Influence of adaptive servoventilation therapy on autonomic function and baroreceptor reflex sensitivity in heart failure patients with Cheyne-Stokes respiration compared to healthy volunteers

Adaptive servoventiation therapy (ASV) is designed to treat hypocapnic central sleep apnoea (Cheyne-Stokes respiration) in heart failure (HF) . It remains unclear whether this therapy increases stroke volume (SV) and if, this is mediated by a decrease in cardiac afterload due to increased parasympathetic nervous activity (PNA) or by a change in baroreceptor reflex sensitivity.12 patients with HF (12 male; 70 ± 9 years; NYHA ≥ II; EF ≤ 45% and Cheyne- Stokes respiration) and 14 healthy volunteers (13 male, 24 ± 4 years, EF ≥ 60%, AHI
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: 4.2 Sleep and Control of Breathing Source Type: research

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Cheyne-Stokes respiration (CSR) - a type of periodic breathing characterised by periods of hyperventilation (crescendo-decrescendo pattern) that alternate with central apneas - is highly prevalent in patients with systolic heart failure (HF) [1 –3]. CSR has been hypothesised to further increase sympathetic drive and stroke volume, thus exerting detrimental effects if left untreated [4]. At least, this is what most people thought prior to publication of the SERVE-HF trial in 2015 [5]. This trial enrolled more than 1300 patients with systo lic HF and central sleep apnea who were randomly assigned to adaptive servo-vent...
Source: International Journal of Cardiology - Category: Cardiology Authors: Tags: Editorial Source Type: research
Sara AlMarabeh, Mohammed H. Abdulla and Ken D. O'Halloran* Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland Renal sensory nerves are important in the regulation of body fluid and electrolyte homeostasis, and blood pressure. Activation of renal mechanoreceptor afferents triggers a negative feedback reno-renal reflex that leads to the inhibition of sympathetic nervous outflow. Conversely, activation of renal chemoreceptor afferents elicits reflex sympathoexcitation. Dysregulation of reno-renal reflexes by suppression of the inhibitory refle...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
AbstractEnvironmental noise is a well ‐recognized health risk and part of the external exposome—the World Health Organization estimates that 1 million healthy life years are lost annually in Western Europe alone due to noise‐related complications, including increased incidence of hypertension, heart failure, myocardial infarction, and stroke. Previous data suggest that noise works through two paired pathways in a proposed reaction model for noise exposure. As a nonspecific stressor, chronic low‐level noise exposure can cause a disruption of sleep and communication leading to annoyance and subsequent sympathetic...
Source: BioFactors - Category: Biochemistry Authors: Tags: Review Article Source Type: research
If you live near an airport, railroad tracks or a busy road, you might be concerned about how fumes from those planes, trains and automobiles are affecting your health. But according to a new review in the Journal of the American College of Cardiology, there may be another threat to worry about: high levels of noise that may be bad for your heart. A connection between noise pollution and cardiovascular disease has been observed in numerous studies over the years, the authors of the new review said. High decibel levels from road traffic and airplanes, for example, has been linked to high blood pressure, coronary artery dise...
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized are loud noises unhealthy healthytime Heart Disease heart disease risks heart health Journal of the American College of Cardiology noise level meter noise meter noise pollution noise-cancelling headphones onetime Rese Source Type: news
Obstructive sleep apnoea syndrome is an important health problem which may cause or worsen systemic diseases. Chronic intermittent hypoxia during repetitive airflow cessations may cause endothelial dysfunction. Sleep apnoea is also shown to be associated with hypercoagulability which may be due to decreased nitric oxide levels and impaired vasodilatation. Endothelial dysfunction, increased systemic inflammation, sympathetic nervous system activation, increased oxidative stress and dysglycaemia may all contribute to cardiovascular processes such as hypertension, arrhythmia, stroke, heart failure and coronary artery disease ...
Source: Postgraduate Medical Journal - Category: Journals (General) Authors: Tags: Reviews Source Type: research
Obstructive sleep apnea (OSA) is present in up to 25% of otherwise healthy individuals. OSA is associated with intermittent hypoxia, oxidative stress, sympathetic activation, and an inflammatory response. These perturbations mediate the role of OSA as an independent and modifiable risk factor for cardiovascular disease (CVD). OSA can induce CVD or accelerate the progression of CVD into an end-stage disorder, including heart failure and stroke. Current clinical recommendations are based on existing clinical trial data and the clinical experience of our program; current and future clinical trials will help to optimize manage...
Source: Sleep Medicine Clinics - Category: Sleep Medicine Authors: Source Type: research
Abstract Sleep-disordered breathing (SDB) is the most common comorbidity in heart failure (HF) patients. SDB, including both central sleep apnea (CSA) and obstructive sleep apnea (OSA), affects up to 70 % of all heart patients. Numerous studies have identified intermittent hypoxia, oxidative stress, and sympathetic activation as the main pathways through which SDB exerts its negative cardiovascular consequences. The etiological relation between SDB and HF is complex and multi-layered. On one level, SDB contributes to the progression of cardiovascular disease (CVD) into HF; on another level, SDB is a conseque...
Source: Current Cardiovascular Risk Reports - Category: Cardiology Source Type: research
Please wait while the activity loads. If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled. If loading fails, click here to try again Click on the 'Start' button to begin the mock test. After answering all questions, click on the 'Get Results' button to display your score and the explanations. There is no time limit for this mock test. Start Congratulations - you have completed DM / DNB Cardiology Entrance Mock Test 7. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rate...
Source: Cardiophile MD - Category: Cardiology Authors: Tags: Cardiology MCQ DM / DNB Cardiology Entrance Featured Source Type: blogs
Obstructive and central sleep apnea have been associated with increased risk of adverse cardiovascular events and mortality. Sympathetic dysregulation occurring as a result of the respiratory disturbance is thought to play a role in this increased risk. Sleep apnea increases the risk of arrhythmias, myocardial ischemia/infarction, stroke, and heart failure, all of which may increase mortality risk. A higher incidence of nocturnal arrhythmias, cardiac ischemia, and sudden death has been noted in subjects with sleep-disordered breathing (SDB). In this review, the association between SDB and each of these conditions is discus...
Source: AJP: Heart and Circulatory Physiology - Category: Cardiology Authors: Tags: CALL FOR PAPERS Source Type: research
Abstract Obstructive and central sleep apnea have been associated with increased risk of adverse cardiovascular events and mortality. Sympathetic dysregulation occurring as a result of the respiratory disturbance is thought to play a role in this increased risk. Sleep apnea increases the risk of arrhythmias, myocardial ischemia/infarction, stroke, and heart failure, all of which may increase mortality risk. A higher incidence of nocturnal arrhythmias, cardiac ischemia and sudden death has been noted in subjects with sleep disordered breathing (SDB). In this review, the association between SDB and each of these con...
Source: American Journal of Physiology. Heart and Circulatory Physiology - Category: Physiology Authors: Tags: Am J Physiol Heart Circ Physiol Source Type: research
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