Periodic Breathing during Incremental Exercise
نویسندگان
چکیده
منابع مشابه
Control of breathing during exercise.
During exercise by healthy mammals, alveolar ventilation and alveolar-capillary diffusion increase in proportion to the increase in metabolic rate to prevent PaCO2 from increasing and PaO2 from decreasing. There is no known mechanism capable of directly sensing the rate of gas exchange in the muscles or the lungs; thus, for over a century there has been intense interest in elucidating how respi...
متن کاملThe pattern and timing of breathing during incremental exercise: a normative study.
Clinical evaluation of the pattern and timing of breathing during submaximal exercise can be valuable for the identification of the mechanical ventilatory consequences of different disease processes and for assessing the efficacy of certain interventions. Sedentary individuals (60 male/60 female, aged 20-80 yrs) were randomly selected from >8,000 subjects and submitted to ramp incremental cycle...
متن کاملAirway obstruction, dynamic hyperinflation, and breathing pattern during incremental exercise in COPD patients
Ventilatory capacity is reduced in chronic obstructive pulmonary disease (COPD) patients. Tidal volume (V T) is lower and breathing frequency higher at a given ventilation (V E) compared to healthy subjects. We examined whether airflow limitation and dynamic hyperinflation in COPD patients were related to breathing pattern. An incremental treadmill exercise test was performed in 63 COPD patient...
متن کاملPeriodic breathing in healthy humans at exercise in hypoxia.
Periodic breathing is frequent in heart failure or ventilatory disorders during sleep, and common during sleep at high altitude, but has been rarely studied in wakefulness and during exercise. A retrospective analysis of ventilation from hypoxia exercise tests was realized in 82 healthy subjects separated into two groups with either high or low ventilatory response to hypoxia at exercise (HVRe)...
متن کاملAcetazolamide and inhaled carbon dioxide reduce periodic breathing during exercise in patients with chronic heart failure.
BACKGROUND Periodic breathing (PB) during sleep and exercise in heart failure (HF) is related to respiratory acid-base status, CO2 chemosensitivity, and temporal dynamics of CO2 and O2 sensing. We studied inhaled CO2 and acetazolamide to alter these factors and reduce PB. METHODS AND RESULTS We measured expired and arterial gases and PB amplitude and duration in 20 HF patients during exercise...
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ژورنال
عنوان ژورنال: Annals of the American Thoracic Society
سال: 2017
ISSN: 2329-6933,2325-6621
DOI: 10.1513/annalsats.201701-003fr