Publications by authors named "Renaud Tamisier"

: This study determined real-life care trajectories before and after initiation of noninvasive ventilation (NIV) in patients with amyotrophic lateral sclerosis (ALS). Caregiver adherence to respiratory management recommendations and the associated survival rate of people with ALS were also assessed. : Data were obtained from a tertiary center prospective ALS database that included 10 years of follow-up data for people with ALS.

View Article and Find Full Text PDF

Background: A large number of symptomatic individuals with central sleep apnea (CSA) in clinical practice have an indication for adaptive servo-ventilation (ASV) therapy.

Research Question: What are the effects of ASV therapy on sleep quality and PROMs in patients with CSA across a range of devices and indications.

Methods: This prospective, multicenter, observational cohort study was conducted in France and enrolled participants from June 2017 to February 2020.

View Article and Find Full Text PDF

Obstructive sleep apnoea (OSA) contributes to cerebrovascular diseases and cognitive decline. Preclinical studies support the deleterious impact on the brain of intermittent hypoxia (IH), one of the main components of OSA, but heterogeneity in rodent species and brain regions studied, or induced by IH paradigms, can challenge interpretation of the studies. Hence, we conducted a systematic review and meta-analysis to evaluate the impact of IH on rodent brain oxidative stress, inflammation, apoptosis and the expression of brain-derived neurotrophic factor (BDNF) and hypoxia-inducible factor 1 (HIF-1).

View Article and Find Full Text PDF

Background: The ever-increasing number of patients diagnosed with obstructive sleep apnoea (OSA) and treated by long-term continuous positive airway pressure (CPAP) overstretches conventional follow-up pathways. New approaches to the management of CPAP-treated patient follow-up are needed to strike a balance between remote monitoring through digital technologies and in-person patient-healthcare-professional contacts. Focusing on the reshaping of the management of care pathways of CPAP-treated patients, with a specific focus on telemonitoring platforms, we aimed to review the evidence on how digital medicine and artificial intelligence (AI) tools are facilitating patient phenotyping and triage, risk stratification and the allocation of resources between the various healthcare professionals for an optimal follow-up of CPAP-treated patients.

View Article and Find Full Text PDF
Article Synopsis
  • This study aimed to examine sleep patterns in individuals with glaucoma compared to those without, using detailed sleep data collected through polysomnography.
  • Researchers analyzed sleep metrics like total sleep time and stages of sleep, ensuring to control for factors such as age and other health conditions.
  • Findings indicated no significant differences in total sleep time or sleep structure between the two groups, suggesting that glaucoma does not markedly affect sleep quality when accounting for other influences.
View Article and Find Full Text PDF
Article Synopsis
  • There is a significant lack of data on the prevalence and clinical differences between obstructive sleep apnea (OSA), central sleep apnea (CSA), and their co-existence (CSA-OSA), particularly due to issues with scoring hypopneas in sleep labs.
  • A study of over 2,400 patients showed that correctly distinguishing between central and obstructive hypopneas significantly changes the perceived prevalence of CSA, highlighting its under-recognition when not properly classified.
  • Patients with CSA and co-existing CSA-OSA demonstrated the most severe comorbidities and sleep disturbances, suggesting tailored therapeutic approaches based on the specific type of sleep apnea are crucial for effective treatment.
View Article and Find Full Text PDF
Article Synopsis
  • The study investigates how Obstructive Sleep Apnea (OSA) contributes to respiratory issues and cardiac arrhythmias in patients after general anesthesia during the night following surgery.
  • It involved analyzing patients with varying degrees of OSA and assessing the frequency of hypoxic episodes and cardiac irregularities during their first and third nights post-operation.
  • Findings show that patients with moderate OSA experienced a higher incidence of cardiac arrhythmias linked to hypoxia on the third night after surgery, highlighting the need for better preoperative screening for OSA.
View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to identify factors predicting ongoing driving risks related to sleepiness in patients with obstructive sleep apnea (OSA) undergoing continuous positive airway pressure (CPAP) treatment.
  • Researchers analyzed data from over 5,300 patients, assessing incidents of near-misses and accidents before and after at least 90 days of CPAP therapy.
  • Findings revealed that ongoing sleepiness while driving and poor treatment adherence (less than 4 hours per night) significantly increased the likelihood of near-misses and accidents, highlighting the need for thorough follow-ups by health professionals.
View Article and Find Full Text PDF
Article Synopsis
  • Obstructive sleep apnea (OSA) impacts nearly 1 billion people globally, causing chronic intermittent hypoxia (CIH) that leads to organ damage, especially affecting the heart and visceral white adipose tissue (WAT).
  • The study aimed to explore if CIH causes premature senescence in visceral WAT, which in turn may trigger changes in heart structure and function.
  • Results showed that CIH caused significant changes in WAT and early signs of heart damage, but these effects could be mitigated through surgical removal of fat tissue or deletion of specific genes, highlighting visceral WAT senescence as a promising target for combating OSA-related issues.
View Article and Find Full Text PDF

Congenital central hypoventilation syndrome (CCHS) is a rare genetic disorder of the autonomic nervous system resulting in decreased brain sensitivity to hypercapnia and hypoxia characterized by a genetic abnormality in the pair-like homeobox 2B (PHOX2B) gene. Most patients have a heterozygous expansion of the polyalanine repeat in exon 3 (PARM), while 10 % of patients have non-PARM (NPARM) mutations that can span the entire gene. The majority of pathogenic variants are de novo, but variants with incomplete penetrance can be identified in the heterozygous state.

View Article and Find Full Text PDF

Background And Objectives: Sleepiness in patients with obstructive sleep apnea (OSA) is associated with accidental and economic burden, as well as cardiovascular risk. Despite OSA treatment, 10-28 % of patients report residual sleepiness. Its determinants, as well as those of objective impaired alertness remain poorly known.

View Article and Find Full Text PDF

Three-year continuous positive airway pressure (CPAP) therapy termination rates are up to 50%, and therapy termination is associated with higher all-cause mortality and incident cardiovascular event risk. This study investigated the impact of CPAP therapy termination in the first year on long sick leave leading to permanent work disability in patients with obstructive sleep apnea based on data from the Nationwide Claims Data Lake for Sleep Apnoea (ALASKA). French national health insurance reimbursement system data were analyzed for all adults with OSA aged ≤62 years who started CPAP therapy in France in 2015 and 2016.

View Article and Find Full Text PDF

Sympathetic overactivity caused by chronic intermittent hypoxia is a hallmark of obstructive sleep apnea. A high sympathetic tone elicits increases in plasma free fatty acid and insulin. Our objective was to assess the impact of 14 nights of chronic intermittent hypoxia exposure on sympathetic activity, glucose control, lipid profile and subcutaneous fat tissue remodelling in non-obese healthy humans.

View Article and Find Full Text PDF

Excessive daytime sleepiness (EDS) is frequent among patients with obstructive sleep apnea hypopnea syndrome (OSAHS) and can persist despite the optimal correction of respiratory events (apnea, hypopnea and respiratory efforts), using continuous positive airway pressure (CPAP) or mandibular advancement device. Symptoms like apathy and fatigue may be mistaken for EDS. In addition, EDS has multi-factorial origin, which makes its evaluation complex.

View Article and Find Full Text PDF

Obstructive sleep apnea is a common type of sleep-disordered breathing associated with multiple comorbidities. Nearly a billion people are estimated to have obstructive sleep apnea, which carries a substantial economic burden, but under-diagnosis is still a problem. Continuous positive airway pressure (CPAP) is the first-line treatment for OSAS.

View Article and Find Full Text PDF

Objective/background: Chronic obstructive pulmonary disease (COPD), obstructive sleep apnea (OSA) and their comorbid association called Overlap Syndrome (OS) are frequent chronic diseases with high individual and societal burdens. Precise descriptions of the respective symptoms, comorbidities, and medications associated with these three conditions are lacking. We used a multidimensional phenotyping approach to identify relevant phenotypes characterizing these 3 disorders.

View Article and Find Full Text PDF

In contrast to obstructive sleep apnoea, the peak of sympathetic tone in central sleep apnoea occurs during the hyperventilation phase. To explore the temporal association of premature ventricular complex (PVC) burden in the context of the apnoea/hypopnoea-hyperpnoea cycle, the duration of apnoea/hypopnoea was defined as 100 %. We assessed the PVC burden throughout the apnoea/hypopnoea-hyperpnoea cycle during the periods of ±150 % in 50 % increments before and after the apnoea/hypopnoea phase.

View Article and Find Full Text PDF

Recent scientific findings in the field of sleep disordered breathing have characterised a variety of phenotypes in obstructive sleep apnoea. These findings have prompted investigations aiming to achieve a more precise differentiation and description of the entities of central sleep apnoea (CSA). There is increasing evidence for the heterogeneity of CSA in terms of underlying aetiology, pathophysiological concepts, treatment response and outcome.

View Article and Find Full Text PDF

Introduction: Obstructive sleep apnoea syndrome (OSAS) is a chronic multiorgan pathology that has a negative impact on quality of life. Continuous positive airway pressure (CPAP) is the first-line treatment for OSAS. However, CPAP termination rates remain very high, and adherence to therapy is a major issue.

View Article and Find Full Text PDF

Oral appliances are second-line treatments after continuous positive airway pressure for obstructive sleep apnea (OSA) management. However, the need for oral appliance titration limits their use as a result of monitoring challenges to assess the treatment effect on OSA. To assess the validity of mandibular jaw movement (MJM) automated analysis compared with polysomnography (PSG) and polygraphy (PG) in evaluating the effect of oral appliance treatment and the effectiveness of MJM monitoring for oral appliance titration at home in patients with OSA.

View Article and Find Full Text PDF

Obstructive sleep apnea (OSA) induces intermittent hypoxia (IH), an independent risk factor for non-alcoholic fatty liver disease (NAFLD). While the molecular links between IH and NAFLD progression are unclear, immune cell-driven inflammation plays a crucial role in NAFLD pathogenesis. Using lean mice exposed to long-term IH and a cohort of lean OSA patients (n = 71), we conducted comprehensive hepatic transcriptomics, lipidomics, and targeted serum proteomics.

View Article and Find Full Text PDF