Publications by authors named "Gilles Garcia"

Article Synopsis
  • - The French RAMSES study compared severe asthma patients managed in tertiary referral centres (TRCs) versus secondary care centres (SCCs) to understand differences in patient characteristics and care practices.
  • - A total of 2046 patients were included: 73.4% from TRCs and 26.6% from SCCs; key findings showed that TRC patients had more comorbidities but lower blood eosinophil counts and benefited more from educational programs and in-depth investigations.
  • - The study concluded that asthma care trajectories and patient phenotypes varied significantly between TRCs and SCCs, emphasizing the need for standardized approaches to managing severe asthma.
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Background: One of the major challenges in managing allergic bronchopulmonary aspergillosis remains consistent and reproducible assessment of response to treatment.

Research Question: What are the most relevant changes in CT scan parameters over time for assessing response to treatment?

Study Design And Methods: In this ancillary study of a randomized clinical trial (NebuLamB), patients with asthma with available CT scan and without exacerbation during a 4-month allergic bronchopulmonary aspergillosis exacerbation treatment period (corticosteroids and itraconazole) were included. Changed CT scan parameters were assessed by systematic analyses of CT scan findings at initiation and end of treatment.

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Background And Aim: Few questionnaires are available for routine assessment of dyspnea. The study aimed to design a self-administered questionnaire assessing the impact of chronic dyspnea on daily activities, named DYSLIM (Dyspnea-induced Limitation).

Methods: The development followed 4 steps: 1: selection of relevant activities and related questions (focus groups); 2: clinical study: internal and concurrent validity vs.

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Article Synopsis
  • Dyspnea, a common symptom in asthma, is influenced by anxiety and hyperventilation, which often occur alongside the condition.
  • A study involving 142 asthmatic adults analyzed the sensory and affective aspects of dyspnea, revealing that many patients experienced severe symptoms linked to poor asthma control, hyperventilation, and anxiety.
  • Results showed significant reductions in dyspnea severity after six months, highlighting the importance of addressing both hyperventilation and anxiety for better asthma management.
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Primary ciliary dyskinesia (PCD) is a rare genetical disease characterized by an abnormal structure or function of the cilia, causing sinusitis, otitis, and bronchiectasis. Hearing loss affects 60% of PCD patients, but data are lacking concerning hearing and temporal bone imaging in adults. Our aim was to describe clinical and radiological ear disease in adults with genetically confirmed PCD.

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Objective: To characterise uncontrolled severe asthma and compare the disease burden with the general and asthmatic populations.

Design: Retrospective observational study using a national sample of a French healthcare database (Echantillon Généraliste des Bénéficiaires (EGB)).

Setting: The EGB, an anonymised permanent sample of health insurance databases, representing 1/97th of the French population.

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Background: In allergic bronchopulmonary aspergillosis (ABPA), prolonged nebulised antifungal treatment may be a strategy for maintaining remission.

Methods: We performed a randomised, single-blind, clinical trial in 30 centres. Patients with controlled ABPA after 4-month attack treatment (corticosteroids and itraconazole) were randomly assigned to nebulised liposomal amphotericin-B or placebo for 6 months.

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Sleep-related breathing disorders, including sleep apnea and hypoxemia during sleep, are common in pulmonary arterial hypertension, but the underlying mechanisms remain unknown. Overnight fluid shift from the legs to the upper airway and to the lungs promotes obstructive and central sleep apnea, respectively, in fluid-retaining states. The main objective was to evaluate if overnight rostral fluid shift from the legs to the upper part of the body is associated with sleep-related breathing disorders in pulmonary arterial hypertension.

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Background: Dupilumab is a monoclonal anti-IL-4Rα antibody developed for the treatment of severe asthma (SA). An early access programme for dupilumab was opened in France in SA patients experiencing unacceptable steroids side-effects and/or life-threatening exacerbations.

Objective: To assess changes in asthma control between baseline and 12 months of treatment.

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Background: Mepolizumab was available in France as part of an early access programme for patients with severe eosinophilic asthma (nominative [temporary use authorisation] (nATU)) before its commercialisation. This study aimed to characterise patients who received mepolizumab in the nATU.

Methods: This retrospective, observational study analysed data from the hospital medical records of patients up to 24 months after treatment initiation.

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Background And Objective: Ventilatory inefficiency (high V'/V'CO) and resting hypocapnia are common in pulmonary vascular disease and are associated with poor prognosis. Low resting PaCO suggests increased chemosensitivity or an altered PaCO set-point. We aimed to determine the relationships between exercise gas exchange variables reflecting the PaCO set-point, exercise capacity, hemodynamics and V'/V'CO.

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Introduction: Migraine and asthma are two frequent, disabling, chronic disorders with a major impact on patient well-being. The objectives of this study were to compare subjective well-being between patients with severe forms of migraine or asthma using a panel of PROs.

Methods: Adult patients were recruited during routine consultations with chest physicians or neurologists.

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Options to achieve oral corticosteroid (OCS)-sparing have been triggering increasing interest since the 1970s because of the side-effects of OCSs, and this has now become achievable with biologics. The Société de Pneumologie de Langue Française workshop on OCSs aimed to conduct a comprehensive review of the basics for OCS use in asthma and issue key research questions. Pharmacology and definition of regular use were reviewed by the first working group (WG1).

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Dynamic hyperinflation is observed during exercise in 60% of patients with clinically stable pulmonary arterial hypertension (PAH) and chronic thromboembolic pulmonary hypertension (CTEPH), intensifying exertional dyspnoea. The impact of dynamic changes in respiratory mechanics during exercise on qualitative dimensions of dyspnoea in these patients has not been evaluated.26 patients (PAH n=17; CTEPH n=9) performed an incremental symptom-limited cycle exercise test.

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Inhaled corticosteroids (ICS) are the cornerstone of the management of asthma. Daily use allows to reduce mortality, intensity and frequency of exacerbations, to increase the control of symptoms of asthma and the quality of life of asthmatics patients and to reduce the decline of the lung function. A daily use of a weak dose of ICS allows to control the symptoms of asthma of the vast majority of mild to moderate asthmatics patients who account for about 75-80 % of the French asthmatic patients.

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The benefit of exercise has been demonstrated in asthma, but the role of pulmonary rehabilitation (PR) in people with severe asthma, especially with airway obstruction, has been less investigated. The activity limitation mechanisms differ in asthma and COPD, so the effect of a PR program not specific to asthma is unclear. We retrospectively compared the effect of an ambulatory PR program in nonsmoking patients with severe asthma and airway obstruction (FEV1/FVC ratio <70% and FEV1 < 80% measured twice, not under an exacerbation) and sex-, age-, FEV1-, and BMI-matched COPD controls.

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The lungs and heart are irrevocably linked in their oxygen (O) and carbon dioxide (CO) transport functions. Functional impairment of the lungs often affects heart function and The steepness with which ventilation (') rises with respect to CO production (' ) ( the '/' slope) is a measure of ventilatory efficiency and can be used to identify an abnormal ventilatory response to exercise. The '/' slope is a prognostic marker in several chronic cardiopulmonary diseases independent of other exercise-related variables such as peak O uptake (' ).

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There is growing recognition of the clinical importance of pulmonary haemodynamics during exercise, but several questions remain to be elucidated. The goal of this statement is to assess the scientific evidence in this field in order to provide a basis for future recommendations.Right heart catheterisation is the gold standard method to assess pulmonary haemodynamics at rest and during exercise.

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Background: Systemic vascular resistance (SVR) and total arterial compliance (TAC) modulate systemic arterial load, and their product is the time constant (Tau) of the Windkessel. Previous studies have assumed that aortic pressure decays towards a pressure asymptote (P∞) close to 0mmHg, as right atrial pressure is considered the outflow pressure. Using these assumptions, aortic Tau values of ∼1.

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Background: Cardiopulmonary exercise testing (CPET) is frequently used for the evaluation of patients with pulmonary hypertension (PH). Non-operable distal chronic thromboembolic pulmonary hypertension (CTEPH) represents a unique subgroup of PH where microvascular disease resembling pulmonary arterial hypertension (PAH) may predominate and efficacious medical therapy is now available. However, little is known regarding the detailed CPET profile of patients with distal CTEPH, and whether ventilation and gas exchange responses are different from PAH.

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Asthma is a heterogeneous condition, with dyspnoea during exercise affecting individuals to a variable degree. This narrative review explores the mechanisms and measurement of exertional dyspnoea in asthma and summarises the available evidence for the efficacy of various interventions on exertional dyspnoea. Studies on the mechanisms of dyspnoea in asthma have largely utilised direct bronchoprovocation challenges, rather than exercise, which may invoke different physiological mechanisms.

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We report on an artificially intelligent nanoarray based on molecularly modified gold nanoparticles and a random network of single-walled carbon nanotubes for noninvasive diagnosis and classification of a number of diseases from exhaled breath. The performance of this artificially intelligent nanoarray was clinically assessed on breath samples collected from 1404 subjects having one of 17 different disease conditions included in the study or having no evidence of any disease (healthy controls). Blind experiments showed that 86% accuracy could be achieved with the artificially intelligent nanoarray, allowing both detection and discrimination between the different disease conditions examined.

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