Purpose: Hypercapnia increases minute ventilation (V’E) with little effect on heart rate (HR), whereas hypoxia may increase HR without affecting V’E. However, the effects of hypercapnia and hypoxia on both heart rate variability (HRV) and the clustering of heart beats during spontaneous breathing (respiratory sinus arrhythmia – RSA), are not clear. Methods: In this study, 10 human volunteers breathed room air (RA), hypercapnic (5% CO 2 ) or hypoxic (10% O 2 ) gas mixtures, each for 6 min, while resting supine. ECG, mean arterial pressure (MAP), ventilatory flow, inhaled and exhaled fractions of CO 2 and O 2 , were recorded throughout. Results: Both V’E and MAP increased with 5% CO 2 , with no change in HR. H...
The aim of this study was to ascertain the persistence of heart rate and blood pressure oscillations...
Heart rate variability is commonly interpreted as a measure of vagal tone. Changes in heart rate va...
CONTEXT AND OBJECTIVE: Impaired autonomic cardiac function is an important consequence of obstructiv...
Hypercapnia increase minute ventilation (V'E) with little effect on heart rate (HR), whereas hypoxia...
Acute hypoxia may alter autonomic cardiovascular reflexes during orthostasis. Heart rate variability...
Abstract Background: Hypoxia is a physiological condition that may affect the cardiac autonomic mod...
International audienceHeart rate variability (HRV) may be influenced by several factors, such as env...
Respiratory sinus arrhythmia (RSA) refers to the changes in heart rate (HR) that occur with respirat...
Purpose: We aimed to investigate respiratory rate variability (RRV) and tidal volume (Vt) variabilit...
Purpose: This study aimed to investigate the differences between normobaric (NH) and hypobaric hypox...
Purpose: Increased variability in cerebral blood flow (CBF) predisposes to adverse cerebrovascular e...
Item does not contain fulltextNEW FINDINGS: What is the central question of this study? Right ventri...
Intermittent hypoxia (IH) produces autonomic dysfunction that promotes the development of arrhythmia...
Healthy humans exposed to acute intermittent hypoxia (IH) demonstrate comparable physiological respo...
OBJECTIVE: To confirm the hypothesis that the ventilatory response to hypoxia (VRH) may be abolished...
The aim of this study was to ascertain the persistence of heart rate and blood pressure oscillations...
Heart rate variability is commonly interpreted as a measure of vagal tone. Changes in heart rate va...
CONTEXT AND OBJECTIVE: Impaired autonomic cardiac function is an important consequence of obstructiv...
Hypercapnia increase minute ventilation (V'E) with little effect on heart rate (HR), whereas hypoxia...
Acute hypoxia may alter autonomic cardiovascular reflexes during orthostasis. Heart rate variability...
Abstract Background: Hypoxia is a physiological condition that may affect the cardiac autonomic mod...
International audienceHeart rate variability (HRV) may be influenced by several factors, such as env...
Respiratory sinus arrhythmia (RSA) refers to the changes in heart rate (HR) that occur with respirat...
Purpose: We aimed to investigate respiratory rate variability (RRV) and tidal volume (Vt) variabilit...
Purpose: This study aimed to investigate the differences between normobaric (NH) and hypobaric hypox...
Purpose: Increased variability in cerebral blood flow (CBF) predisposes to adverse cerebrovascular e...
Item does not contain fulltextNEW FINDINGS: What is the central question of this study? Right ventri...
Intermittent hypoxia (IH) produces autonomic dysfunction that promotes the development of arrhythmia...
Healthy humans exposed to acute intermittent hypoxia (IH) demonstrate comparable physiological respo...
OBJECTIVE: To confirm the hypothesis that the ventilatory response to hypoxia (VRH) may be abolished...
The aim of this study was to ascertain the persistence of heart rate and blood pressure oscillations...
Heart rate variability is commonly interpreted as a measure of vagal tone. Changes in heart rate va...
CONTEXT AND OBJECTIVE: Impaired autonomic cardiac function is an important consequence of obstructiv...