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Association of hyperventilation-induced heart rate variability and sudden unexpected death in epilepsy in drug-resistant epilepsy.
Arq Neuropsiquiatr
October 2024
Eskisehir Osmangazi University Faculty of Medicine, Department of Neurology, Eskisehir, Turkey.
Background: Within the general epilepsy population, the incidence of Sudden Unexpected Death in Epilepsy (SUDEP) ranges from approximately 0.35 to 2.3 per 1,000 individuals per year.
View Article and Find Full Text PDFEffect of Volitional Modification of Breath Frequency on Attention and Mood States: An Exploratory Randomized Crossover Study.
Int J Yoga
September 2024
Department of Yoga Science, University of Patanjali, Haridwar, Uttarakhand, India.
Article Synopsis
- The study investigated how different breathing frequencies in yoga (high-frequency vs. low-frequency) impact mood, attention, and other mental states.
- Thirty young adults participated, with one group practicing high-frequency breathing and the other low-frequency breathing on different days, while various physiological and psychological measures were recorded.
- Results showed that high-frequency yoga breathing increased alertness and positive mood but raised diastolic blood pressure, while low-frequency breathing improved relaxation and mental calmness, decreasing systolic blood pressure.
Exogenous ketosis attenuates acute mountain sickness and mitigates normobaric high-altitude hypoxemia.
J Appl Physiol (1985)
November 2024
Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium.
Acute mountain sickness (AMS) represents a considerable issue for individuals sojourning to high altitudes with systemic hypoxemia known to be intimately involved in its development. Based on recent evidence that ketone ester (KE) intake attenuates hypoxemia, we investigated whether exogenous ketosis might mitigate AMS development and identified underlying physiological mechanisms. Fourteen healthy, male participants were enrolled in two 29-h protocols (simulated altitude of 4,000-4,500 m) receiving either KE or a placebo (CON) at regular timepoints throughout the protocol in a randomized, crossover manner.
View Article and Find Full Text PDFTemporal association of ventricular arrhythmias and respiratory events in heart failure patients with central sleep apnoea.
Sleep Med
June 2024
Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany.
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 PDFSurge of Sympathetic Activity during Hyperventilation at the End of Apnea for Patients with Obstructive Sleep Apnea.
Medicina (Kaunas)
February 2024
Department of Family Medicine, Tainan Municipal Hospital (Managed by Show Chwan Medical Care Corporation), 670 Chung-Te Road, Tainan 701, Taiwan.
: The mechanisms connecting obstructive sleep apnea (OSA) and cardiovascular disease are multifactorial, involving intermittent hypoxia, hypercapnia, and sympathetic activation. The aim of this study was to explore the oscillations of sympathetic activity during the sleep apnea episodes throughout the entire night in patients with OSA. : The participants received whole-night polysomnography (PSG), and electrocardiogram (EKG) data from the PSG were collected for heart rate variability (HRV) analysis.
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