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Walter LM, Kleeman EA, Shetty M, Bassam A, Andiana AS, Tamanyan K, Davey MJ, Nixon GM, Horne RS. The surge in heart rate and blood pressure at respiratory event termination is dampened in children with down syndrome. Sleep Med 2024; 119:451-457. [PMID: 38788315 DOI: 10.1016/j.sleep.2024.05.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 05/12/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024]
Abstract
BACKGROUND Children with Down syndrome (DS) have a high prevalence of sleep disordered breathing (SDB) and altered cardiovascular autonomic control. We aimed to analyze the effect of DS on the surge in heart rate (HR) and pulse transit time (PTT, an inverse surrogate measure of blood pressure change) at respiratory event termination. METHODS 44 children (3-19 y) with DS and 44 typically developing (TD) children matched for SDB severity, age and sex underwent overnight polysomnography. Multilevel modelling determined the effect of DS on HR and PTT changes between a 10s pre-event to the latter half of each respiratory event (late-event) and 15s post-event during NREM and REM, accounting for SDB severity and event length. RESULTS The children with DS had a significantly smaller % change in HR late-event to post-event (NREM: DS 26.4 % ± 17.5 % (mean ± SD), TD 30.7 % ± 21.0 %; REM DS 16.9 % ± 15.3 %, TD 21.0 % ± 14.0 %; p < 0.05 for both) compared with TD children for obstructive events, and central events (13.2 % ± 17.0 %, TD 18.8 % ± 17.0 %; p < 0.01) during REM. %change in PTT was significantly smaller in the DS group during NREM and REM from pre-event and late-event to post-event compared with TD children for obstructive and central events. CONCLUSION These results suggest children with DS have dampened HR and BP responses to respiratory events compared with TD children. Whether this is symptomatic of autonomic dysfunction or a protective factor for the cardiovascular system in children with DS remains to be elucidated.
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Affiliation(s)
- Lisa M Walter
- Department of Paediatrics, Monash University, Melbourne, Australia.
| | | | - Marisha Shetty
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Ahmad Bassam
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Alyssa S Andiana
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Knarik Tamanyan
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Margot J Davey
- Department of Paediatrics, Monash University, Melbourne, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Australia
| | - Gillian M Nixon
- Department of Paediatrics, Monash University, Melbourne, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Australia
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Kubota T, Thyagaraj S, Gia Huynh H, Kanubhai Gajera P, Awori V, Zande JL, Lüders HO, Fernandez-Baca Vaca G. Distinction between epileptic and non-epileptic arousal by heart rate change. Epilepsy Behav 2023; 148:109487. [PMID: 37897862 DOI: 10.1016/j.yebeh.2023.109487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 10/08/2023] [Accepted: 10/08/2023] [Indexed: 10/30/2023]
Abstract
OBJECTIVE We investigated the difference in heart rate (HR) change between epileptic and non-epileptic arousals in adult patients with epilepsy (PWE). METHODS This is a case-control study conducted at the University Hospitals of Cleveland Medical Center. Inclusion criteria are (1) adult (≥18 years old) PWE who had arousal related to a focal aware or impaired awareness automatism seizure with or without focal to bilateral tonic-clonic seizure during an Epilepsy Monitoring Unit (EMU) admission between January 2009 and January 2021 or (2) adult PWE who had a non-epileptic arousal during an EMU admission between July 2020 and January 2021. Outcomes are (1) a percent change in baseline HR within 60 s after arousal and (2) the highest percent change in baseline HR within a 10-s sliding time window within 60 s after arousal. RESULTS We included 20 non-epileptic arousals from 20 adult PWE and 29 epileptic arousals with seizures from 29 adult PWE. Within 60 s after arousal, HR increased by a median of 86.7% (interquartile range (IQR), 52.7%-121.3%) in the epileptic arousal group compared to a median of 26.1% (12.9%-43.3%) in the non-epileptic arousal group (p < 0.001). The cut-off value was 48.7%. The area under the curve (AUC), sensitivity, and specificity were 0.85, 0.79, and 0.80, respectively. More than 70.1% was only in the epileptic arousals, with 100% specificity. Within 10 s of the greatest change, HR increased by 36.5 (18.7%-48.4%) in the epileptic arousal group compared to 17.7 (10.9%-23.7%) in the non-epileptic arousal group (p < 0.001). The cut-off value was 36.5%. The AUC, sensitivity, and specificity were 0.79, 0.52, and 0.95, respectively. More than 48.1% was only in the epileptic arousals, with 100% specificity. SIGNIFICANCE Tachycardia during epileptic arousals was significantly higher and more robust compared to tachycardia during non-epileptic arousals.
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Affiliation(s)
- Takafumi Kubota
- Department of Neurology, University Hospitals of Cleveland Medical Center, Cleveland, OH, USA; Department of Neurology, Tohoku University School of Medicine, Sendai, Miyagi, Japan; Department of Epileptology, Tohoku University School of Medicine, Sendai, Miyagi, Japan.
| | - Suraj Thyagaraj
- Department of Neurology, University Hospitals of Cleveland Medical Center, Cleveland, OH, USA
| | - Huan Gia Huynh
- Epilepsy Clinic, OSF HealthCare Illinois Neurological Institute, Peoria, IL, USA
| | | | - Violet Awori
- Department of Neurology, University of Mississippi, University, MS, USA
| | - Jonathan L Zande
- Department of Neurology, University Hospitals of Cleveland Medical Center, Cleveland, OH, USA
| | - Hans O Lüders
- Department of Neurology, University Hospitals of Cleveland Medical Center, Cleveland, OH, USA
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Walter LM, Varkey JM, Gu C, Bassam A, Davey MJ, Nixon GM, Horne RS. Sleep disordered breathing improvement prevents worsening of autonomic dysfunction in children with Down syndrome. Sleep Med 2023; 107:219-228. [PMID: 37244137 DOI: 10.1016/j.sleep.2023.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/08/2023] [Accepted: 05/11/2023] [Indexed: 05/29/2023]
Abstract
BACKGROUND Resolution of sleep disordered breathing (SDB) in typically developing children normalises heart rate variability (HRV), a measure of autonomic control, to that of non-snoring controls. Children with Down Syndrome (DS) have dampened heart rate variability (HRV) but the effect of treatment is not known. To assess the effect of improvement of SDB on autonomic control we compared HRV in children with DS whose SDB improved over 2 y, to those whose SDB did not improve. METHODS 24 children (3-19 y) had a baseline and follow-up polysomnographic study 2 y later. Improved SDB was defined as a reduction in obstructive apnea hypopnea index (OAHI) to ≤ 50% of baseline. Children were grouped into Improved (n = 12) and Unimproved (n = 12). Power spectral analysis of the ECG determined low frequency (LF), high frequency (HF) power and the LF/HF ratio. Seven children in the Improved and 2 in the Unimproved group were treated following the baseline study. RESULTS In the Unimproved group at follow-up, LF power was lower compared to baseline during N3 and Total Sleep (p < 0.05 for both). HF power was lower during REM (p < 0.05). HRV remained unchanged between studies in the Improved group. CONCLUSION Autonomic control worsened as indicated by lower LF and HF power in children whose SDB was not improved. In contrast, in those children with improved SDB, autonomic control remained the same, suggesting improvement in SDB severity prevents further worsening of autonomic control in children with DS.
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Affiliation(s)
- Lisa M Walter
- Department of Paediatrics, Monash University, Melbourne, Australia.
| | - Jyothi M Varkey
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Cecilia Gu
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Ahmad Bassam
- Department of Paediatrics, Monash University, Melbourne, Australia
| | - Margot J Davey
- Department of Paediatrics, Monash University, Melbourne, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Australia
| | - Gillian M Nixon
- Department of Paediatrics, Monash University, Melbourne, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Australia
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Cardiovascular complications of sleep disordered breathing in the population with Down syndrome. PROGRESS IN PEDIATRIC CARDIOLOGY 2022. [DOI: 10.1016/j.ppedcard.2022.101580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Horne RSC. Consequences of paediatric sleep disordered breathing: contributions from Australian and New Zealand investigators. Sleep Med 2020; 77:147-160. [PMID: 33373901 DOI: 10.1016/j.sleep.2020.11.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/23/2020] [Accepted: 11/29/2020] [Indexed: 12/13/2022]
Abstract
AIMS To highlight the contributions of Australian and New Zealand researchers to the identification of the consequences of paediatric sleep disordered breathing (SDB). METHODS A search was conducted in PubMed using the terms "sleep disordered breathing" "child" and "Australia or New Zealand". All abstracts were reviewed and those which focused on the consequences of SDB have been included. RESULTS Australasian research into the consequences of SDB has grown exponentially over the last 35 years. SDB has significant adverse consequences for quality of life, behaviour, neurocognition and the cardiovascular system and the Australasian research studies investigating these are summarised. CONCLUSIONS Australian and New Zealand researchers have played a significant role in understanding the consequences of paediatric SDB and the mechanisms which underpin these. The research conducted "Downunder" has led the world in this field of research and will continue to provide evidence to improve the lives of children not only in Australasia but around the world.
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Affiliation(s)
- Rosemary S C Horne
- Department of Paediatrics, Monash University, Level 5, Monash Children's Hospital, 246 Clayton Rd, Melbourne, 3168, Victoria, Australia.
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Dumortier L, Bricout VA. Obstructive sleep apnea syndrome in adults with down syndrome: Causes and consequences. Is it a "chicken and egg" question? Neurosci Biobehav Rev 2020; 108:124-138. [DOI: 10.1016/j.neubiorev.2019.10.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/11/2019] [Accepted: 10/26/2019] [Indexed: 12/31/2022]
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Lin SC, Davey MJ, Horne RSC, Nixon GM. Screening for obstructive sleep apnea in children with Down syndrome. J Pediatr 2014; 165:117-22. [PMID: 24679609 DOI: 10.1016/j.jpeds.2014.02.032] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 01/07/2014] [Accepted: 02/17/2014] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To compare symptoms of obstructive sleep apnea (OSA) and polysomnography (PSG) results in children with Down syndrome and typically developing children. STUDY DESIGN A total of 49 children with Down syndrome referred for PSG between 2008 and 2012 were matched with typically developing children of the same sex, age, and OSA severity who had undergone PSG in the same year. A parent completed a sleep symptom questionnaire for each child. Sleep quality and measures of gas exchange were compared between the matched groups. RESULTS The 98 children (46 females, 52 males) had mean age of 6.2 years (range, 0.3-16.9 years). Fourteen children had primary snoring, and 34 had OSA (9 mild, 7 moderate, and 19 severe). Children with Down syndrome had more severe OSA compared with 278 typically developing children referred in 2012. Symptom scores were not different between the matched groups. Those with Down syndrome had a higher average pCO2 during sleep (P = .03) and worse McGill oximetry scores. CONCLUSION Compared with closely matched typically developing children with OSA of comparable severity, children with Down syndrome had a similar symptom profile and slightly worse gas exchange. Referred children with Down syndrome had more severe OSA than referred typically developing children, suggesting a relative reluctance by parents or doctors to investigate symptoms of OSA in children with Down syndrome. These findings highlight the need for formal screening tools for OSA in children with Down syndrome to improve detection of the condition in this high-risk group.
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Affiliation(s)
- Sandi C Lin
- The Ritchie Centre, MIMR-PHI Institute of Medical Research, Department of Pediatrics, Monash University, Clayton, Victoria, Australia
| | - Margot J Davey
- Melbourne Children's Sleep Centre, Monash Children's Hospital, Clayton, Victoria, Australia
| | - Rosemary S C Horne
- The Ritchie Centre, MIMR-PHI Institute of Medical Research, Department of Pediatrics, Monash University, Clayton, Victoria, Australia
| | - Gillian M Nixon
- The Ritchie Centre, MIMR-PHI Institute of Medical Research, Department of Pediatrics, Monash University, Clayton, Victoria, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Clayton, Victoria, Australia.
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Churchill SS, Kieckhefer GM, Landis CA, Ward TM. Sleep measurement and monitoring in children with Down syndrome: a review of the literature, 1960-2010. Sleep Med Rev 2012; 16:477-88. [PMID: 22410159 PMCID: PMC3408773 DOI: 10.1016/j.smrv.2011.10.003] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 10/22/2011] [Accepted: 10/25/2011] [Indexed: 11/16/2022]
Abstract
Children with Down syndrome (DS) are at risk for sleep disturbances due to the anatomical features of the syndrome. Over the past 50 years research studies have measured sleep in children with DS to characterize sleep architecture and its relation to developmental delay. In the 1980s sleep disordered breathing (SDB) was recognized as a major cause of sleep disturbance in DS. The aim of this comprehensive review is to synthesize studies and present the historical context of evolving technologies, methodologies, and knowledge about SDB and DS. Future research opportunities and practice implications are discussed.
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Affiliation(s)
- Shervin S Churchill
- School of Nursing, Box 357260, University of Washington, Seattle, WA 98195-7260, USA.
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O'Driscoll DM, Horne RSC, Davey MJ, Hope SA, Anderson V, Trinder J, Walker AM, Nixon GM. Cardiac and sympathetic activation are reduced in children with Down syndrome and sleep disordered breathing. Sleep 2012; 35:1269-75. [PMID: 22942505 PMCID: PMC3413804 DOI: 10.5665/sleep.2084] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
STUDY OBJECTIVES Sleep disordered breathing (SDB) occurs at an increased incidence in children with Down Syndrome (DS) compared to the general pediatric population. We hypothesized that, compared with typically developing (TD) children with SDB, children with DS have a reduced cardiovascular response with delayed reoxygenation after obstructive respiratory events, and reduced sympathetic drive, providing a potential explanation for their increased risk of pulmonary hypertension. DESIGN Beat-by-beat heart rate (HR) was analyzed over the course of obstructive events (pre, early, late, post-event) and compared between groups. Also compared were the time for oxygen resaturation post-event and overnight urinary catecholamines. SETTING Pediatric sleep laboratory. PATIENTS Sixty-four children aged 2-17 y referred for investigation of SDB (32 DS; 32 TD) matched for age and obstructive apnea/hypopnea index. MEASUREMENT AND RESULTS Children underwent overnight polysomnography with overnight urine collection. Compared to TD children, those with DS had significantly reduced HR changes post-event during NREM (DS: 21.4% ± 1.8%, TD: 26.6% ± 1.6%, change from late to post-event, P < 0.05). The time to resaturation post-event was significantly increased in the DS group (P < 0.05 for both NREM and REM sleep). Children with DS had significantly reduced overnight urinary noradrenaline (P < 0.01), adrenaline (P < 0.05) and dopamine levels (P < 0.01) compared with TD children. CONCLUSION Children with DS and SDB exhibit a compromised acute cardio-respiratory response and dampened sympathetic response to SDB compared with TD children with SDB. These data may reflect autonomic dysfunction in children with DS that may place them at increased risk for cardiovascular complications such as pulmonary hypertension.
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Affiliation(s)
- Denise M O'Driscoll
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Victoria, Australia.
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Gozal D, Hakim F, Kheirandish-Gozal L. Chemoreceptors, baroreceptors, and autonomic deregulation in children with obstructive sleep apnea. Respir Physiol Neurobiol 2012; 185:177-85. [PMID: 22954503 DOI: 10.1016/j.resp.2012.08.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 08/21/2012] [Accepted: 08/23/2012] [Indexed: 11/17/2022]
Abstract
Obstructive sleep apnea (OSA) is highly prevalent sleep disorder of breathing in both adults and children that is fraught with substantial cardiovascular morbidities, the latter being attributable to a complex interplay between intermittent hypoxia (IH), episodic hypercapnia, recurrent large intra-thoracic pressure swings, and sleep disruption. Alterations in autonomic nervous system function could underlie the perturbations in cardiovascular, neurocognitive, immune, endocrine and metabolic functions that affect many of the patients suffering from OSA. Although these issues have received substantial attention in adults, the same has thus far failed to occur in children, creating a quasi misperception that children are protected. Here, we provide a critical overview of the evidence supporting the presence of autonomic nervous system (ANS) perturbations in children with OSA, draw some parallel assessments to known mechanisms in rodents and adult humans, particularly, peripheral and central chemoreceptor and baroreceptor pathways, and suggest future research directions.
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Affiliation(s)
- David Gozal
- Department of Pediatrics, Comer Children's Hospital, The University of Chicago, Chicago, IL, USA.
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