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Martynowicz H, Lavigne G, Kato T, Poreba R, Michalek-Zrabkowska M, Macek P, Gac P, Wojakowska A, Surowiak P, Mazur G, Wieckiewicz M. A case-control study on the effect of rhythmic masticatory muscle activity (RMMA) clusters on sleep fragmentation and severity of orofacial muscle pain in sleep bruxism. J Sleep Res 2024; 33:e14072. [PMID: 37859534 DOI: 10.1111/jsr.14072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 09/14/2023] [Accepted: 10/02/2023] [Indexed: 10/21/2023]
Abstract
Rhythmic masticatory muscle activity (RMMA) is a periodic muscle activity that characterises sleep bruxism (SB) events. These can occur as a single event, in pairs, or in clusters. Since RMMA episodes often occur in clusters and the relevance of this occurrence is unknown, we conducted a study to investigate the effect of RMMA clusters on sleep fragmentation and the severity of orofacial muscle pain. This study involved a secondary analysis using data from 184 adult subjects with orofacial muscle pain who underwent definitive polysomnography (PSG) for sleep bruxism diagnosis. Self-reported orofacial muscle pain (OFMP) was assessed using the numeric rating scale, and additional evaluation of side-to-side equivalence (symmetry) was described using a binary system. Among the 184 participants, 60.8% (n = 112) did not exhibit clusters and among the 72 participants with clusters, 36.1% (n = 26) and 63.9% (n = 46) were in the high and low RMMA frequency groups, respectively. The high SB group had significantly three times more phasic RMMA events than the noncluster group. A total of 89.67% (n = 165) of subjects reported orofacial muscle pain. While there was no difference in the severity of OFMP among groups, a significant decrease in symmetry between the severity of temporal muscle pain on the left and right sides was noted in the cluster group compared with the noncluster group. Clustering of RMMA events is associated with sleep fragmentation. The asymmetry of temporal muscle pain is related to the presence of RMMA clusters in sleep bruxism.
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Affiliation(s)
- Helena Martynowicz
- Department and Clinic of Internal Medicine, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Gilles Lavigne
- Faculty of Dental Medicine, Universite de Montreal, CIUSSS Nord Ile de Montreal and CHUM, Montreal, Canada
| | - Takafumi Kato
- Department of Oral Physiology, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Rafal Poreba
- Department and Clinic of Internal Medicine, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Monika Michalek-Zrabkowska
- Department and Clinic of Internal Medicine, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Piotr Macek
- Department and Clinic of Internal Medicine, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Pawel Gac
- Department of Population Health, Division of Environmental Health and Occupational Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Anna Wojakowska
- Department and Clinic of Internal Medicine, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Pawel Surowiak
- Department of Histology and Embryology, Faculty of Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Grzegorz Mazur
- Department and Clinic of Internal Medicine, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Mieszko Wieckiewicz
- Department of Experimental Dentistry, Wroclaw Medical University, Wroclaw, Poland
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Mather M. The emotion paradox in the aging body and brain. Ann N Y Acad Sci 2024; 1536:13-41. [PMID: 38676452 DOI: 10.1111/nyas.15138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2024]
Abstract
With age, parasympathetic activity decreases, while sympathetic activity increases. Thus, the typical older adult has low heart rate variability (HRV) and high noradrenaline levels. Younger adults with this physiological profile tend to be unhappy and stressed. Yet, with age, emotional experience tends to improve. Why does older adults' emotional well-being not suffer as their HRV decreases? To address this apparent paradox, I present the autonomic compensation model. In this model, failing organs, the initial phases of Alzheimer's pathology, and other age-related diseases trigger noradrenergic hyperactivity. To compensate, older brains increase autonomic regulatory activity in the pregenual prefrontal cortex (PFC). Age-related declines in nerve conduction reduce the ability of the pregenual PFC to reduce hyperactive noradrenergic activity and increase peripheral HRV. But these pregenual PFC autonomic compensation efforts have a significant impact in the brain, where they bias processing in favor of stimuli that tend to increase parasympathetic activity (e.g., stimuli that increase feelings of safety) and against stimuli that tend to increase sympathetic activity (e.g., threatening stimuli). In summary, the autonomic compensation model posits that age-related chronic sympathetic/noradrenergic hyperactivity stimulates regulatory attempts that have the side effect of enhancing emotional well-being.
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Affiliation(s)
- Mara Mather
- Leonard Davis School of Gerontology, Department of Psychology, and Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA
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Solhjoo S, Haigney MC, Siddharthan T, Koch A, Punjabi NM. Sleep-Disordered Breathing Destabilizes Ventricular Repolarization. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2023.02.10.23285789. [PMID: 36824787 PMCID: PMC9949208 DOI: 10.1101/2023.02.10.23285789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Rationale Sleep-disordered breathing (SDB) increases the risk of cardiac arrhythmias and sudden cardiac death. Objectives To characterize the associations between SDB, intermittent hypoxemia, and the beat-to-beat QT variability index (QTVI), a measure of ventricular repolarization lability associated with a higher risk for cardiac arrhythmias, sudden cardiac death, and mortality. Methods Three distinct cohorts were used for the current study. The first cohort, used for cross-sectional analysis, was a matched sample of 122 participants with and without severe SDB. The second cohort, used for longitudinal analysis, consisted of a matched sample of 52 participants with and without incident SDB. The cross-sectional and longitudinal cohorts were selected from the Sleep Heart Health Study participants. The third cohort comprised 19 healthy adults exposed to acute intermittent hypoxia and ambient air on two separate days. Electrocardiographic measures were calculated from one-lead electrocardiograms. Results Compared to those without SDB, participants with severe SDB had greater QTVI (-1.19 in participants with severe SDB vs. -1.43 in participants without SDB, P = 0.027), heart rate (68.34 vs. 64.92 beats/minute; P = 0.028), and hypoxemia burden during sleep as assessed by the total sleep time with oxygen saturation less than 90% (TST90; 11.39% vs. 1.32%, P < 0.001). TST90, but not the frequency of arousals, was a predictor of QTVI. QTVI during sleep was predictive of all-cause mortality. With incident SDB, mean QTVI increased from -1.23 to -0.86 over 5 years (P = 0.017). Finally, exposing healthy adults to acute intermittent hypoxia for four hours progressively increased QTVI (from -1.85 at baseline to -1.64 after four hours of intermittent hypoxia; P = 0.016). Conclusions Prevalent and incident SDB are associated with ventricular repolarization instability, which predisposes to ventricular arrhythmias and sudden cardiac death. Intermittent hypoxemia destabilizes ventricular repolarization and may contribute to increased mortality in SDB.
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Affiliation(s)
- Soroosh Solhjoo
- Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- F. Edward Hébert School of Medicine, Bethesda, Maryland, USA
| | - Mark C. Haigney
- F. Edward Hébert School of Medicine, Bethesda, Maryland, USA
- Military Cardiovascular Outcomes Research (MiCOR), Bethesda, Maryland, USA
| | | | - Abigail Koch
- University of Miami Miller School of Medicine, Miami, Florida, USA
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Zhang B, Lu S, Guo H, Xu J, Xiao Z, Tang J. Relationship between ODI and sleep structure of obstructive sleep apnea and cardiac remodeling. Sleep Breath 2024; 28:173-181. [PMID: 37453997 DOI: 10.1007/s11325-023-02872-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 04/27/2023] [Accepted: 06/12/2023] [Indexed: 07/18/2023]
Abstract
PURPOSE The purpose of the study was to evaluate the quantitative relationship between Oxygen Desaturation Index (ODI) and sleep structure of obstructive sleep apnea (OSA) and cardiac remodeling. METHODS In this study, patients were enrolled from January 2015 to October 2022, and were divided into 3 groups according to AHI: patients with AHI < 15, patients with 15 ≤ AHI < 30, and 260 patients with AHI ≥ 30. Stratified linear regression was used to analyze independent risk factors for cardiac remodeling in OSA. RESULTS A total of 479 patients were enrolled. We found that compared with AHI < 15 group (n = 120), the group with AHI > 30 (n = 260) had increased left atrial anteroposterior diameter, left ventricular end-diastolic internal diameter, left ventricular posterior wall thickness, right ventricular anteroposterior diameter, and interventricular septal thickness (P < 0.05). The group with 15 ≤ AHI ≤ 30 (n = 99) had increased left atrial anteroposterior diameter (P < 0.05). Multivariate linear regression revealed that N2 sleep was an independent risk factor for left ventricular posterior wall thickness, with positive correlation (p < 0.05). N3 sleep was an independent risk factor for transverse right atrial diameter and right ventricular anteroposterior diameter, with negative correlation (P < 0.05). ODI was an independent risk factor for interventricular septal thickness, with positive correlation (P < 0.05). The arousal index was an independent risk factor for increased left atrial anteroposterior diameter, with positive correlation (P < 0.05). CONCLUSIONS Increased ODI is an independent risk factor for interventricular septal thickness, while decreased slow wave sleep is an independent risk factor for right heart remodeling in OSA.
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Affiliation(s)
- Baokun Zhang
- Department of Neurology, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, NO. 16766 Jingshi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Shanshan Lu
- Department of Neurology, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Neuroimmunology, Jinan, People's Republic of China
| | - Huiying Guo
- Department of Neurology, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Neuroimmunology, Jinan, People's Republic of China
| | - Juanjuan Xu
- Department of Neurology, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Neuroimmunology, Jinan, People's Republic of China
| | - Zhang Xiao
- Department of Neurology, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Neuroimmunology, Jinan, People's Republic of China
| | - Jiyou Tang
- Department of Neurology, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, NO. 16766 Jingshi Road, Jinan, Shandong, 250012, People's Republic of China.
- Department of Neurology, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Neuroimmunology, Jinan, People's Republic of China.
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Zhu Y, Liu Y, Xu H, Zhao X, Li X, Huang W, Zhang X, Zhu H, Qian D, Yi H, Guan J, Yin S. Anthropometric Determinants of Autonomic Control in Obstructive Sleep Apnea: A Large-Scale Study. Otolaryngol Head Neck Surg 2023; 169:1070-1079. [PMID: 37191322 DOI: 10.1002/ohn.347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 02/07/2023] [Accepted: 03/13/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE Autonomic dysfunction is an independent risk factor for cardiovascular disease (CVD). Both obesity and obstructive sleep apnea (OSA) are associated with heart rate variability (HRV) (a hall marker of sympathetic arousal) and increased risk of CVD. This study aims to investigate whether anthropometric parameters could predict reduced HRV in adult OSA during wakefulness. STUDY DESIGN Cross-sectional study. SETTING Sleep center of Shanghai Jiao Tong University Affiliated Sixth Hospital from 2012 to 2017. METHODS Total of 2134 subjects (503 non-OSA and 1631 OSA) were included. Anthropometric parameters were recorded. HRV was recorded during a 5-minute wakefulness period and analyzed by using time-domain method and frequency-domain method. Multiple step-wise linear regressions were performed to determine significant predictors of HRV with and without adjustments. Multiplicative interactions between gender, OSA, and obesity on HRV were also determined and evaluated. RESULTS Waist circumference (WC) was significant negative determinant of root mean square of successive NN intervals (β = -.116, p < .001) and high-frequency power (β = -.155, p < .001). Age was the strongest determining factor of HRV. Significant multiplicative interactions between obesity and OSA on HRV, gender, and obesity on cardiovascular parameters were observed. CONCLUSION Anthropometric parameters could predict reduced HRV during wakefulness in patients with OSA, especially WC was the strongest influenceable factor. Obesity and OSA had significant multiplicative interaction on HRV. Gender and obesity had significant multiplicative interaction on cardiovascular parameters. Early intervention for obesity, especially centripetal obesity, may improve reduction of autonomic function and risk of CVD.
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Affiliation(s)
- Yaxin Zhu
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Yupu Liu
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Huajun Xu
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Xiaolong Zhao
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
- Department of Otolaryngology-Head and Neck Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Xinyi Li
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Weijun Huang
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Xiaoman Zhang
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Huaming Zhu
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Di Qian
- Department of Otolaryngology, People's Hospital of Longhua, Shenzhen, China
| | - Hongliang Yi
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Jian Guan
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Shankai Yin
- Department of Otolaryngology-Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University School of Medicine Affiliated Sixth People's Hospital, Shanghai, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
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Brislane Á, Davenport MH, Steinback CD. The sympathetic nervous system in healthy and hypertensive pregnancies: physiology or pathology? Exp Physiol 2023; 108:1238-1244. [PMID: 36459575 PMCID: PMC10988427 DOI: 10.1113/ep089665] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/18/2022] [Indexed: 09/30/2023]
Abstract
NEW FINDINGS What is the topic of this review? Sympathoexcitation in both healthy and hypertensive pregnancies, and concurrent adaptations along the neurovascular cascade. What advances does it highlight? Known and plausible adaptations along the neurovascular cascade which may offset elevated MSNA in normotensive pregnancy while also highlighting knowledge gaps regarding understudied pathways. ABSTRACT The progression from conception through to the postpartum period represents an extraordinary period of physiological adaptation in the mother to support the growth and development of the fetus. Healthy, normotensive human pregnancies are associated with striking increases in both plasma volume and sympathetic nerve activity, yet normal or reduced blood pressure; it represents a unique period of apparent healthy sympathetic hyperactivity. However, how this normal blood pressure is achieved in the face of sympathoexcitation, and the mechanisms responsible for this increased activity are unclear. Importantly, sympathetic activation has been implicated in hypertensive pregnancy disorders - the leading causes of maternal-fetal morbidity and mortality in the developed world. An understudied link between pregnancy and the development of maternal hypertension may lie in the sympathetic nervous system regulation of blood pressure. This brief review presents the latest data on sympathoexcitation in both healthy and hypertensive pregnancies, and concurrent adaptations along the neurovascular cascade.
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Affiliation(s)
- Áine Brislane
- Program for Pregnancy & Postpartum HealthNeurovascular Health Lab, Faculty of Kinesiology, Sport, and RecreationWomen and Children's Health Research InstituteAlberta Diabetes InstituteUniversity of AlbertaAlbertaCanada
| | - Margie H. Davenport
- Program for Pregnancy & Postpartum HealthNeurovascular Health Lab, Faculty of Kinesiology, Sport, and RecreationWomen and Children's Health Research InstituteAlberta Diabetes InstituteUniversity of AlbertaAlbertaCanada
| | - Craig D. Steinback
- Program for Pregnancy & Postpartum HealthNeurovascular Health Lab, Faculty of Kinesiology, Sport, and RecreationWomen and Children's Health Research InstituteAlberta Diabetes InstituteUniversity of AlbertaAlbertaCanada
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Azarbarzin A, Sands SA, Han S, Sofer T, Labarca G, Stone KL, Gottlieb DJ, Javaheri S, Wellman A, White DP, Redline S. Relevance of cortical arousals for risk stratification in sleep apnea: a 3 cohort analysis. J Clin Sleep Med 2023; 19:1475-1484. [PMID: 37086050 PMCID: PMC10394366 DOI: 10.5664/jcsm.10598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/28/2023] [Accepted: 03/29/2023] [Indexed: 04/23/2023]
Abstract
STUDY OBJECTIVES There is uncertainty on best approaches for defining apnea-hypopnea events. To clarify the contributions of desaturation vs arousal to defining hypopneas, we examined the associations of events with desaturation (≥ 3%) but not arousal (apnea-hypopnea index [AHI]≥3%Only) vs events with arousals but no desaturation (AHIArOnly) with obstructive sleep apnea-related comorbidities and incident cardiovascular disease across multiple cohorts. METHODS In the Sleep Heart Health Study (n = 5,473), the Multi-Ethnic Study of Atherosclerosis (n = 1,904), and the Osteoporotic Fractures in Men Study (n = 2,685), we examined the independent associations of AHI≥3%Only and AHIArOnly with hypertension, diabetes, and daytime sleepiness, and incident cardiovascular disease. RESULTS After adjusting for covariates and AHI based on events with electroencephalogram arousal (regardless of desaturation), AHI≥3%Only was associated with hypertension in Sleep Heart Health Study (odds ratio: 1.12; 95% confidence interval: 1.04,1.21), per 1 standard deviation increase). Similar associations were observed in the Multi-Ethnic Study of Atherosclerosis and Osteoporotic Fractures in Men Study, as well as for associations with diabetes (odds ratio: 1.30; 1.09,1.54, and 1.25; 1.07,1.47, respectively), sleepiness (odds ratio: 1.19; 1.00,1.41; and 1.17; 1.01-1.35), and incident cardiovascular disease (hazard ratio: 1.37; 1.05,1.77 and 1.14; 1.00,1.29). In contrast, after adjusting for events with desaturation (regardless of arousal), AHIArOnly was unassociated with these outcomes. In Sleep Heart Health Study, greater baseline obstructive sleep apnea severity was associated with a reduction in arousal frequency over 5 years (P < .0001). CONCLUSIONS In middle-aged and older individuals, addition of events with arousals does not improve the strength of associations with comorbidities or incident cardiovascular disease. Research is needed to understand generalizability to younger individuals and the mechanistic role of arousals in obstructive sleep apnea. CITATION Azarbarzin A, Sands SA, Han S, et al. Relevance of cortical arousals for risk stratification in sleep apnea: a 3 cohort analysis. J Clin Sleep Med. 2023;19(8):1475-1484.
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Affiliation(s)
- Ali Azarbarzin
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Scott A. Sands
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Shaoling Han
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Tamar Sofer
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Gonzalo Labarca
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Katie L. Stone
- Research Institute, California Pacific Medical Center, San Francisco, California
| | - Daniel J. Gottlieb
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Shahrokh Javaheri
- University of Cincinnati College of Medicine and the Bethesda North Hospital, Cincinnati, Ohio
| | - Andrew Wellman
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - David P. White
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Susan Redline
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
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Alterki A, Abu-Farha M, Al Shawaf E, Al-Mulla F, Abubaker J. Investigating the Relationship between Obstructive Sleep Apnoea, Inflammation and Cardio-Metabolic Diseases. Int J Mol Sci 2023; 24:ijms24076807. [PMID: 37047780 PMCID: PMC10095553 DOI: 10.3390/ijms24076807] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 04/14/2023] Open
Abstract
Obstructive sleep apnoea (OSA) is a prevalent underdiagnosed disorder whose incidence increases with age and weight. Uniquely characterised by frequent breathing interruptions during sleep-known as intermittent hypoxia (IH)-OSA disrupts the circadian rhythm. Patients with OSA have repeated episodes of hypoxia and reoxygenation, leading to systemic consequences. OSA consequences range from apparent symptoms like excessive daytime sleepiness, neurocognitive deterioration and decreased quality of life to pathological complications characterised by elevated biomarkers linked to endocrine-metabolic and cardiovascular changes. OSA is a well-recognized risk factor for cardiovascular and cerebrovascular diseases. Furthermore, OSA is linked to other conditions that worsen cardiovascular outcomes, such as obesity. The relationship between OSA and obesity is complex and reciprocal, involving interaction between biological and lifestyle factors. The pathogenesis of both OSA and obesity involve oxidative stress, inflammation and metabolic dysregulation. The current medical practice uses continuous positive airway pressure (CPAP) as the gold standard tool to manage OSA. It has been shown to improve symptoms and cardiac function, reduce cardiovascular risk and normalise biomarkers. Nonetheless, a full understanding of the factors involved in the deleterious effects of OSA and the best methods to eliminate their occurrence are still poorly understood. In this review, we present the factors and evidence linking OSA to increased risk of cardiovascular conditions.
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Affiliation(s)
- Abdulmohsen Alterki
- Department of Otolaryngology Head & Neck Surgery, Zain and Al Sabah Hospitals and Dasman Diabetes Institute, Dasman 15462, Kuwait
| | - Mohamed Abu-Farha
- Department of Biochemistry and Molecular Biology, Dasman Diabetes Institute, Dasman 15462, Kuwait
| | - Eman Al Shawaf
- Department of Biochemistry and Molecular Biology, Dasman Diabetes Institute, Dasman 15462, Kuwait
| | - Fahd Al-Mulla
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman 15462, Kuwait
| | - Jehad Abubaker
- Department of Biochemistry and Molecular Biology, Dasman Diabetes Institute, Dasman 15462, Kuwait
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Ahn S, Howie-Esquivel J, Davis EM, Chung ML, Lobo JM, Logan JG. Association of disrupted sleep with 24-hour blood pressure variability in caregivers. Heart Lung 2023; 60:45-51. [PMID: 36905754 DOI: 10.1016/j.hrtlng.2023.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/21/2023] [Accepted: 02/26/2023] [Indexed: 03/11/2023]
Abstract
BACKGROUND A growing body of research highlights the negative impact of caregiving on cardiovascular disease (CVD) risk. OBJECTIVES This study aimed to examine associations of psychological symptoms and sleep quality with 24-hour blood pressure variability (BPV), which is an independent predictor of CVD, among family caregivers of community-dwelling individuals with chronic illness. METHODS For this cross-sectional study, we assessed caregiving burden and depressive symptoms using questionnaires and 7-day sleep quality (i.e., number of awakenings, wake after sleep onset, sleep efficiency) using an actigraph. The participants carried out a 24-hour ambulatory BP monitoring for systolic and diastolic BPV over 24 h and during awake/sleep times. We performed Pearson's correlations and multiple linear regression. RESULTS The analytic sample consisted of 30 caregivers (25 female; mean age 62 years). The number of awakenings during sleep was positively correlated with systolic BPV-awake (r = 0.426, p = 0.019) and diastolic BPV-awake (r = 0.422, p = 0.020). Sleep efficiency was negatively correlated with diastolic BPV-awake (r = -0.368, p = 0.045). Caregiving burden and depressive symptoms were not correlated with BPV. After controlling for age and mean arterial pressure, the number of awakenings was significantly associated with increased systolic BPV-24 h (β = 0.194, p = 0.018) and systolic BPV-awake (β = 0.280, p = 0.002), respectively. CONCLUSIONS Caregivers' disrupted sleep may play a role in increased CVD risk. While these findings should be confirmed in large clinical studies, improving sleep quality would need to be considered in CVD prevention for caregivers.
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Affiliation(s)
- Soojung Ahn
- School of Nursing, Vanderbilt University, Nashville, TN, USA.
| | | | - Eric M Davis
- Division of Pulmonary and Critical Care, Department of Medicine, University of Virginia, Charlottesville, VA, USA
| | - Misook L Chung
- College of Nursing, University of Kentucky, Lexington, KY, USA
| | - Jennifer M Lobo
- Department of Public Health Sciences, University of Virginia, Charlottesville, VA, USA
| | - Jeongok G Logan
- School of Nursing, University of Virginia, Charlottesville, VA, USA
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Li Y, Guo Z, Cai C, Liu D, Kang Y, Liu P. The orexinergic system mediates the excitatory effects of caffeine on the arousal and sympathetic activity. Heliyon 2023; 9:e14170. [PMID: 36923861 PMCID: PMC10009538 DOI: 10.1016/j.heliyon.2023.e14170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/17/2023] [Accepted: 02/23/2023] [Indexed: 03/04/2023] Open
Abstract
Objective Caffeine is a non-selective adenosine receptor antagonist with pro-arousal and pro-sympathetic nervous system excitatory effects, and these pharmacological effects fit well with the physiological functions of orexin. The purpose of this study was to investigate the role of the orexinergic nervous system in the pharmacological effects of caffeine. Methods An animal model of sleepiness caused by adenosine accumulation was established by sleep deprivation, and caffeine's effects on the spontaneous activity and sympathetic nervous system of the model animals were evaluated by using the open-field experiment and gastrointestinal peristaltic observation, respectively, and the intervention of orexin receptor antagonists on the pharmacological effects of caffeine was also observed. Results Mice with 8 h of sleep deprivation showed a significant decrease in spontaneous activity and a significant increase in gastrointestinal push distance. After caffeine intervention, the spontaneous activities of sleep-deprived mice significantly increased and gastrointestinal peristalsis significantly decreased dose-dependent, while orexin receptors antagonist blocked the pro-arousal and inhibitory gastrointestinal peristalsis effects of caffeine on sleep-deprived mice. Conclusions Orexinergic nervous system mediated caffeine's excitatory effects on the pro-arousal and pro-sympathetic nervous systems. Orexin is likely to be an important performer in the pharmacological effects of caffeine.
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Affiliation(s)
- Yan Li
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, 225009, China.,Department of Traditional Chinese Medicine, Affiliated Hospital of Yangzhou University, Yangzhou, 225012, China
| | - Zhixuan Guo
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, 225009, China
| | - Chenxi Cai
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, 225009, China
| | - Danni Liu
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, 225009, China
| | - Yin Kang
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, 225009, China
| | - Pengfei Liu
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, 225009, China
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11
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Kim T, Kang J. Relationship between obstructive sleep apnea, insulin resistance, and metabolic syndrome: a nationwide population-based survey. Endocr J 2023; 70:107-119. [PMID: 36171092 DOI: 10.1507/endocrj.ej22-0280] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
We aimed to identify the association between obstructive sleep apnea (OSA), insulin resistance (IR), and metabolic syndrome (MetS) in a nationwide population-based sample. A total of 7,900 adults with information on the STOP-Bang score and MetS (3,341 men and 4,469 women) were identified from the dataset of the Korea National Health and Nutrition Examination Survey 2019-2020. The association between OSA, IR, MetS, and its components was estimated using complex sample logistic regression analysis with adjustments for age, body mass index, residence, smoking status, alcohol consumption, household income, education, and the presence of diabetes. Participants with a high OSA score were more likely to have IR (odds ratio [OR] 2.78, 95% confidence interval [CI] 1.96-3.95 in men and OR 2.64, 95% CI 0.55-12.80 in women), MetS (OR 6.05, 95% CI 4.23-8.69 in men and OR 4.20, 95% CI 1.23-15.70 in women), and components of MetS, compared to individuals with a low OSA score. Compared to premenopausal women, postmenopausal women had a more intense association between OSA and IR (OR 1.78, 95% CI 0.13-24.43 for premenopausal women and OR 3.64, 95% CI 0.60-22.28 for postmenopausal women) and MetS (OR 2.58, 95% CI 0.23-29.55 for premenopausal women and OR 5.36, 95% CI 1.42-20.21 for postmenopausal women). OSA was associated with abdominal obesity and hypertension in premenopausal women, while all components of MetS were associated with OSA in postmenopausal women. Further studies are necessary to elucidate the underlying mechanisms of these findings.
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Affiliation(s)
- Taeyun Kim
- Department of Internal Medicine, The Armed Forces Goyang Hospital, Goyang, Republic of Korea
| | - Jihun Kang
- Department of Family Medicine, Kosin University College of Medicine, Kosin University Gospel Hospital, Busan, Republic of Korea
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12
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Li C, Shang S, Liang W. Sleep and risk of hypertension in general American adults: the National Health and Nutrition Examination Surveys (2015-2018). J Hypertens 2023; 41:63-73. [PMID: 36129105 DOI: 10.1097/hjh.0000000000003299] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVE The purpose of research is to investigate the associations of sleep factors separately and jointly with risk of hypertension. METHODS The National Health and Nutrition Examination Surveys (NHANES) is a nationally representative survey. Participants aged over 20 years with complete and credible data from the NHANES 2015-2016 and 2017-2018 waves were included. Hypertension was assessed based on self-report medical diagnoses, or antihypertensive medication use, or systolic blood pressure ≥140 mmHg and/or diastolic blood pressure ≥90 mmHg. Sleep information (sleep duration, trouble sleeping, daytime sleepiness, self-reported snoring and sleep-related breathing issue) was obtained from household interview. RESULTS Of 7426 participants, the mean (standard deviation) age was 48.0 (17.3) years, 3845 (51.8%) were females. The prevalence of hypertension was 32.8%, and lower in those with 7-9 h sleep, no trouble sleeping, no excessive daytime sleepiness, no snoring or sleep apnea symptoms, decreased as the quantity of healthy sleep factors increased. The self-reported short sleep (odds ratio [OR]: 1.25, 95% confidence interval [CI]: 1.02-1.54, P = 0.032), trouble sleeping (OR: 1.53, 95% CI: 1.20 to 1.95, P = 0.001), excessive daytime sleepiness (OR: 1.17, 95% CI: 1.01-1.35, P = 0.041) and sleep apnea symptoms (OR: 1.33, 95% CI: 1.10-1.61, P = 0.004) were associated with 25%, 53%, 17% and 33% increased risk of hypertension, respectively. Participants with a poor sleep pattern was associated with higher hypertension risk (OR: 2.47, 95% CI: 1.90-3.22, P < 0.001). CONCLUSION Sleep behaviors were cross-sectionally associated with a considerably higher hypertension risk.
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Affiliation(s)
- Chunnan Li
- Vanke School of Public Health
- Institute for Healthy China, Tsinghua University
- School of Nursing, Peking University, Haidian District, Beijing, China
| | - Shaomei Shang
- School of Nursing, Peking University, Haidian District, Beijing, China
| | - Wannian Liang
- Vanke School of Public Health
- Institute for Healthy China, Tsinghua University
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13
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Ukraintseva YV, Soloveva AK. [The phenomenon of awakening from sleep and underlying neurophysiological and autonomic mechanisms]. Zh Nevrol Psikhiatr Im S S Korsakova 2023; 123:21-27. [PMID: 37275994 DOI: 10.17116/jnevro202312305221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Current research has shown that sleep is not a global process evenly covering the entire brain. The heterogeneity of wakefulness levels in different parts of the brain and differences in their activation thresholds are especially pronounced during the transitions between sleep and wakefulness. During awakening, subcortical brain structures activate first, followed by sensory and motor cortical regions, whereas the associative cortex wakes up much later. Awakening, unlike falling asleep, is not a smooth process. It begins with a short-term sharp activation of the autonomic nervous system and some wake-promoting brain regions. The amplitude of this activity burst is out of proportion to obvious physiological needs and exceeds that observed in later periods of quiet wakefulness. The review discusses the similarities and differences between awakening from sleep and hibernation in hibernating rodents. Data on some clinical consequences of impaired awakening mechanisms are also provided.
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Affiliation(s)
- Yu V Ukraintseva
- Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Science, Moscow, Russia
- Institute of Biomedical Problems of the Russian Academy of Science, Moscow, Russia
| | - A K Soloveva
- Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Science, Moscow, Russia
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14
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Obstructive Sleep Apnea, Circadian Clock Disruption, and Metabolic Consequences. Metabolites 2022; 13:metabo13010060. [PMID: 36676985 PMCID: PMC9863434 DOI: 10.3390/metabo13010060] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 12/26/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
Obstructive sleep apnea (OSA) is a chronic disorder characterized by recurrent episodes of apnea and hypopnea during sleep. It is associated with various cardiovascular and metabolic complications, including type 2 diabetes mellitus (T2DM) and obesity. Many pathways can be responsible for T2DM development in OSA patients, e.g., those related to HIF-1 and SIRT1 expression. Moreover, epigenetic mechanisms, such as miRNA181a or miRNA199, are postulated to play a pivotal role in this link. It has been proven that OSA increases the occurrence of circadian clock disruption, which is also a risk factor for metabolic disease development. Circadian clock disruption impairs the metabolism of glucose, lipids, and the secretion of bile acids. Therefore, OSA-induced circadian clock disruption may be a potential, complex, underlying pathway involved in developing and exacerbating metabolic diseases among OSA patients. The current paper summarizes the available information pertaining to the relationship between OSA and circadian clock disruption in the context of potential mechanisms leading to metabolic disorders.
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15
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Bigalke JA, Shan Z, Carter JR. Orexin, Sleep, Sympathetic Neural Activity, and Cardiovascular Function. Hypertension 2022; 79:2643-2655. [PMID: 36148653 PMCID: PMC9649879 DOI: 10.1161/hypertensionaha.122.19796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Inadequate sleep duration and quality are associated with reduced cardiovascular health and increased mortality. Experimental evidence points to the sympathetic nervous system as a key mediator in the observed relationship between poor sleep and cardiovascular dysfunction. However, brain mechanisms underpinning the impaired sympathetic function associated with poor sleep remain unclear. Recent evidence suggests the central orexin system, particularly orexins A and B and their receptors, have a key regulatory role for sleep in animal and human models. While orexin system activity has been observed to significantly impact sympathetic regulation in animals, the extension of these findings to humans has been difficult due to an inability to directly assess orexin system activity in humans. However, direct measures of sympathetic activity in populations with narcolepsy and chronic insomnia, 2 sleep disorders associated with deficient and excessive orexin neural activity, have allowed indirect assessment of the relationships between orexin, sleep, and sympathetic regulation. Further, the recent pharmaceutical development of dual orexin receptor antagonists for use in clinical insomnia populations offers an unprecedented opportunity to examine the mechanistic role of orexin in sleep and cardiovascular health in humans. The current review assesses the role of orexin in both sleep and sympathetic regulation from a translational perspective, spanning animal and human studies. The review concludes with future research directions necessary to fully elucidate the mechanistic role for orexin in sleep and sympathetic regulation in humans.
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Affiliation(s)
- Jeremy A. Bigalke
- Department of Health and Human Development, Montana State University, Bozeman, Montana
- Department of Psychology, Montana State University, Bozeman, Montana
| | - Zhiying Shan
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan
| | - Jason R. Carter
- Department of Health and Human Development, Montana State University, Bozeman, Montana
- Department of Psychology, Montana State University, Bozeman, Montana
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16
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Ruviaro Tuleski GL, Silveira MF, Bastos RF, Pscheidt MJGR, Prieto WDS, Sousa MG. Behavioral and cardiovascular effects of a single dose of gabapentin or melatonin in cats: a randomized, double-blind, placebo-controlled trial. J Feline Med Surg 2022; 24:e524-e534. [PMID: 36350565 PMCID: PMC10812368 DOI: 10.1177/1098612x221124359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES The aim of this study was to verify whether a single oral dose of gabapentin (100 mg) or melatonin (3 mg) given 60 mins before a cardiac evaluation would reduce anxiety without interfering with heart rate (HR), systemic blood pressure (SBP), electrocardiogram (ECG) and echocardiographic indexes. METHODS Seventy-five client-owned healthy cats underwent two sets of cardiac assessments 60 mins apart, randomly divided into gabapentin, melatonin and placebo groups. The interval between treatment and the second ECG and SBP measurement was 60 mins, and 70 mins for echocardiography. A compliance score (CS) classified the behavior, focusing on the ease of handling. RESULTS Most variables did not change between the examinations. The placebo group showed more significant changes (SBP, tricuspid annular plane systolic excursion, HR during echocardiography, aortic flow velocity, S' wave from lateral mitral annulus), but they were not considered to be hemodynamically relevant. Gabapentin and melatonin significantly increased the cats' compliance without interfering with cardiac assessment. Eight cats presented with mild sedation, seven after gabapentin and one after melatonin. No major side effects were observed. CONCLUSIONS AND RELEVANCE Gabapentin tranquilized the cats when it was given 60 mins prior to ECG and SBP measurement, and 70 mins prior to echocardiography, without interfering with systolic echocardiographic indexes. Melatonin also decreased the CS, but without sedation in most cases. The waiting period may have relaxed the cats in the placebo group, resulting in lower SBP measurements. However, this tranquility did not last as some echocardiographic changes signaled a sympathetic predominance.
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Affiliation(s)
- Giovana Lais Ruviaro Tuleski
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | - Matheus Folgearini Silveira
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | - Rodrigo Franco Bastos
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | | | - Wiliam da Silva Prieto
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | - Marlos G Sousa
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
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17
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Su D, Luo J, Ge J, Liu Y, Jin C, Xu P, Zhang R, Zhu G, Yang M, Ai Z, Song Y. Raw and Wine Processed Schisandra chinensis Regulate NREM-Sleep and Alleviate Cardiovascular Dysfunction Associated with Insomnia by Modulating HPA Axis. PLANTA MEDICA 2022; 88:1311-1324. [PMID: 34911135 DOI: 10.1055/a-1721-4971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Clinical studies have shown that insomnia and anxiety are usually accompanied by cardiovascular dysfunction. In traditional Chinese medicine, Schisandra chinensis (SC) and wine processed Schisandra chinensis (WSC) are mainly used for the treatment of dysphoria, palpitation and insomnia. However, little attention was paid to its mechanism. In this study, we monitored the effect of SC and WSC on the nervous system and cardiovascular system of free-moving rats in the real-time. Our results show that SC and WSC can alleviate cardiovascular dysfunction while promoting sleep, and we further explored their potential mechanisms. HPLC-QTOF-MS was used for the quality control of chemical components in SC and WSC. Data sciences international (DSI) physiological telemetry system was applied to collect the electroencephalogram (EEG), electrocardiogram (ECG) and other parameters of free-moving rats to understand the effects of long-term intake of SC and WSC on rats. The content of Cortisol (CORT), neurotransmitters and amino acids in rat pituitary and hypothalamus were analyzed by UPLC-MS to determine the activity of HPA axis. The expression of melatonin receptor MT1 was analyzed by immunofluorescence technique. Our results suggested that SC and WSC may play the role of promoting sleep by increasing the expression level of melatonin receptor MT1 in hypothalamus, and modulate the activity of HPA axis by regulating the levels of the related neurotransmitters and amino acid, so as to improve the abnormal cardiovascular system of rats. This study may provide theoretical support for explicating the advantages of SC and other phytomedicines in the treatment of insomnia.
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Affiliation(s)
- Dan Su
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Jian Luo
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Junqi Ge
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Yali Liu
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Chen Jin
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Pengfei Xu
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Ruowen Zhang
- Shenzhen Honsan Health Industry Group, Shenzhen, China
| | - Genhua Zhu
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Ming Yang
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Zhifu Ai
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Yonggui Song
- Key Laboratory of depression animal model based on TCM syndrome, Jiangxi Administration of traditional Chinese Medicine, Key Laboratory of TCM for prevention and treatment of brain diseases with cognitive impairment, Jiangxi Province, Jiangxi University of Chinese Medicine, Nanchang, China
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18
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Lu M, Yu W, Wang Z, Huang Z. Association between Arousals during Sleep and Subclinical Coronary Atherosclerosis in Patients with Obstructive Sleep Apnea. Brain Sci 2022; 12:brainsci12101362. [PMID: 36291296 PMCID: PMC9599630 DOI: 10.3390/brainsci12101362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 11/16/2022] Open
Abstract
(1) Aim: We aim to evaluate the association between arousals during sleep and subclinical coronary atherosclerosis detected by coronary computed tomography angiography (CTA) in patients with obstructive sleep apnea (OSA). (2) Methods: This was a cross-sectional study. Consecutive newly diagnosed OSA patients, who underwent coronary CTA examinations within 3 months of the sleep study, were eligible. We used the arousal index (ArI) derived from polysomnography to assess arousals during sleep and a semi-automated plaque quantification software to characterize and quantify the subclinical coronary atherosclerosis. Multiple regression models were used to evaluate the associations of the ArI with the coronary atherosclerotic plaque presence, volume, and composition. (3) Results: A total of 99 patients with OSA were included in the study. In the multivariable models, patients with a high ArI (ArI > 32.2 events/h) were more likely to have coronary plaques compared to those with a low ArI (ArI ≤ 32.2 events/h) (OR: 3.29 [95% CI: 1.284 to 8.427], p = 0.013). Furthermore, the ArI exhibited significant associations with total (β = 0.015), noncalcified (β = 0.015), and low-attenuation (β = 0.012) coronary plaque volume after accounting for established risk factors (p = 0.008, 0.004, and 0.002, respectively). However, no association between the ArI and calcified plaque volume was found. (4) Conclusion: Repetitive arousals during sleep are associated with an increased coronary plaque burden in patients with OSA, which remained robust after adjusting for multiple established cardiovascular risk factors.
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Affiliation(s)
- Mi Lu
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing 100005, China
| | - Wei Yu
- Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Zhenjia Wang
- Department of Radiology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing 100010, China
- Correspondence: (Z.W.); (Z.H.); Tel.: +86-13691224072 (Z.W.)
| | - Zhigang Huang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing 100005, China
- Correspondence: (Z.W.); (Z.H.); Tel.: +86-13691224072 (Z.W.)
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Li YE, Ren J. Association between obstructive sleep apnea and cardiovascular diseases. Acta Biochim Biophys Sin (Shanghai) 2022; 54:882-892. [PMID: 35838200 PMCID: PMC9828315 DOI: 10.3724/abbs.2022084] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Obstructive sleep apnea (OSA) is a common respiratory disorder characterized by partial obstruction of upper respiratory tract and repetitive cessation of breathing during sleep. The etiology behind OSA is associated with the occurrence of intermittent hypoxemia, recurrent arousals and intrathoracic pressure swings. These contributing factors may turn on various signaling mechanisms including elevated sympathetic tone, oxidative stress, inflammation, endothelial dysfunction, cardiovascular variability, abnormal coagulation and metabolic defect ( e.g., insulin resistance, leptin resistance and altered hepatic metabolism). Given its close tie with major cardiovascular risk factors, OSA is commonly linked to the pathogenesis of a wide array of cardiovascular diseases (CVDs) including hypertension, heart failure, arrhythmias, coronary artery disease, stroke, cerebrovascular disease and pulmonary hypertension (PH). The current standard treatment for OSA using adequate nasal continuous positive airway pressure (CPAP) confers a significant reduction in cardiovascular morbidity. Nonetheless, despite the availability of effective therapy, patients with CVDs are still deemed highly vulnerable to OSA and related adverse clinical outcomes. A better understanding of the etiology of OSA along with early diagnosis should be essential for this undertreated disorder in the clinical setting.
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Affiliation(s)
- Yiran E. Li
- Department of CardiologyZhongshan HospitalFudan University; Shanghai Institute of Cardiovascular DiseasesShanghai200032China
| | - Jun Ren
- Department of CardiologyZhongshan HospitalFudan University; Shanghai Institute of Cardiovascular DiseasesShanghai200032China,Department of Laboratory Medicine and PathologyUniversity of WashingtonSeattleWA98195USA,Correspondence address. Tel: +86-21-64041990; E-mail:
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Pundir M, Papagerakis S, De Rosa MC, Chronis N, Kurabayashi K, Abdulmawjood S, Prince MEP, Lobanova L, Chen X, Papagerakis P. Emerging biotechnologies for evaluating disruption of stress, sleep, and circadian rhythm mechanism using aptamer-based detection of salivary biomarkers. Biotechnol Adv 2022; 59:107961. [DOI: 10.1016/j.biotechadv.2022.107961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/30/2022] [Accepted: 04/09/2022] [Indexed: 12/26/2022]
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21
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Majeed H, Floras JS. Warmer summer nocturnal surface air temperatures and cardiovascular disease death risk: a population-based study. BMJ Open 2022; 12:e056806. [PMID: 35346980 PMCID: PMC8968994 DOI: 10.1136/bmjopen-2021-056806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND In recent summers, some populous mid-latitude to high-latitude regions have experienced greater heat intensity, more at night than by day. Such warming has been associated with increased cause-specific adult mortality. Sex-specific and age-specific associations between summer nocturnal surface air temperatures (SAT) and cardiovascular disease (CVD) deaths have yet to be established. METHODS A monthly time series analysis (June-July, 2001-2015) was performed on sex-specific CVD deaths in England and Wales of adults aged 60-64 and 65-69 years. Using negative binomial regression with autocorrelative residuals, associations between summer (June-July) nocturnal SAT anomalies (primary exposure) and CVD death rates (outcome) were computed, controlling for key covariates. To explore external validity, similar associations with respect to CVD death in King County, Washington, USA, also were calculated, but only for men aged 60-64 and 65-69 years. Results are reported as incidence rate ratios. RESULTS From 2001 to 2015, within these specific cohorts, 39 912 CVD deaths (68.9% men) were recorded in England and Wales and 488 deaths in King County. In England and Wales, after controlling for covariates, a 1°C rise in anomalous summer nocturnal SAT associated significantly with a 3.1% (95% CI 0.3% to 5.9%) increased risk of CVD mortality among men aged 60-64, but not older men or either women age groups. In King County, after controlling for covariates, a 1°C rise associated significantly with a 4.8% (95% CI 1.7% to 8.1%) increased risk of CVD mortality among those <65 years but not older men. CONCLUSION In two mid-latitude regions, warmer summer nights are accompanied by an increased risk of death from CVD among men aged 60-64 years.
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Affiliation(s)
- Haris Majeed
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - John S Floras
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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22
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Abstract
SignificanceAmbient nighttime light exposure is implicated as a risk factor for adverse health outcomes, including cardiometabolic disease. However, the effects of nighttime light exposure during sleep on cardiometabolic outcomes and the related mechanisms are unclear. This laboratory study shows that, in healthy adults, one night of moderate (100 lx) light exposure during sleep increases nighttime heart rate, decreases heart rate variability (higher sympathovagal balance), and increases next-morning insulin resistance when compared to sleep in a dimly lit (<3 lx) environment. Moreover, a positive relationship between higher sympathovagal balance and insulin levels suggests that sympathetic activation may play a role in the observed light-induced changes in insulin sensitivity.
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Wang Y, Han Z, Wang Y, Yan Y, Pan Z, Zhu H, Li H, Tao C, Liu P, Wang Y, Tang C, Jin H, Du J. Risk factors of sitting-induced tachycardia syndrome in children and adolescents. PLoS One 2022; 17:e0265364. [PMID: 35303039 PMCID: PMC8932569 DOI: 10.1371/journal.pone.0265364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 03/01/2022] [Indexed: 11/19/2022] Open
Abstract
Background The study was designed to explore the risk factors for sitting-induced tachycardia syndrome (STS) in children and adolescents. Methods and results In this case-control study, 46 children with STS and 184 healthy children and adolescents were recruited. Demographic characteristics, lifestyle habits, allergy history, and family history were investigated using a questionnaire. The changes in heart rate and blood pressure from supine to sitting were monitored using a sitting test. The possible differences between STS patients and healthy children were analyzed using univariate analysis. Logistic regression analysis was used to explore the independent risk factors for STS. Univariate analysis showed that the daily sleeping time of the STS children were significantly shorter than that of the control group [(8.8 ± 1.2) hours/day vs. (9.3 ± 1.0) hours/day, P = 0.009], and the proportion of positive family history of syncope in the STS patients was higher than the controls (4/42 vs. 3/181, P = 0.044). Multivariate logistic regression studies showed that reduced daily sleeping time was an independent risk factor of STS in children (P = 0.006). Furthermore, when daily sleeping time was prolonged by 1 h, the risk of STS was decreased by 37.3%. Conclusion Reduced daily sleeping was an independent risk factor for STS in children and adolescents.
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Affiliation(s)
- Yuanyuan Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Zhenhui Han
- Department of Cardiology, Children’s Hospital of Kaifeng, Henan, China
| | - Yaru Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yongqiang Yan
- Department of Cardiology, Children’s Hospital of Kaifeng, Henan, China
| | - Zhitao Pan
- Department of Cardiology, Children’s Hospital of Kaifeng, Henan, China
| | - Hanwen Zhu
- Department of Pediatric Surgery, Children’s Hospital of Kaifeng, Henan, China
| | - Hongxia Li
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Chunyan Tao
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Ping Liu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yuli Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Chaoshu Tang
- Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, China
- Department of Physiology and Pathophysiology, Health Science Centre, Peking University, Beijing, China
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, China
- * E-mail: (JD); (HJ)
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, China
- Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, China
- * E-mail: (JD); (HJ)
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Greenlund IM, Carter JR. Sympathetic neural responses to sleep disorders and insufficiencies. Am J Physiol Heart Circ Physiol 2022; 322:H337-H349. [PMID: 34995163 PMCID: PMC8836729 DOI: 10.1152/ajpheart.00590.2021] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Short sleep duration and poor sleep quality are associated with cardiovascular risk, and sympathetic nervous system (SNS) dysfunction appears to be a key contributor. The present review will characterize sympathetic function across several sleep disorders and insufficiencies in humans, including sleep deprivation, insomnia, narcolepsy, and obstructive sleep apnea (OSA). We will focus on direct assessments of sympathetic activation, e.g., plasma norepinephrine and muscle sympathetic nerve activity, but include heart rate variability (HRV) when direct assessments are lacking. The review also highlights sex as a key biological variable. Experimental models of total sleep deprivation and sleep restriction are converging to support several epidemiological studies reporting an association between short sleep duration and hypertension, especially in women. A systemic increase of SNS activity via plasma norepinephrine is present with insomnia and has also been confirmed with direct, regionally specific evidence from microneurographic studies. Narcolepsy is characterized by autonomic dysfunction via both HRV and microneurographic studies but with opposing conclusions regarding SNS activation. Robust sympathoexcitation is well documented in OSA and is related to baroreflex and chemoreflex dysfunction. Treatment of OSA with continuous positive airway pressure results in sympathoinhibition. In summary, sleep disorders and insufficiencies are often characterized by sympathoexcitation and/or sympathetic/baroreflex dysfunction, with several studies suggesting women may be at heightened risk.
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Affiliation(s)
- Ian M. Greenlund
- 1Department of Health and Human Development, Montana State University, Bozeman, Montana,2Department of Psychology, Montana State University, Bozeman, Montana
| | - Jason R. Carter
- 1Department of Health and Human Development, Montana State University, Bozeman, Montana,2Department of Psychology, Montana State University, Bozeman, Montana
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Kim H, Jung HR, Kim JB, Kim DJ. Autonomic Dysfunction in Sleep Disorders: From Neurobiological Basis to Potential Therapeutic Approaches. J Clin Neurol 2022; 18:140-151. [PMID: 35274834 PMCID: PMC8926769 DOI: 10.3988/jcn.2022.18.2.140] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/20/2021] [Accepted: 12/20/2021] [Indexed: 11/25/2022] Open
Abstract
Sleep disorder has been portrayed as merely a common dissatisfaction with sleep quality and quantity. However, sleep disorder is actually a medical condition characterized by inconsistent sleep patterns that interfere with emotional dynamics, cognitive functioning, and even physical performance. This is consistent with sleep abnormalities being more common in patients with autonomic dysfunction than in the general population. The autonomic nervous system coordinates various visceral functions ranging from respiration to neuroendocrine secretion in order to maintain homeostasis of the body. Because the cell population and efferent signals involved in autonomic regulation are spatially adjacent to those that regulate the sleep-wake system, sleep architecture and autonomic coordination exert effects on each other, suggesting the presence of a bidirectional relationship in addition to shared pathology. The primary goal of this review is to highlight the bidirectional and shared relationship between sleep and autonomic regulation. It also introduces the effects of autonomic dysfunction on insomnia, breathing disorders, central disorders of hypersomnolence, parasomnias, and movement disorders. This information will assist clinicians in determining how neuromodulation can have the greatest therapeutic effects in patients with sleep disorders.
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Affiliation(s)
- Hakseung Kim
- Department of Brain and Cognitive Engineering, Korea University, Seoul, Korea
| | - Hee Ra Jung
- Department of Psychological and Brain Sciences, Washington University in St. Louis, St. Louis, MO, USA
| | - Jung Bin Kim
- Department of Neurology, Korea University College of Medicine, Seoul, Korea
| | - Dong-Joo Kim
- Department of Brain and Cognitive Engineering, Korea University, Seoul, Korea
- Department of Neurology, Korea University College of Medicine, Seoul, Korea
- Department of Artificial Intelligence, Korea University, Seoul, Korea
- NeuroTx, Co., Ltd., Seoul, Korea
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26
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Dos Santos RR, da Silva TM, Silva LEV, Eckeli AL, Salgado HC, Fazan R. Correlation between heart rate variability and polysomnography-derived scores of obstructive sleep apnea. FRONTIERS IN NETWORK PHYSIOLOGY 2022; 2:958550. [PMID: 36926076 PMCID: PMC10013048 DOI: 10.3389/fnetp.2022.958550] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 08/12/2022] [Indexed: 11/13/2022]
Abstract
Obstructive sleep apnea (OSA) is one of the most common sleep disorders and affects nearly a billion people worldwide. Furthermore, it is estimated that many patients with OSA are underdiagnosed, which contributes to the development of comorbidities, such as cardiac autonomic imbalance, leading to high cardiac risk. Heart rate variability (HRV) is a non-invasive, widely used approach to evaluating neural control of the heart. This study evaluates the relationship between HRV indices and the presence and severity of OSA. We hypothesize that HRV, especially the nonlinear methods, can serve as an easy-to-collect marker for OSA early risk stratification. Polysomnography (PSG) exams of 157 patients were classified into four groups: OSA-free (N = 26), OSA-mild (N = 39), OSA-moderate (N = 37), and OSA-severe (N = 55). The electrocardiogram was extracted from the PSG recordings, and a 15-min beat-by-beat series of RR intervals were generated every hour during the first 6 h of sleep. Linear and nonlinear HRV approaches were employed to calculate 32 indices of HRV. Specifically, time- and frequency-domain, symbolic analysis, entropy measures, heart rate fragmentation, acceleration and deceleration capacities, asymmetry measures, and fractal analysis. Results with indices of sympathovagal balance provided support to reinforce previous knowledge that patients with OSA have sympathetic overactivity. Nonlinear indices showed that HRV dynamics of patients with OSA display a loss of physiologic complexity that could contribute to their higher risk of development of cardiovascular disease. Moreover, many HRV indices were found to be linked with clinical scores of PSG. Therefore, a complete set of HRV indices, especially the ones obtained by the nonlinear approaches, can bring valuable information about the presence and severity of OSA, suggesting that HRV can be helpful for in a quick diagnosis of OSA, and supporting early interventions that could potentially reduce the development of comorbidities.
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Affiliation(s)
- Rafael Rodrigues Dos Santos
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Thais Marques da Silva
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Luiz Eduardo Virgilio Silva
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Alan Luiz Eckeli
- Department of Neuroscience and Sciences of Behavior, Division of Neurology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Helio Cesar Salgado
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Rubens Fazan
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
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27
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Sympathetic activation by obstructive sleep apnea: a challenging 'off-label' meta-analysis. J Hypertens 2022; 40:30-32. [PMID: 34857703 DOI: 10.1097/hjh.0000000000003058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Biffi A, Quarti-Trevano F, Bonzani M, Seravalle G, Corrao G, Mancia G, Grassi G. Neuroadrenergic activation in obstructive sleep apnoea syndrome: a new selected meta-analysis - revisited. J Hypertens 2022; 40:15-23. [PMID: 34857700 PMCID: PMC10871617 DOI: 10.1097/hjh.0000000000003045] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 10/22/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND Neuroadrenegic overdrive occurs in obstructive sleep apnoea syndrome (OSAS). However, the small sample size of the microneurographic studies, heterogeneity of the patients examined, presence of comorbidities, represented major weaknesses not allowing to precisely define the main features of the phenomenon, particularly in nonobese patients. OBJECTIVE This meta-analysis detected 14 microneurographic studies based on muscle sympathetic nerve activity (MSNA) quantification in uncomplicated OSAS of different clinical severity. METHODS The evaluation was extended to the relationships of MSNA with heart rate, anthropometric and blood pressure values, metabolic variables, apnoea-hypopnea index and oxygen saturation. RESULTS MSNA is activated markedly and almost homogeneously between studies, showing a progressive increase from the healthy state to mild, moderate and severe OSAS (46.03, 48.32, 71.84, 69.27 bursts/100 heart beats). Of special interest are the findings that MSNA is significantly related to the apnoea-hypopnea index, a marker of OSAS severity (r = 0.55, P = 0.04) but not to BMI, as it occurs in OSAS associated with obesity, and heart rate is significantly and directly related to MSNA and apnoea-hypopnea index (r = 0.68 and r = 0.60, respectively P = 0.03 and P = 0.02), thus representing a surrogate marker of the sympathetic overdrive. CONCLUSION OSAS, even when uncomplicated by other cardiometabolic disease, displays a marked sympathetic activation, reflected by the MSNA and heart rate behaviour, becoming a target of therapeutic interventions aimed at exerting sympathomoderating effects, such as continuous positive airway pressure.
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Affiliation(s)
- Annalisa Biffi
- Department of Statistics and Quantitative Methods, University Milano-Bicocca
- National Centre for Healthcare Research and Pharmacoepidemiology
| | - Fosca Quarti-Trevano
- Clinica Medica, Department of Medicine and Surgery, University of Milano-Bicocca
| | - Matilde Bonzani
- National Centre for Healthcare Research and Pharmacoepidemiology
| | - Gino Seravalle
- Department of Statistics and Quantitative Methods, University Milano-Bicocca
| | - Giovanni Corrao
- National Centre for Healthcare Research and Pharmacoepidemiology
- Clinica Medica, Department of Medicine and Surgery, University of Milano-Bicocca
| | - Giuseppe Mancia
- Policlinico di Monza, Monza and University Milano-Bicocca, Milan, Italy
| | - Guido Grassi
- Department of Statistics and Quantitative Methods, University Milano-Bicocca
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29
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Martins FO, Conde SV. Gender Differences in the Context of Obstructive Sleep Apnea and Metabolic Diseases. Front Physiol 2022; 12:792633. [PMID: 34970158 PMCID: PMC8712658 DOI: 10.3389/fphys.2021.792633] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 11/17/2021] [Indexed: 11/13/2022] Open
Abstract
The relationship between obstructive sleep apnea (OSA) and endocrine and metabolic disease is unequivocal. OSA, which is characterized by intermittent hypoxia and sleep fragmentation, leads to and exacerbates obesity, metabolic syndrome, and type 2 diabetes (T2D) as well as endocrine disturbances, such as hypothyroidism and Cushing syndrome, among others. However, this relationship is bidirectional with endocrine and metabolic diseases being considered major risk factors for the development of OSA. For example, polycystic ovary syndrome (PCOS), one of the most common endocrine disorders in women of reproductive age, is significantly associated with OSA in adult patients. Several factors have been postulated to contribute to or be critical in the genesis of dysmetabolic states in OSA including the increase in sympathetic activation, the deregulation of the hypothalamus-pituitary axis, the generation of reactive oxygen species (ROS), insulin resistance, alteration in adipokines levels, and inflammation of the adipose tissue. However, probably the alterations in the hypothalamus-pituitary axis and the altered secretion of hormones from the peripheral endocrine glands could play a major role in the gender differences in the link between OSA-dysmetabolism. In fact, normal sleep is also different between men and women due to the physiologic differences between genders, with sex hormones such as progesterone, androgens, and estrogens, being also connected with breathing pathologies. Moreover, it is very well known that OSA is more prevalent among men than women, however the prevalence in women increases after menopause. At the same time, the step-rise in obesity and its comorbidities goes along with mounting evidence of clinically important sex and gender differences. Metabolic and cardiovascular diseases, seen as a men's illness for decades, presently are more common in women than in men and obesity has a higher association with insulin-resistance-related risk factors in women than in men. In this way, in the present manuscript, we will review the major findings on the overall mechanisms that connect OSA and dysmetabolism giving special attention to the specific regulation of this relationship in each gender. We will also detail the gender-specific effects of hormone replacement therapies on metabolic control and sleep apnea.
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Affiliation(s)
- Fátima O Martins
- Chronic Diseases Research Center (CEDOC), NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Sílvia V Conde
- Chronic Diseases Research Center (CEDOC), NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Lisboa, Portugal
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30
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Powell TA, Mysliwiec V, Brock MS, Morris MJ. OSA and cardiorespiratory fitness: a review. J Clin Sleep Med 2022; 18:279-288. [PMID: 34437054 PMCID: PMC8807904 DOI: 10.5664/jcsm.9628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The effects of untreated obstructive sleep apnea (OSA) on cardiopulmonary function remain unclear. Cardiorespiratory fitness (CRF), commonly reflected by VO2 max measured during cardiopulmonary exercise testing, has gained popularity in evaluating numerous cardiopulmonary conditions and may provide a novel means of identifying OSA patients with the most clinically significant disease. This emerging testing modality provides simultaneous assessment of respiratory and cardiovascular function with results helping uncover evidence of evolving pathology in either organ system. In this review, we highlight the current state of the literature in regard to OSA and CRF with a specific focus on changes in cardiovascular function that have been previously noted. While OSA does not appear to limit respiratory function during exercise, studies seem to suggest an abnormal cardiovascular exercise response in this population including decreased cardiac output, a blunted heart rate response (ie, chronotropic incompetence), and exaggerated blood pressure response. Surprisingly, despite these observed changes in the cardiovascular response to exercise, results involving VO2 max in OSA remain inconclusive. This is reflected by VO2 max studies involving middle-aged OSA patients showing both normal and reduced CRF. As prior studies have not extensively characterized oxygen desaturation burden, we propose that reductions in VO2 max may exist in OSA patients with only the most significant disease (as reflected by nocturnal hypoxia). Further characterizing this relationship remains important as some research suggests that positive airway pressure therapy or aerobic exercise may improve CRF in patients with OSA. In conclusion, while it likely that severe OSA, via an abnormal cardiovascular response to exercise, is associated with decreased CRF, further study is clearly warranted to include determining if OSA with decreased CRF is associated with increased morbidity or mortality. CITATION Powell TA, Mysliwiec V, Brock MS, Morris MJ. OSA and cardiorespiratory fitness: a review. J Clin Sleep Med. 2022;18(1):279-288.
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Affiliation(s)
- Tyler A. Powell
- Sleep Medicine Service, Wilford Hall Ambulatory Surgery Center, JBSA Lackland Air Force Base, Texas,Address correspondence to: Tyler A. Powell, MD, Sleep Medicine Service, Wilford Hall Ambulatory Service Center, JBSA Lackland Air Force Base, TX 78234; ,
| | - Vincent Mysliwiec
- Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Matthew S. Brock
- Sleep Medicine Service, Wilford Hall Ambulatory Surgery Center, JBSA Lackland Air Force Base, Texas
| | - Michael J. Morris
- Graduate Medical Education, Brooke Army Medical Center, JBSA Fort Sam Houston, Texas
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31
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Ren R, Zhang Y, Yang L, Somers VK, Covassin N, Tang X. Association Between Arousals During Sleep and Hypertension Among Patients With Obstructive Sleep Apnea. J Am Heart Assoc 2021; 11:e022141. [PMID: 34970921 PMCID: PMC9075207 DOI: 10.1161/jaha.121.022141] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background Sleep fragmentation induced by repetitive arousals is a hallmark of obstructive sleep apnea (OSA). Sleep fragmentation has been linked to hypertension in community‐based studies, but it is unclear if this association is manifest in OSA. We aimed to explore whether frequent arousals from sleep modify the relationship between OSA and prevalent hypertension. Methods and Results A total of 10 102 patients with OSA and 1614 primary snorers were included in the study. Hypertension was defined on either direct blood pressure measures or diagnosis by a physician. Spontaneous, respiratory, and movement arousals were derived by polysomnography. Logistic regression models were used to estimate the associations between arousals and prevalent hypertension in patients with OSA and primary snorers. For every 10‐unit increase of total arousal index, odds of hypertension significantly increased in both the total sample (odds ratio [OR], 1.08; 95% CI, 1.03–1.14; P=0.002) and patients with OSA (OR, 1.10; 95% CI, 1.04–1.16; P<0.001), but not in the primary snoring group. Total arousal index was significantly associated with systolic blood pressure and diastolic blood pressure in the total sample (β=0.05 and β=0.06; P<0.001) and in patients with (β=0.05 and β=0.06; P<0.01), but not in primary snorers. In addition, a greater influence of respiratory events with arousals than respiratory events without arousals on blood pressure in OSA was also noted. Results were independent of confounders, including apnea‐hypopnea index and nocturnal hypoxemia. Conclusions We conclude that repetitive arousals from sleep are independently associated with prevalent hypertension in patients with OSA.
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Affiliation(s)
- Rong Ren
- Department of Respiratory and Critical Care Medicine Sleep Medicine Center Translational Neuroscience Center State Key Laboratory West China HospitalSichuan University Chengdu China
| | - Ye Zhang
- Department of Respiratory and Critical Care Medicine Sleep Medicine Center Translational Neuroscience Center State Key Laboratory West China HospitalSichuan University Chengdu China
| | - Linghui Yang
- Department of Respiratory and Critical Care Medicine Sleep Medicine Center Translational Neuroscience Center State Key Laboratory West China HospitalSichuan University Chengdu China
| | - Virend K Somers
- Department of Cardiovascular Medicine Mayo Clinic Rochester MN
| | - Naima Covassin
- Department of Cardiovascular Medicine Mayo Clinic Rochester MN
| | - Xiangdong Tang
- Department of Respiratory and Critical Care Medicine Sleep Medicine Center Translational Neuroscience Center State Key Laboratory West China HospitalSichuan University Chengdu China
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32
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Bigalke JA, Carter JR. Sympathetic Neural Control in Humans with Anxiety-Related Disorders. Compr Physiol 2021; 12:3085-3117. [PMID: 34964121 DOI: 10.1002/cphy.c210027] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Numerous conceptual models are used to describe the dynamic responsiveness of physiological systems to environmental pressures, originating with Claude Bernard's milieu intérieur and extending to more recent models such as allostasis. The impact of stress and anxiety upon these regulatory processes has both basic science and clinical relevance, extending from the pioneering work of Hans Selye who advanced the concept that stress can significantly impact physiological health and function. Of particular interest within the current article, anxiety is independently associated with cardiovascular risk, yet mechanisms underlying these associations remain equivocal. This link between anxiety and cardiovascular risk is relevant given the high prevalence of anxiety in the general population, as well as its early age of onset. Chronically anxious populations, such as those with anxiety disorders (i.e., generalized anxiety disorder, panic disorder, specific phobias, etc.) offer a human model that interrogates the deleterious effects that chronic stress and allostatic load can have on the nervous system and cardiovascular function. Further, while many of these disorders do not appear to exhibit baseline alterations in sympathetic neural activity, reactivity to mental stress offers insights into applicable, real-world scenarios in which heightened sympathetic reactivity may predispose those individuals to elevated cardiovascular risk. This article also assesses behavioral and lifestyle modifications that have been shown to concurrently improve anxiety symptoms, as well as sympathetic control. Lastly, future directions of research will be discussed, with a focus on better integration of psychological factors within physiological studies examining anxiety and neural cardiovascular health. © 2022 American Physiological Society. Compr Physiol 12:1-33, 2022.
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Affiliation(s)
- Jeremy A Bigalke
- Department of Psychology, Montana State University, Bozeman, Montana, USA
| | - Jason R Carter
- Department of Psychology, Montana State University, Bozeman, Montana, USA.,Department of Health and Human Development, Montana State University, Bozeman, Montana, USA
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33
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Neuroadrenergic activation in obstructive sleep apnea syndrome: a systematic review and meta-analysis. J Hypertens 2021; 39:2281-2289. [PMID: 34620811 DOI: 10.1097/hjh.0000000000002934] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Neuroadrenergic overdrive occurs in obstructive sleep apnea syndrome (OSAS). However, the small sample size of the microneurographic studies, heterogeneity of the patients examined, presence of comorbidities, represented major weaknesses not allowing to precisely define the main features of the phenomenon, particularly in nonobese patients. OBJECTIVE This meta-analysis evaluated 850 participants recruited in 26 microneurographic studies, based on muscle sympathetic nerve activity (MSNA) quantification in uncomplicated OSAS of different clinical severity. METHODS The evaluation was extended to the relationships of MSNA with heart rate (HR), anthropometric and blood pressure (BP) values, metabolic variables, apnea-hypopnea index (AHI) and oxygen saturation. RESULTS MSNA is activated markedly and almost homogeneously between studies, showing a progressive increase from the healthy state to mild, moderate and severe OSAS (41.6, 48.3, 65.5 and 70.7 bursts/100 heart beats, respectively, P < 0.01). Of special interest are the findings that first, MSNA is significantly related to the AHI, a marker of OSAS severity (r = 0.55, P < 0.02) and O2 saturation but not to body weight and BMI, as it occurs in OSAS associated with obesity; and second, HR is significantly and directly related to MSNA and AHI (r = 0.56 and 0.46, P < 0.03 for both), thus representing a surrogate marker of the sympathetic overdrive. CONCLUSION OSAS, even when uncomplicated by other cardiometabolic disease, displays a marked sympathetic activation, reflected by the MSNA and HR behavior, becoming a target of therapeutic interventions aimed at exerting sympathomoderating effects, such as continuous positive airway pressure.
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34
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Guerrero G, Le Rolle V, Loiodice C, Amblard A, Pepin JL, Hernandez A. Modeling patient-specific desaturation patterns in sleep apnea. IEEE Trans Biomed Eng 2021; 69:1502-1511. [PMID: 34665719 DOI: 10.1109/tbme.2021.3121170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
OBJECTIVE The physiological mechanisms involved in cardio-respiratory responses to sleep apnea events are not yet fully elucidated. A model-based approach is proposed to analyse the acute desaturation response to obstructive apneas. METHODS An integrated model of cardio-respiratory interactions was proposed and parameters were identified, using an evolutionary algorithm, on a database composed of 107 obstructive apneas acquired from 10 patients (HYPNOS clinical study). Unsupervised clustering was applied to the identified parameters in order to characterize the phenotype of each response to obstructive apneas. RESULTS A close match was observed between simulated oxygen saturation (SaO2) and experimental SaO2 in all identifications (median RMSE = 1.3892%). Two clusters of parameters, associated with different dynamics related to sleep apnea and periodic breathing were obtained. CONCLUSION AND SIGNIFICANCE The proposed patient and event-specific model-based analysis provides understanding on specific desaturation patterns, consequent to apnea events, with potential applications for personalized diagnosis and treatment.
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35
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Wang Z, Liang X, Lu Y, Jiang T, Aji T, Aimulajiang K, Sun H, Zhang L, Zhou X, Tang B, Wen H. Insomnia Promotes Hepatic Steatosis in Rats Possibly by Mediating Sympathetic Overactivation. Front Physiol 2021; 12:734009. [PMID: 34630154 PMCID: PMC8497715 DOI: 10.3389/fphys.2021.734009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 08/27/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Insomnia is a widespread problem that can lead to the occurrence of other diseases and correlates closely with sympathetic nerve hyperactivation. Obesity-induced hepatic steatosis is mediated by sympathetic overactivation. However, it remains unclear whether insomnia may cause hepatic steatosis. The goal of this study was to preliminarily investigate whether insomnia caused hepatic steatosis in rats via sympathetic hyperactivation. Methods: A total of 32 Sprague-Dawley male rats were divided randomly into four groups: model, sympathetic denervation (Sd), estazolam, and control (eight rats/group). Model group received sustained sleep deprivation using the modified multiple platform method. In the Sd group, rats underwent sleep deprivation after receiving Sd by 6-hydroxydopamine (6-OHDA). Estazolam group: the rats concurrently received sleep deprivation and treatment with estazolam. The other eight rats housed in cages and kept in a comfortable environment were used as control. Blood samples were obtained for analysis of plasma lipids and hepatic function. Sympathetic hyperactivation-related indexes and hepatic steatosis in liver tissues were tested. Results: Liver enzymes, plasma lipid levels, and hepatic steatosis were elevated in insomnia rats, and sympathetic hyperactivation was found. Insomnia-induced hepatic steatosis was effectively lowered with pharmacological ablation of the hepatic sympathetic nerves. Furthermore, the treatment of insomnia with estazolam inhibited sympathetic activation and reduced hepatic steatosis. Conclusion: Sustained sleep deprivation-induced insomnia promotes hepatic steatosis in rats possibly by mediating sympathetic overactivation.
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Affiliation(s)
- Zongding Wang
- State Key Laboratory of Pathogenesis, Prevention, and Treatment of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China.,Hepatobiliary and Hydatid Disease Department, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Xiaoyan Liang
- Department of Pacing and Electrophysiology, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China.,Xinjiang Key Laboratory of Cardiac Electrophysiology and Cardiac Remodeling, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Yanmei Lu
- Department of Pacing and Electrophysiology, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China.,Xinjiang Key Laboratory of Cardiac Electrophysiology and Cardiac Remodeling, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Tiemin Jiang
- State Key Laboratory of Pathogenesis, Prevention, and Treatment of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China.,Hepatobiliary and Hydatid Disease Department, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Tuerganaili Aji
- State Key Laboratory of Pathogenesis, Prevention, and Treatment of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China.,Hepatobiliary and Hydatid Disease Department, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Kalibixiati Aimulajiang
- State Key Laboratory of Pathogenesis, Prevention, and Treatment of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Huaxin Sun
- Department of Pacing and Electrophysiology, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China.,Xinjiang Key Laboratory of Cardiac Electrophysiology and Cardiac Remodeling, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Ling Zhang
- Department of Pacing and Electrophysiology, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China.,Xinjiang Key Laboratory of Cardiac Electrophysiology and Cardiac Remodeling, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Xianhui Zhou
- Department of Pacing and Electrophysiology, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China.,Xinjiang Key Laboratory of Cardiac Electrophysiology and Cardiac Remodeling, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Baopeng Tang
- Department of Pacing and Electrophysiology, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China.,Xinjiang Key Laboratory of Cardiac Electrophysiology and Cardiac Remodeling, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Hao Wen
- State Key Laboratory of Pathogenesis, Prevention, and Treatment of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China.,Hepatobiliary and Hydatid Disease Department, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
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Floras JS. The 2021 Carl Ludwig Lecture. Unsympathetic autonomic regulation in heart failure: patient-inspired insights. Am J Physiol Regul Integr Comp Physiol 2021; 321:R338-R351. [PMID: 34259047 DOI: 10.1152/ajpregu.00143.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Defined as a structural or functional cardiac abnormality accompanied by symptoms, signs, or biomarkers of altered ventricular pressures or volumes, heart failure also is a state of autonomic disequilibrium. A large body of evidence affirms that autonomic disturbances are intrinsic to heart failure; basal or stimulated sympathetic nerve firing or neural norepinephrine (NE) release more often than not exceed homeostatic need, such that an initially adaptive adrenergic or vagal reflex response becomes maladaptive. The magnitude of such maladaptation predicts prognosis. This Ludwig lecture develops two theses: the elucidation and judiciously targeted amelioration of maladaptive autonomic disturbances offers opportunities to complement contemporary guideline-based heart failure therapy, and serendipitous single-participant insights, acquired in the course of experimental protocols with entirely different intent, can generate novel insight, inform mechanisms, and launch entirely new research directions. I précis six elements of our current synthesis of the causes and consequences of maladaptive sympathetic disequilibrium in heart failure, shaped by patient-inspired epiphanies: arterial baroreceptor reflex modulation, excitation stimulated by increased cardiac filling pressure, paradoxical muscle sympathetic activation as a peripheral neurogenic constraint on exercise capacity, renal sympathetic restraint of natriuresis, coexisting sleep apnea, and augmented chemoreceptor reflex sensitivity and then conclude by envisaging translational therapeutic opportunities.
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Affiliation(s)
- John S Floras
- University Health Network and Sinai Health Division of Cardiology, Toronto General Hospital Research Institute and Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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Taylor KS, Keir DA, Haruki N, Kimmerly DS, Millar PJ, Murai H, Floras JS. Comparison of Cortical Autonomic Network-Linked Sympathetic Excitation by Mueller Maneuvers and Breath-Holds in Subjects With and Without Obstructive Sleep Apnea. Front Physiol 2021; 12:678630. [PMID: 34122146 PMCID: PMC8188800 DOI: 10.3389/fphys.2021.678630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/16/2021] [Indexed: 11/15/2022] Open
Abstract
In healthy young volunteers, acquisition of blood oxygen level-dependent (BOLD) magnetic resonance (MR) and muscle sympathetic nerve (MSNA) signals during simulation of obstructive or central sleep apnea identified cortical cardiovascular autonomic regions in which the BOLD signal changed synchronously with acute noradrenergic excitation. In the present work, we tested the hypothesis that such Mueller maneuvers (MM) and breath-holds (BH) would elicit greater concomitant changes in mean efferent nerve firing and BOLD signal intensity in patients with moderate to severe obstructive sleep apnea (OSA) relative to age- and sex-matched individuals with no or only mild OSA (Apnea Hypopnea Index, AHI, <15 events/h). Forty-six participants, 24 with OSA [59 ± 8 years; AHI 31 ± 18 events/h (mean ± SD); seven women] and 22 without (58 ± 11 years; AHI 7 ± 4; nine women), performed a series of three MM and three BH, in randomly assigned order, twice: during continuous recording of MSNA from the right fibular nerve and, on a separate day, during T2∗-weighted echo planar functional MR imaging. MSNA at rest was greater in those with OSA (65 ± 19 vs. 48 ± 17 bursts per 100 heart beats; p < 0.01). MM and BH elicited similar heart rate, blood pressure, and MSNA responses in the two cohorts; group mean BOLD data were concordant, detecting no between-group differences in cortical autonomic region signal activities. The present findings do not support the concept that recurring episodes of cyclical apnea during sleep alter cortical or peripheral neural responsiveness to their simulation during wakefulness by volitional Mueller maneuvers or breath-holds.
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Affiliation(s)
- Keri S Taylor
- University Health Network and Mount Sinai Hospital Department of Medicine, Toronto General Hospital Research Institute and the Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Daniel A Keir
- University Health Network and Mount Sinai Hospital Department of Medicine, Toronto General Hospital Research Institute and the Department of Medicine, University of Toronto, Toronto, ON, Canada.,School of Kinesiology, The University of Western Ontario, London, ON, Canada
| | - Nobuhiko Haruki
- University Health Network and Mount Sinai Hospital Department of Medicine, Toronto General Hospital Research Institute and the Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Derek S Kimmerly
- University Health Network and Mount Sinai Hospital Department of Medicine, Toronto General Hospital Research Institute and the Department of Medicine, University of Toronto, Toronto, ON, Canada.,Division of Kinesiology, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Philip J Millar
- University Health Network and Mount Sinai Hospital Department of Medicine, Toronto General Hospital Research Institute and the Department of Medicine, University of Toronto, Toronto, ON, Canada.,Department of Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Hisayoshi Murai
- University Health Network and Mount Sinai Hospital Department of Medicine, Toronto General Hospital Research Institute and the Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - John S Floras
- University Health Network and Mount Sinai Hospital Department of Medicine, Toronto General Hospital Research Institute and the Department of Medicine, University of Toronto, Toronto, ON, Canada
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Floras JS. From Brain to Blood Vessel: Insights From Muscle Sympathetic Nerve Recordings: Arthur C. Corcoran Memorial Lecture 2020. Hypertension 2021; 77:1456-1468. [PMID: 33775112 DOI: 10.1161/hypertensionaha.121.16490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Multiunit recordings of postganglionic sympathetic outflow to muscle yield otherwise imperceptible insights into sympathetic neural modulation of human vascular resistance and blood pressure. This Corcoran Lecture will illustrate the utility of microneurography to investigate neurogenic cardiovascular regulation; review data concerning muscle sympathetic nerve activity of women and men with normal and high blood pressure; explore 2 concepts, central upregulation of muscle sympathetic outflow and cortical autonomic neuroplasticity; present sleep apnea as an imperfect model of neurogenic hypertension; and expose the paradox of sympathetic excitation without hypertension. In awake healthy normotensive individuals, resting muscle sympathetic nerve activity increases with age, sleep fragmentation, and obstructive apnea. Its magnitude is not signaled by heart rate. Age-related changes are nonlinear and differ by sex. In men, sympathetic nerve activity increases with age but without relation to their blood pressure, whereas in women, both rise concordantly after age 40. Mean values for muscle sympathetic nerve activity burst incidence are consistently higher in cohorts with hypertension than in matched normotensives, yet women's sympathetic nerve traffic can increase 3-fold between ages 30 and 70 without causing hypertension. Thus, increased sympathetic nerve activity may be necessary but is insufficient for primary hypertension. Moreover, its inhibition does not consistently decrease blood pressure. Despite a half-century of microneurographic research, large gaps remain in our understanding of the content of the sympathetic broadcast from brain to blood vessel and its specific individual consequences for circulatory regulation and cardiovascular, renal, and metabolic risk.
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Affiliation(s)
- John S Floras
- Sinai Health and University Health Network Division of Cardiology, Toronto General Hospital Research Institute, and the Department of Medicine, University of Toronto
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Dissanayake HU, Bin YS, Ucak S, de Chazal P, Sutherland K, Cistulli PA. Association between autonomic function and obstructive sleep apnea: A systematic review. Sleep Med Rev 2021; 57:101470. [PMID: 33839505 DOI: 10.1016/j.smrv.2021.101470] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/31/2021] [Accepted: 02/14/2021] [Indexed: 12/18/2022]
Abstract
Obstructive sleep apnea (OSA) is an independent risk factor for hypertension and cardiovascular disease. Effects of OSA on the autonomic nervous system may mediate this association. We performed a systematic literature review to determine the profile of autonomic function associated with OSA. Three electronic databases were searched for studies of OSA patients aged ≥18 years in which autonomic function was assessed. Studies comparing patients with and without OSA, or examining the association of OSA severity with changes in autonomic function were included. Seventy-one studies met the inclusion criteria and autonomic function has been assessed using a range of techniques. The profile of autonomic function found in OSA include increased sympathetic activity, reduced parasympathetic activity and less consistently found low heart rate variability. Altered autonomic function in OSA may explain the pathophysiology of increased cardiovascular risk. Evidence from intervention studies is required to determine if treatment improves autonomic function associated with OSA.
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Affiliation(s)
- Hasthi U Dissanayake
- Sleep Research Group, Charles Perkins Centre, The University of Sydney, Australia; Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Australia.
| | - Yu S Bin
- Sleep Research Group, Charles Perkins Centre, The University of Sydney, Australia; Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Australia
| | - Seren Ucak
- Sleep Research Group, Charles Perkins Centre, The University of Sydney, Australia; Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Australia
| | - Philip de Chazal
- Sleep Research Group, Charles Perkins Centre, The University of Sydney, Australia; School of Biomedical Engineering, University of Sydney, Sydney, NSW, 2006, Australia
| | - Kate Sutherland
- Sleep Research Group, Charles Perkins Centre, The University of Sydney, Australia; Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Australia; Centre for Sleep Health & Research, Department of Respiratory Medicine, Royal North Shore Hospital, Australia
| | - Peter A Cistulli
- Sleep Research Group, Charles Perkins Centre, The University of Sydney, Australia; Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Australia; Centre for Sleep Health & Research, Department of Respiratory Medicine, Royal North Shore Hospital, Australia
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40
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Steele AR, Berthelsen LF, Fraser GM, Phillips DB, Fuhr DP, Wong EYL, Stickland MK, Steinback CD. Blunted sympathetic neurovascular transduction is associated to the severity of obstructive sleep apnea. Clin Auton Res 2021; 31:443-451. [DOI: 10.1007/s10286-021-00784-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/28/2021] [Indexed: 01/09/2023]
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41
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Qin H, Steenbergen N, Glos M, Wessel N, Kraemer JF, Vaquerizo-Villar F, Penzel T. The Different Facets of Heart Rate Variability in Obstructive Sleep Apnea. Front Psychiatry 2021; 12:642333. [PMID: 34366907 PMCID: PMC8339263 DOI: 10.3389/fpsyt.2021.642333] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 06/14/2021] [Indexed: 12/15/2022] Open
Abstract
Obstructive sleep apnea (OSA), a heterogeneous and multifactorial sleep related breathing disorder with high prevalence, is a recognized risk factor for cardiovascular morbidity and mortality. Autonomic dysfunction leads to adverse cardiovascular outcomes in diverse pathways. Heart rate is a complex physiological process involving neurovisceral networks and relative regulatory mechanisms such as thermoregulation, renin-angiotensin-aldosterone mechanisms, and metabolic mechanisms. Heart rate variability (HRV) is considered as a reliable and non-invasive measure of autonomic modulation response and adaptation to endogenous and exogenous stimuli. HRV measures may add a new dimension to help understand the interplay between cardiac and nervous system involvement in OSA. The aim of this review is to introduce the various applications of HRV in different aspects of OSA to examine the impaired neuro-cardiac modulation. More specifically, the topics covered include: HRV time windows, sleep staging, arousal, sleepiness, hypoxia, mental illness, and mortality and morbidity. All of these aspects show pathways in the clinical implementation of HRV to screen, diagnose, classify, and predict patients as a reasonable and more convenient alternative to current measures.
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Affiliation(s)
- Hua Qin
- Interdisciplinary Center of Sleep Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | - Martin Glos
- Interdisciplinary Center of Sleep Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Niels Wessel
- Department of Physics, Humboldt Universität zu Berlin, Berlin, Germany
| | - Jan F Kraemer
- Department of Physics, Humboldt Universität zu Berlin, Berlin, Germany
| | - Fernando Vaquerizo-Villar
- Biomedical Engineering Group, Universidad de Valladolid, Valladolid, Spain.,Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina, Valladolid, Spain
| | - Thomas Penzel
- Interdisciplinary Center of Sleep Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Saratov State University, Russian Federation, Saratov, Russia
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Resano-Barrio MP, Arroyo-Espliguero R, Viana-Llamas MC, Mediano O. Obstructive Sleep Apnoea Syndrome: Continuous Positive Airway Pressure Therapy for Prevention of Cardiovascular Risk. Eur Cardiol 2020; 15:e65. [PMID: 33042228 PMCID: PMC7539148 DOI: 10.15420/ecr.2020.10] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 07/27/2020] [Indexed: 12/13/2022] Open
Abstract
Obstructive sleep apnoea (OSA) syndrome is characterised by the presence of apnoea or obstructive hypopnoea during sleep, accompanied by hypoxia. It is estimated that the syndrome affects approximately 10% of men and 15% of women. Diagnosis and treatment rates have increased in recent years, but the condition remains undiagnosed in a high percentage of patients. Recent evidence suggests that OSA may increase the risk of cardiovascular disease. The relationship between OSA and cardiovascular disease can be explained, at least in part, by the coexistence of cardiovascular risk factors in the two pathologies, such as age, overweight, smoking and sedentary lifestyle. However, OSA has been independently associated with the risk of developing hypertension, cerebrovascular disease, ischaemic heart disease, heart failure and arrhythmias. Clinical trials that have evaluated the efficacy of continuous positive airway pressure (CPAP) treatment in primary and secondary cardiovascular prevention have not demonstrated a significant reduction in the incidence or recurrence of cardiovascular events. This article analyses the relationship between OSA and cardiovascular risk and discusses recent clinical trials on the efficacy of CPAP in primary and secondary cardiovascular prevention.
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Affiliation(s)
| | | | | | - Olga Mediano
- Department of Respiratory Medicine, University Hospital Guadalajara, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES) Madrid, Spain.,Department of Medicine, University of Alcalá Alcalá de Henares, Madrid, Spain
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43
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Leary EB, Zinchuk A, Stone KL, Mehra R. Update in Sleep 2019. Am J Respir Crit Care Med 2020; 201:1473-1479. [PMID: 32293912 DOI: 10.1164/rccm.202003-0586up] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Eileen B Leary
- Center for Sleep Sciences and Medicine, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, California
| | - Andrey Zinchuk
- Section of Pulmonary, Critical Care and Sleep Medicine, Internal Medicine Department, School of Medicine, Yale University, New Haven, Connecticut
| | - Katie L Stone
- California Pacific Medical Center Research Institute, San Francisco, California
| | - Reena Mehra
- Sleep Disorders Center, Neurological Institute.,Respiratory Institute.,Heart, Vascular and Thoracic Institute, and.,Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
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44
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Keir DA, Badrov MB, Tomlinson G, Notarius CF, Kimmerly DS, Millar PJ, Shoemaker JK, Floras JS. Influence of Sex and Age on Muscle Sympathetic Nerve Activity of Healthy Normotensive Adults. Hypertension 2020; 76:997-1005. [PMID: 32783757 DOI: 10.1161/hypertensionaha.120.15208] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
As with blood pressure, age-related changes in muscle sympathetic nerve activity (MSNA) may differ nonlinearly between sexes. Data acquired from 398 male (age: 39±17; range: 18-78 years [mean±SD]) and 260 female (age: 37±18; range: 18-81 years) normotensive healthy nonmedicated volunteers were analyzed using linear regression models with resting MSNA burst frequency as the outcome and the predictors sex, age, MSNA, blood pressure, and body mass index modelled with natural cubic splines. Age and body mass index contributed 41% and 11%, respectively, of MSNA variance in females and 23% and 1% in males. Overall, changes in MSNA with age were sigmoidal. At age 20, mean MSNA of males and females were similar, then diverged significantly, reaching in women a nadir at age 30. After 30, MSNA increased nonlinearly in both sexes. Both MSNA discharge and blood pressure were lower in females until age 50 (17±9 versus 25±10 bursts·min-1; P<1×10-19; 106±11/66±8 versus 116±7/68±9 mm Hg; P<0.01) but converged thereafter (38±11 versus 35±12 bursts·min-1; P=0.17; 119±15/71±13 versus 120±13/72±9 mm Hg; P>0.56). Compared with age 30, MSNA burst frequency at age 70 was 57% higher in males but 3-fold greater in females; corresponding increases in systolic blood pressure were 1 (95% CI, -4 to 5) and 12 (95% CI, 6-16) mm Hg. Except for concordance in females beyond age 40, there was no systematic change with age in any resting MSNA-blood pressure relationship. In normotensive adults, MSNA increases after age 30, with ascendance steeper in women.
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Affiliation(s)
- Daniel A Keir
- From the University Health Network and Sinai Health System Division of Cardiology, Department of Medicine, University of Toronto and the Toronto General Research Institute, University Health Network, Toronto, ON, Canada (D.A.K., M.B.B., G.T., C.F.N., D.S.K., P.J.M., J.S.F.)
| | - Mark B Badrov
- From the University Health Network and Sinai Health System Division of Cardiology, Department of Medicine, University of Toronto and the Toronto General Research Institute, University Health Network, Toronto, ON, Canada (D.A.K., M.B.B., G.T., C.F.N., D.S.K., P.J.M., J.S.F.).,School of Kinesiology, University of Western Ontario, London, ON, Canada (M.B.B., J.K.S.)
| | - George Tomlinson
- From the University Health Network and Sinai Health System Division of Cardiology, Department of Medicine, University of Toronto and the Toronto General Research Institute, University Health Network, Toronto, ON, Canada (D.A.K., M.B.B., G.T., C.F.N., D.S.K., P.J.M., J.S.F.)
| | - Catherine F Notarius
- From the University Health Network and Sinai Health System Division of Cardiology, Department of Medicine, University of Toronto and the Toronto General Research Institute, University Health Network, Toronto, ON, Canada (D.A.K., M.B.B., G.T., C.F.N., D.S.K., P.J.M., J.S.F.)
| | - Derek S Kimmerly
- From the University Health Network and Sinai Health System Division of Cardiology, Department of Medicine, University of Toronto and the Toronto General Research Institute, University Health Network, Toronto, ON, Canada (D.A.K., M.B.B., G.T., C.F.N., D.S.K., P.J.M., J.S.F.).,Division of Kinesiology, School of Health and Performance, Dalhousie University, Halifax, NS, Canada (D.S.K.)
| | - Philip J Millar
- From the University Health Network and Sinai Health System Division of Cardiology, Department of Medicine, University of Toronto and the Toronto General Research Institute, University Health Network, Toronto, ON, Canada (D.A.K., M.B.B., G.T., C.F.N., D.S.K., P.J.M., J.S.F.)
| | - J Kevin Shoemaker
- School of Kinesiology, University of Western Ontario, London, ON, Canada (M.B.B., J.K.S.).,Department of Human Health and Nutritional Science, University of Guelph, ON, Canada (P.J.M.)
| | - John S Floras
- From the University Health Network and Sinai Health System Division of Cardiology, Department of Medicine, University of Toronto and the Toronto General Research Institute, University Health Network, Toronto, ON, Canada (D.A.K., M.B.B., G.T., C.F.N., D.S.K., P.J.M., J.S.F.)
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Kasai T, Taranto Montemurro L, Yumino D, Wang H, Floras JS, Newton GE, Mak S, Ruttanaumpawan P, Parker JD, Bradley TD. Inverse relationship of subjective daytime sleepiness to mortality in heart failure patients with sleep apnoea. ESC Heart Fail 2020; 7:2448-2454. [PMID: 32608195 PMCID: PMC7524079 DOI: 10.1002/ehf2.12808] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/20/2020] [Accepted: 05/14/2020] [Indexed: 12/27/2022] Open
Abstract
Aims Patients with sleep apnoea (SA) and heart failure (HF) are less sleepy than SA patients without HF. HF and SA both increase sympathetic nervous system activity (SNA). SNA can augment alertness. We previously showed that in HF patients, the degree of daytime sleepiness was not related to the severity of SA but was inversely related to SNA. Elevated SNA is associated with increased mortality in HF. Therefore, we hypothesized that in HF patients with SA, the degree of daytime sleepiness will be inversely related to mortality. Methods and results In a prospective cohort study, 218 consecutive patients with systolic HF had overnight polysomnography. Among them, 80 subjects with SA (apnoea–hypopnoea index ≥15) were followed for a mean of 28 months to determine all‐cause mortality rate. Subjective daytime sleepiness was assessed by the Epworth Sleepiness Scale (ESS). During follow‐up, 20 patients died. The 5 year death rate in patients with ESS less than 6 (i.e. less sleepy) was significantly higher than in patients with an ESS at or above the median of 6 (i.e. sleepier) [21.3 deaths/100 patient‐years vs. 6.2 deaths/100 patient‐years, unadjusted hazard ratio (HR) 2.94, 95% confidence interval (CI) 1.20 to 7.20, P = 0.018]. After adjusting for confounding factors that included sex, history of hypertension, and mean arterial oxyhaemoglobin saturation, compared with the sleepier patients, less sleepy patients had greater risk of mortality (HR 2.56, 95% CI 1.01 to 6.47, P = 0.047). As a continuous variable, ESS scores were inversely related to mortality risk (HR 0.86, 95% CI 0.75 to 0.98, P = 0.022). Conclusions In patients with HF and SA, the degree of subjective daytime sleepiness is inversely related to the mortality risk, suggesting that among HF patients with SA, those with the least daytime sleepiness are at greater risk of death. They may therefore have greater potential for mortality benefit from therapy of SA than those with greater daytime sleepiness.
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Affiliation(s)
- Takatoshi Kasai
- Sleep Research Laboratory of the Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada.,Centre for Sleep Medicine and Circadian Biology, University of Toronto, Toronto, Ontario, Canada.,Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Luigi Taranto Montemurro
- Sleep Research Laboratory of the Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada.,Centre for Sleep Medicine and Circadian Biology, University of Toronto, Toronto, Ontario, Canada
| | - Dai Yumino
- Sleep Research Laboratory of the Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada.,Centre for Sleep Medicine and Circadian Biology, University of Toronto, Toronto, Ontario, Canada
| | - Hanqiao Wang
- Sleep Research Laboratory of the Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada.,Centre for Sleep Medicine and Circadian Biology, University of Toronto, Toronto, Ontario, Canada
| | - John S Floras
- Department of Medicine of the Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada.,Department of Medicine, Toronto General Hospital of the University Health Network, 9N-943, 200 Elizabeth Street, Toronto, Ontario, M5G 2C4, Canada
| | - Gary E Newton
- Department of Medicine of the Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Susanna Mak
- Department of Medicine of the Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Pimon Ruttanaumpawan
- Sleep Research Laboratory of the Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada.,Centre for Sleep Medicine and Circadian Biology, University of Toronto, Toronto, Ontario, Canada
| | - John D Parker
- Department of Medicine of the Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada.,Department of Medicine, Toronto General Hospital of the University Health Network, 9N-943, 200 Elizabeth Street, Toronto, Ontario, M5G 2C4, Canada
| | - T Douglas Bradley
- Sleep Research Laboratory of the Toronto Rehabilitation Institute, University of Toronto, Toronto, Ontario, Canada.,Department of Medicine, Toronto General Hospital of the University Health Network, 9N-943, 200 Elizabeth Street, Toronto, Ontario, M5G 2C4, Canada.,Centre for Sleep Medicine and Circadian Biology, University of Toronto, Toronto, Ontario, Canada
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He W, Tang Y, Meng G, Wang D, Wong J, Mitscher GA, Adams D, Everett TH, Chen PS, Manchanda S. Skin sympathetic nerve activity in patients with obstructive sleep apnea. Heart Rhythm 2020; 17:1936-1943. [PMID: 32569836 DOI: 10.1016/j.hrthm.2020.06.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/05/2020] [Accepted: 06/15/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is associated with increased cardiac arrhythmia and sudden cardiac death. We recently developed a new method (neuECG) to noninvasively measure electrocardiogram and skin sympathetic nerve activity (SKNA). OBJECTIVE The purpose of this study was to test the hypothesis that SKNA measured during sleep study is higher in patients with OSA than in those without OSA. METHODS We prospectively recorded neuECG and polysomnography in 26 patients undergoing a sleep study. Sleep stages were scored into rapid eye movement (REM), and non-REM sleep stages 1 (N1), 2 (N2), and 3 (N3). Average voltage of skin sympathetic nerve activity (aSKNA) and SKNA burst area were calculated for quantification. Apnea/hypopnea index (AHI) >5 per hour was used to diagnose OSA. RESULTS There was a positive correlation (r = 0.549; P = .018) between SKNA burst area and the arousal index in OSA but not in the control group. aSKNA during sleep was 0.61 ± 0.09 μV in OSA patients (n = 18) and 0.53 ± 0.04 μV in control patients (n = 8; P = .025). Burst area was 3.26 (1.90-4.47) μV·s/min in OSA patients and 1.31 (0.67-1.94) μV·s/min in control (P = .047). More apparent differences were found during N2, when the burst area in OSA (3.06 [1.46-5.52] μV·s/min) was much higher than that of the control (0.89 [0.79-1.65] μV·s/min; P = .03). CONCLUSION OSA patients have higher SKNA activity than control patients, with the most pronounced differences observed during N2. Arousal at the end of apnea episodes is associated with large SKNA bursts. Overlaps of aSKNA and SKNA burst area between groups suggest that not all OSA patients have increased sympathetic tone.
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Affiliation(s)
- Wenbo He
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana; Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yuzhu Tang
- Indiana University Health Physicians, Indianapolis, Indiana
| | - Guannan Meng
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana; Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Danning Wang
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana; Department of Anesthesiology, General Hospital of Southern Theater Command of PLA, Guangzhou, China
| | - Johnson Wong
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Gloria A Mitscher
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - David Adams
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Thomas H Everett
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Peng-Sheng Chen
- The Krannert Institute of Cardiology, Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana; Indiana University Health Physicians, Indianapolis, Indiana
| | - Shalini Manchanda
- Indiana University Health Physicians, Indianapolis, Indiana; Section of Pulmonary Critical Care, Sleep and Occupational Medicine, Indiana University School of Medicine, Indianapolis, Indiana.
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Ferreira CB, Schoorlemmer GH, Rocha AA, Cravo SL. Increased sympathetic responses induced by chronic obstructive sleep apnea are caused by sleep fragmentation. J Appl Physiol (1985) 2020; 129:163-172. [PMID: 32552428 DOI: 10.1152/japplphysiol.00811.2019] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Obstructive sleep apnea (OSA) is often associated with sympathetic overactivity and hypertension. These associations are mainly attributed to hypoxia acting on arterial chemoreceptors. However, the contribution of arousal from sleep is unclear. We measured the effect of OSA and sleep fragmentation on cardiovascular and sympathetic function and gene expression in the brain in rats. Male Wistar rats were fitted with a tracheal balloon and EEG and electromyogram electrodes and assigned to control (n = 6), OSA (n = 9), or arousal (n = 8) treatments. The OSA group was subjected to obstructive apnea, each time the rat entered sleep, for 8 h/day for 15 days. The arousal group was similarly exposed to vibration, which was produced with a miniature vibration motor mounted on the rat's head. Vibration intensity slowly increased until the rat awoke. One day after the last apnea or arousal, rats were anesthetized and arterial blood pressure and splanchnic sympathetic nerve activity (SSNA) were recorded. Baseline mean and diastolic pressure were increased after OSA. Resting SSNA was similar in the three groups, but both OSA and sleep fragmentation increased sympathetic activation in response to airway obstruction and chemoreflex activation by cyanide. OSA increased superoxide dismutases 1 and 2 in the brainstem, whereas sleep fragmentation did not. Our results suggest that sympathetic overactivity to chemoreceptor stimulation was a consequence of arousal from sleep. Our study suggests that sleep disruption may have an important role in the development of apnea-related sympathetic activation.NEW & NOTEWORTHY Obstructive sleep apnea causes a hyperactive chemoreflex, with increased sympathetic activation. However, it is not clear whether this pathophysiologic mechanism is due to repeated hypoxia or to sleep disruption. The present study suggests that sleep fragmentation contributes importantly to increased sympathetic activation after chemoreceptor stimulation. This suggests that sleep fragmentation has an important role in the sympathetic activation seen in sleep apnea patients.
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Affiliation(s)
- Caroline B Ferreira
- Departamento de Fisiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Guus H Schoorlemmer
- Departamento de Fisiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Antonio A Rocha
- Departamento de Fisiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Sergio L Cravo
- Departamento de Fisiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
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Scott MC, Hogwood AC, Fralin RC, Weggen JB, Zúñiga TM, Garten RS. Low sleep efficiency does not impact upper or lower limb vascular function in young adults. Exp Physiol 2020; 105:1373-1383. [PMID: 32495341 DOI: 10.1113/ep088658] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/01/2020] [Indexed: 12/28/2022]
Abstract
NEW FINDINGS What is the central question of this study? We sought to investigate whether young adults reporting low sleep quality possessed lower vascular function and altered autonomic nervous system modulation when compared with young adults reporting high sleep quality. What is the main finding and its importance? The study revealed that in young adults reporting low sleep quality, neither vascular nor autonomic function was significantly different when compared with young adults reporting high sleep quality. These findings suggest that young adults are either not substantially impacted by or can adequately adapt to the negative consequences commonly associated with poor sleep. ABSTRACT The aim of the study was to investigate whether young adults reporting low sleep quality also possessed lower vascular function, potentially stemming from altered autonomic nervous system modulation, when compared with young adults reporting high sleep quality. Thirty-one healthy young adults (age 24 ± 4 years) underwent a 7 night sleep assessment (Actigraph GT3X accelerometer). After the sleep assessment, subjects meeting specific criteria were separated into high (HSE; ≥85%; n = 11; eight men and three women) and low (LSE; <80%; n = 11; nine men and two women) sleep efficiency groups. Peripheral vascular function was assessed in the upper and lower limb, using the flow-mediated dilatation technique in the arm (brachial artery) and leg (superficial femoral artery). Heart rate variability was evaluated during 5 min of rest and used frequency parameters reflective of parasympathetic and/or sympathetic nervous system modulation (high- and low-frequency parameters). By experimental design, significant differences in sleep quality between groups were reported, with the LSE group exhibiting a longer time awake after sleep onset, higher number of awakenings and longer average time per awakening when compared with the HSE group. Despite these differences in sleep quality, no significant differences in upper and lower limb vascular function and heart rate variability measures were revealed when comparing the LSE and HSE groups. Additionally, in all subjects (n = 31), no correlations between sleep efficiency and vascular function/autonomic modulation were revealed. This study revealed that low sleep quality does not impact upper or lower limb vascular function or autonomic nervous system modulation in young adults.
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Affiliation(s)
- Matthew C Scott
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Austin C Hogwood
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - Richard C Fralin
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Jennifer B Weggen
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Tiffany M Zúñiga
- Department of Nutritional Sciences, The University of Arizona, Tucson, AZ, USA
| | - Ryan S Garten
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
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Jha A, Banerjee N, Feltch C, Robucci R, Earley CJ, Lam J, Allen R. Pilot study: can machine learning analyses of movement discriminate between leg movements in sleep (LMS) with vs. without cortical arousals? Sleep Breath 2020; 25:373-379. [DOI: 10.1007/s11325-020-02100-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/26/2020] [Accepted: 05/01/2020] [Indexed: 11/24/2022]
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Staats R, Barros I, Fernandes D, Grencho D, Reis C, Matos F, Valença J, Marôco J, de Almeida AB, Bárbara C. The Importance of Sleep Fragmentation on the Hemodynamic Dipping in Obstructive Sleep Apnea Patients. Front Physiol 2020; 11:104. [PMID: 32231580 PMCID: PMC7082422 DOI: 10.3389/fphys.2020.00104] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/28/2020] [Indexed: 12/19/2022] Open
Abstract
Introduction Obstructive sleep apnea (OSA) has been associated with non-dipping blood pressure (BP). The precise mechanism is still under investigation, but repetitive oxygen desaturation and arousal induced sleep fragmentation are considered the main contributors. Methods We analyzed beat-to-beat measurements of hemodynamic parameters (HPs) during a 25-min period of wake–sleep transition. Differences in the mean HP values for heart rate (HR), systolic BP (SBP), and stroke volume (SV) during wake and sleep and their standard deviations (SDs) were compared between 34 controls (C) and 22 OSA patients. The Student’s t-test for independent samples and the effect size by Cohen’s d (d) were calculated. HP evolution was investigated by plotting the measured HP values against each consecutive pulse wave. After a simple regression analysis, the calculated coefficient beta (SCB) was used to indicate the HP evolution. We furthermore explored by a hierarchical block regression which variables increased the prediction for the SCB: model 1 BMI and age, model 2 + apnea/hypopnea index (AHI), and model 3 + arousal index (AI). Results Between the two groups, the SBP increased in OSA and decreased in C resulting in a significant difference (p = 0.001; d = 0.92). The SV demonstrated a similar development (p = 0.047; d = 0.56). The wake/sleep variation of the HP measured by the SD was higher in the OSA group—HR: p < 0.001; d = 1.2; SBP: p = 0.001; d = 0.94; and SV: p = 0.005; d = 0.82. The hierarchical regression analysis of the SCB demonstrated in SBP that the addition of AI to AHI resulted in ΔR2: +0.163 and ΔF + 13.257 (p = 0.001) and for SV ΔR2: +0.07 and ΔF 4.83 (p = 0.003). The AI but not the AHI remained statistically significant in the regression analysis model 3—SBP: β = 0.717, p = 0.001; SV: β = 0.469, p = 0.033. Conclusion In this study, we demonstrated that in OSA, the physiological dipping in SBP and SV decreased, and the variation of all investigated parameters increased. Hierarchical regression analysis indicates that the addition of the AI to BMI, age, and AHI increases the prediction of the HP evolution following sleep onset for both SBP and SV and may be the most important variable.
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Affiliation(s)
- Richard Staats
- Departamento do Tórax, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal.,Instituto de Saúde Ambiental (ISAMB), Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Inês Barros
- Departamento do Tórax, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - Dina Fernandes
- Departamento do Tórax, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - Dina Grencho
- Departamento do Tórax, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - Cátia Reis
- Instituto de Saúde Ambiental (ISAMB), Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,CENC - Sleep Medicine Center, Lisbon, Portugal
| | - Filipa Matos
- Departamento do Tórax, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - João Valença
- Departamento do Tórax, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal.,Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - João Marôco
- William James Centre for Research, ISPA-IU, Lisbon, Portugal
| | | | - Cristina Bárbara
- Departamento do Tórax, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal.,Instituto de Saúde Ambiental (ISAMB), Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
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