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New-onset atrial fibrillation (NOAF) is common in patients treated on an intensive care unit (ICU). Onset of certain arrhythmias exhibit circadian variation. Whether NOAF follows a circadian rhythm in patients in ICU is unknown. We undertook a retrospective observational study of two ICU databases to explore the timing of NOAF onset. We identified 2017 patients who developed NOAF during their ICU stay. NOAF onset exhibited a bimodal distribution with peaks at 8 am and 8 pm, consistent with the onset of paroxysmal AF in patients in the community. Future studies in ICUs should record time of AF onset, as understanding high risk periods may inform timing of preventative interventions.
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http://dx.doi.org/10.1016/j.jcrc.2021.09.008 | DOI Listing |
Ann Am Thorac Soc
September 2025
University of Florida, Department of Medicine, Gainesville, Florida, United States;
Background: Pulmonary hypertension (PH) is a systemic illness with increasingly subtle disease manifestations including sleep disruption. Patients with PH are at increased risk for disturbances in circadian biology, although to date there is no data on "morningness" or "eveningness" in pulmonary vascular disease.
Research Questions: Our group studied circadian rhythms in PH patients based upon chronotype analysis, to explore whether there is a link between circadian parameters and physiologic risk-stratifying factors to inform novel treatment strategies in patients with PH?
Study Design And Methods: We serially recruited participants from July 2022 to March 2024, administering in clinic the Munich Chronotype Questionnaire (MCTQ).
Mar Life Sci Technol
August 2025
Laboratory of Marine Organism Taxonomy and Phylogeny, Qingdao Key Laboratory of Marine Biodiversity and Conservation, and The Key Laboratory of Experimental Marine Biology, Centre for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266000 China.
Unlabelled: The distribution of (Euphrasen, 1788) spans a pronounced latitudinal-environmental gradient from the subtropical to the subpolar zones. The species is reported to have multiple stocks along coastal China, exhibiting different spawning behaviors and habitat preferences. Such ecological variations might imply potential genetic divergence and local adaptation.
View Article and Find Full Text PDFSleep Adv
July 2025
Lindner Center of HOPE Research Institute, Mason, OH, United States.
Study Objectives: Dim light melatonin onset (DLMO) is the best-established marker of central circadian phase and may contribute to unraveling the role of the circadian system in obesity. This study evaluated DLMO among individuals with obesity using a home-based assessment and explored its clinical correlates and procedural variations.
Method: Fifty-eight women (mean [SD] age 40.
FASEB J
September 2025
Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai, China.
The molecular clock exhibits distinct characteristics across various tissues and can be synchronized by particular stimuli. Furthermore, there is an intricate interplay among the molecular clocks within different tissues. In this context, we present an overview of the tissue-specific molecular clock and discuss pivotal nonphotic regulators that govern the host's circadian rhythms and metabolic processes.
View Article and Find Full Text PDFClin Neurophysiol
August 2025
Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK.
Objective: This study presents a comprehensive analysis of electrochemical skin conductance (ESC) values collected from over 1.9 million measurements using Withings Body Scan and Body Comp scales. It aimed at establishing descriptive values for ESC while correcting for the influence of age, sex, and circadian and seasonal variations on sudomotor function.
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