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Recent Submissions
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Relationship between sleep stages and HRV response in obstructive sleep apnea patients
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Conference report
Open AccessPatients suffering from obstructive sleep apnea (OSA) usually present an increased sympathetic activity caused by the intermittent hypoxia effect on autonomic control. This study evaluated the relationship between sleep ... -
Detection of respiratory phases to estimate breathing pattern parameters using wearable bioimpendace
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Conference lecture
Open AccessMany studies have focused on novel noninvasive techniques to monitor respiratory rate such as bioimpedance. We propose an algorithm to detect respiratory phases using wearable bioimpedance to compute time parameters like ... -
Sleep apnea & chronic obstructive pulmonary disease: overlap syndrome dynamics in patients from an epidemiological study
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Conference report
Open AccessObstructive sleep apnea (OSA) is a sleep disorder in which repetitive upper airway obstructive events occur during sleep. These events can induce hypoxia, which is a risk factor for multiple cardiovascular and cerebrovascular ... -
Assessment of the non-linear response of the fSampEn on simulated EMG signals
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Conference report
Open AccessFixed sample entropy (fSampEn) is a promising technique for the analysis of respiratory electromyographic (EMG) signals. Its use has shown outperformance of amplitude-based estimators such as the root mean square (RMS) in ... -
Relationship Between Heart Rate Recovery and Disease Severity in Chronic Obstructive Pulmonary Disease Patients
(2020)
Conference lecture
Open AccessChronic obstructive pulmonary disease (COPD) patients exhibit impaired autonomic control which can be assessed by heart rate variability analysis. The study aims to evaluate the cardiac autonomic responses of COPD patients ... -
Spatial distribution of normal lung sounds in healthy individuals under varied inspiratory load and flow conditions
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Conference report
Open AccessRespiratory sounds yield pertinent information about respiratory function in both health and disease. Normal lung sound intensity is a characteristic that correlates well with airflow and it can therefore be used to quantify ... -
Performance evaluation of fixed sample entropy for lung sound intensity estimation
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Conference report
Open Accessung sound (LS) signals are often contaminated by impulsive artifacts that complicate the estimation of lung sound intensity (LSI) using conventional amplitude estimators. Fixed sample entropy (fSampEn) has proven to be ... -
Cardiac comorbidities in COPD patients explained through HRV analysis and respiratory indices
(2020)
Conference lecture
Open AccessChronic obstructive pulmonary disease (COPD) patients exhibit depressed heart rate variability (HRV), while comorbidities may worsen the patients’ prognosis. We investigated whether HRV analyis, clinical markers of disease ... -
Neural respiratory drive estimation in respiratory sEMG with cardiac arrhythmias
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Conference report
Open AccessNeural respiratory drive as measured by the electromyography allows the study of the imbalance between the load on respiratory muscles and its capacity. Surface respiratory electromyography (sEMG) is a non-invasive tool ... -
Hypoxia-induced effects on ECG depolarization by time warping analysis during recurrent obstructive apnea
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Conference report
Open Accessthis work, we evaluated a non-linear approach to estimate morphological variations in ECG depolarization, in the context of intermittent hypoxia (IH). Obstructive apnea sequences were provoked for 15 minutes in anesthetized ... -
Cardiovascular coupling-based classification of ischemic and dilated cardiomyopathy patients
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference lecture
Open AccessCardiovascular diseases are one of the most common causes of death in elderly patients. The etiology of cardiomyopathies is difficult to discern clinically. The objective of this study was to classify cardiomyopathy patients ... -
Linear mixed effects modelling of oxygen desaturation after sleep apneas and hypopneas: a pilot study
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference lecture
Restricted access - publisher's policyObstructive Sleep Apnea severity is commonly determined after a sleep polysomnographic study by the Apnea-Hypopnea Index (AHI). This index does not contain information about the duration of events, and weights apneas and ...
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