been regarded as a source of respiratory information with the main focus in the estimation of the respiratory rate. Although little research concerning the estimation of tidal volume (TV) has been conducted, there are several ECG-derived features that have been related with TV in the literature, such as ECG-derived respiration, heart rate variability or respiratory rate. In this work, we exploited these features for estimating TV using a linear model. 25 young (33.4 ± 5.2 years) healthy male volunteers were recruited for performing…

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Electrocardiogram-Derived Tidal Volume During Treadmill Stress Test
Three of our young researchers participate in the First Conference of the I3A

Three of our young researchers participate in the First Conference of the I3A

The BSiCoS group will be at the I3A Conference, where we will participate in the Young Researchers Meeting: - Pablo Armañac: The capacity of the baroreflex as an identification index of ICU patients prepared for weaning - Cristina Pérez: From the stress test to the prediction of sudden cardiac death using non-invasive markers - Saúl Palacios: Periodic dynamics of repolarization as a predictor of sudden death in patients with chronic heart failure Date: Friday, December 11 Time: 9 am -…

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