Wojciech Trzépizur

ORCID: 0000-0003-0426-3273
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About
Contact & Profiles
Research Areas
  • Obstructive Sleep Apnea Research
  • Neuroscience of respiration and sleep
  • Sleep and related disorders
  • Sleep and Wakefulness Research
  • Cardiovascular and Diving-Related Complications
  • Respiratory Support and Mechanisms
  • Extracellular vesicles in disease
  • Chronic Obstructive Pulmonary Disease (COPD) Research
  • Cardiovascular Syncope and Autonomic Disorders
  • Cardiovascular Health and Disease Prevention
  • High Altitude and Hypoxia
  • Tracheal and airway disorders
  • Adipose Tissue and Metabolism
  • Non-Invasive Vital Sign Monitoring
  • Heart Rate Variability and Autonomic Control
  • Cardiovascular Disease and Adiposity
  • Dysphagia Assessment and Management
  • Liver Disease Diagnosis and Treatment
  • Airway Management and Intubation Techniques
  • Inflammatory Biomarkers in Disease Prognosis
  • Thermoregulation and physiological responses
  • Blood Pressure and Hypertension Studies
  • Venous Thromboembolism Diagnosis and Management
  • COVID-19 Clinical Research Studies
  • Gastroesophageal reflux and treatments

Université d'Angers
2016-2025

Inserm
2016-2025

Centre Hospitalier Universitaire d'Angers
2016-2025

Centre National de la Recherche Scientifique
2008-2025

Laboratoire Stress Oxydant et Pathologies Métaboliques
2009-2021

SleepMed
2021

Université Bretagne Loire
2016-2020

Trialog (France)
2020

University of Chicago
2016-2017

Université Nantes Angers Le Mans
2012-2013

The aim of this study was to compare mandibular advancement device (MAd) therapy and continuous positive airway pressure (CPAP) for obstructive sleep apnoea/hypopnoea syndrome (OSAHS) after one-night polysomnographic (PSG) titration both treatments. 59 OSAHS patients (apnoea/hypopnoea index (AHI): 34+/-13 events x h(-1); Epworth scale: 10.6+/-4.5) were included in a crossover trial 8 weeks MAd CPAP effective titration. Outcome measurements home study, sleepiness, health-related quality life...

10.1183/09031936.00148208 article EN European Respiratory Journal 2009-03-26

Rationale: Randomized controlled trials showed no effect of positive airway pressure (PAP) therapy for obstructive sleep apnea (OSA) on cardiovascular (CV) risk. However, patient selection and low PAP adherence preclude the generalization their data to clinical samples. Objectives: To evaluate association between hours use, mortality, CV morbidity in real-life conditions. Methods: Data from Pays de la Loire Cohort were linked health administrative identify incident major adverse events...

10.1164/rccm.202202-0366oc article EN American Journal of Respiratory and Critical Care Medicine 2022-07-11

Abstract Background With the lack of effective therapy, chemoprevention, and vaccination against SARS-CoV-2, focusing on immediate repurposing existing drugs gives hope curbing COVID-19 pandemic. A recent unbiased genomics-guided tracing SARS-CoV-2 targets in human cells identified vitamin D among three top-scoring molecules manifesting potential infection mitigation patterns. Growing pre-clinical epidemiological observational data support this assumption. We hypothesized that...

10.1186/s13063-020-04928-5 article EN cc-by Trials 2020-12-28

Rationale: Data from population-based cohorts suggest that symptom subtypes and obstructive sleep apnea (OSA)-specific hypoxic burden (HB) could help to better identify patients with OSA at high cardiovascular (CV) risk. Objectives: We aimed evaluate whether those new markers are associated the risk of major adverse CV events (MACE) in clinical setting. Methods: Pays de la Loire cohort were linked health administrative data occurrence MACE (a composite outcome including all-cause mortality,...

10.1164/rccm.202105-1274oc article EN American Journal of Respiratory and Critical Care Medicine 2021-10-15

The increasing number of patients requiring home noninvasive ventilation (HNIV) is a challenge for our healthcare system. Telemonitoring may be used to facilitate the management HNIV patients. We aimed assess ability telemonitoring algorithms identify not adequately ventilated. Our secondary aim was consequences related these algorithms, including costs. 11 experts each provided an algorithm with suboptimal ventilation. Each tested using real-life data from cohort over 90-day period....

10.1183/23120541.00509-2024 article EN cc-by-nc ERJ Open Research 2025-02-20

Rationale: Nocturnal hypoxemia and sympathetic/parasympathetic imbalance might contribute to the occurrence or atrial fibrillation (AF) in patients with obstructive sleep apnea (OSA). During recordings, pulse rate variability (PRV) derived from oximetry provide an accurate estimation of heart variability, which reflects autonomic cardiovascular control. Objectives: We aimed evaluate whether indices oxygen desaturation PRV nocturnal were associated AF incidence investigated for OSA. Methods:...

10.1513/annalsats.202009-1202oc article EN Annals of the American Thoracic Society 2021-01-12

Rationale: Endothelial dysfunction, a major predictor of late cardiovascular events, is linked to the severity obstructive sleep apnea (OSA).Objectives: To determine whether treatment with mandibular advancement device, main alternative continuous positive airway pressure, improves endothelial function in patients severe OSA.Methods: In this trial, we randomized OSA and no overt disease receive 2 months either effective device or sham device. The primary outcome, change reactive hyperemia...

10.1164/rccm.201609-1817oc article EN American Journal of Respiratory and Critical Care Medicine 2017-03-06

Chronic sleep fragmentation (SF) increases cancer aggressiveness in mice. Exosomes exhibit pleiotropic biological functions, including immune regulatory antigen presentation, intracellular communication and inter-cellular transfer of RNA proteins. We hypothesized that SF-induced alterations biosynthesis cargo plasma exosomes may affect tumor cell properties.SF-derived increased proliferation (~13%), migration (~2.3-fold) extravasation (~10%) when compared to from SC-exposed Similarly, Pre...

10.18632/oncotarget.10578 article EN Oncotarget 2016-07-13

ABSTRACT Background and objective Average volume‐assured pressure support—automated expiratory positive airway (AVAPS‐AE) combines an automated to maintain upper patency support with a targeted tidal volume. The aim of this study was compare the effects 2‐month AVAPS‐AE ventilation versus (ST) on sleep quality in stable patients OHS. Secondary outcomes included arterial blood gases, health‐related life, daytime sleepiness, subjective compliance NIV. Methods This is prospective multicentric...

10.1111/resp.13784 article EN Respirology 2020-02-13

Using signal processing measures we evaluate the effect of aging on peripheral cardiovascular system. Laser Doppler flowmetry (LDF) signals, reflecting microvascular perfusion, are recorded forearm 27 healthy subjects between 20-30, 40-50, or 60-70 years old. Wavelet-based representations, Hölder exponents, and sample entropy values computed for each time series. The results indicate a possible modification system with aging. Thus, endothelial-related metabolic activity decreases, but not...

10.1118/1.2831909 article EN Medical Physics 2008-01-29

To assess, in a large cohort of patients with obstructive sleep apnea, the factors that are independently associated positional apnea (POSA) and exclusive POSA (e-POSA) determine their prevalence. The secondary objective was to evaluate outcome positive airway pressure (PAP) therapy for e-POSA.This retrospective study included 6,437 typical mild-to-severe OSA from Pays de la Loire cohort. Patients e-POSA were compared those non-POSA clinical polysomnographic characteristics. In subgroup (n =...

10.5664/jcsm.8752 article EN Journal of Clinical Sleep Medicine 2020-08-17

Summary Previous studies have highlighted the pivotal role of emotional regulation impairment in progression depressive and insomnia disorders, individually. Nevertheless, to date, no study has undertaken a direct comparison profiles individuals experiencing with or without major episode (MDE). In this study, our objective was closely examine multiple aspects among insomnia, concurrent depression. This descriptive observational involved 57 participants, comprising 27 comorbid chronic MDE, 30...

10.1111/jsr.14280 article EN Journal of Sleep Research 2024-06-28

Sleep apnoea specific heart rate response (ΔHR) has been identified as a promising biomarker for stratifying cardiovascular (CV) risk, and predicting positive airway pressure (PAP) benefit in obstructive sleep (OSA). However, the need prior manual scoring of respiratory events potentially limits accessibility reproducibility ΔHR. We aimed to evaluate association pulse oxygen desaturations automatically derived from oximetry (ΔHRoxi) with CV risk OSA. ΔHRoxi ΔHR were measured OSA patients...

10.1183/13993003.01883-2024 article EN cc-by-nc European Respiratory Journal 2025-02-20
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