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Attreed A, Morand LR, Pond DC, Sturmberg JP. The Clinical Role of Heart Rate Variability Assessment in Cognitively Impaired Patients and Its Applicability in Community Care Settings: A Systematic Review of the Literature. Cureus 2024; 16:e61703. [PMID: 38975380 PMCID: PMC11226213 DOI: 10.7759/cureus.61703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2024] [Indexed: 07/09/2024] Open
Abstract
Heart rate variability (HRV) correlates well with a person's overall physiological function. Clinically, HRV is successfully used in acute care to identify impending infections, but little is known about its potential in the management of chronic diseases like cognitive decline/dementia. The aim of this study was to identify the best available knowledge about HRV in cognitively impaired populations that might be applied to improve clinical practice in community settings. We conducted a systematic literature search in PubMed, Embase, and Cochrane databases published from January 2009 to August 2022. Eligible studies were selected using Covidence and each study underwent qualitative assessment using the Mixed Method Appraisal Tool. At each stage of selection, each study was reviewed independently by two members of the team, and any disputes were discussed along the way. The literature identified that the brain regions controlling HRV are also those affected by dementias of Alzheimer's type (AD) and Lewy body types (DLB). HRV was impaired in both types, with DLB showing greater impairment in all HRV parameters compared to AD. No studies explored the temporal changes of HRV or its use in the clinical management of people with cognitive impairment (CI). The current lack of standardization of HRV recording and analysis limits its use in clinical practice. HRV may emerge as a potentially useful tool to identify people with early/preclinical memory impairment and help to differentiate AD from DLB. Longitudinal HRV measurement is emerging as a useful way to monitor disease progression and treatment response, and continuous HRV measurement may prove useful in the early identification of sepsis and its complications in patients no longer able to communicate their illness experiences.
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Affiliation(s)
- Amanda Attreed
- General Medicine, Central Coast Local Health District, Gosford, AUS
| | - Louisa R Morand
- General Medicine, Royal Brisbane and Women's Hospital, Brisbane, AUS
| | - Dimity C Pond
- General Practice, Wicking Dementia Research and Training Centre, Hobart, AUS
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Mizukami K. Autonomic dysfunction in dementia with Lewy bodies: Focusing on cardiovascular and respiratory dysfunction. PCN REPORTS : PSYCHIATRY AND CLINICAL NEUROSCIENCES 2023; 2:e129. [PMID: 38867816 PMCID: PMC11114397 DOI: 10.1002/pcn5.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/17/2023] [Accepted: 07/24/2023] [Indexed: 06/14/2024]
Abstract
Dementia with Lewy bodies (DLB) is the second most common cause of dementia after Alzheimer's disease. The disease is characterized by many Lewy bodies appearing in the patient's cerebrum. DLB frequently presents with a variety of autonomic symptoms from the early or prodromal stages of the disease, and these are listed as supportive features in the diagnostic criteria. As several useful assessment methods for evaluating autonomic function in DLB have been reported, this review will focus on cardiovascular and respiratory dysfunction and its assessments. Cardiovascular disorders, such as orthostatic hypotension and abnormal heart rate variability, have been reported in DLB patients. Decreased myocardial uptake by metaiodobenzylguanidine myocardial scintigraphy has been added as an indicative biomarker for DLB in the 2017 revision of the diagnostic criteria. We have reported reduced ventilatory response to hypercapnia, abnormal respiratory rhythm, and high frequency of sleep-disordered breathing as abnormalities of the respiratory regulatory system associated with DLB. Since autonomic dysfunction is highly prevalent in DLB from the early or prodromal phase of the disease and is associated with reduced activities of daily living and quality of life, the evaluation of autonomic dysfunction is also useful in the differential diagnosis of DLB from Alzheimer's disease. There are fewer studies on the respiratory regulatory system than on the cardiovascular system, thus further research is needed to explore its role in DLB.
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Affiliation(s)
- Katsuyoshi Mizukami
- Graduate School of Comprehensive Human Sciences, Institute of Health and Sport SciencesUniversity of TsukubaBunkyo‐kuTokyoJapan
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Heyman I, Persson T, Haglund M, Londos E. Exploring the prevalence of undetected bradyarrhythmia in dementia with Lewy bodies. Clin Auton Res 2023; 33:433-442. [PMID: 37405543 PMCID: PMC10439050 DOI: 10.1007/s10286-023-00962-w] [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: 03/21/2023] [Accepted: 06/20/2023] [Indexed: 07/06/2023]
Abstract
PURPOSE To explore the prevalence of undetected bradyarrhythmia in a cohort of people with dementia with Lewy bodies. METHODS Thirty participants diagnosed with dementia with Lewy bodies were enrolled from three memory clinics in southern Sweden between May 2021 and November 2022. None had a history of high-grade atrioventricular block or sick sinus syndrome. Each participant underwent orthostatic testing, cardiac [123I]metaiodobenzylguanidine scintigraphy and 24-h ambulatory electrocardiographic monitoring. Concluding bradyarrhythmia diagnosis was obtained until the end of December 2022. RESULTS Thirteen participants (46.4%) had bradycardia at rest during orthostatic testing and four had an average heart rate < 60 beats per minute during ambulatory electrocardiographic monitoring. Three participants (10.7%) received a diagnosis of sick sinus syndrome, of whom two received pacemaker implants to manage associated symptoms. None received a diagnosis of second- or third-degree atrioventricular block. CONCLUSION This report showed a high prevalence of sick sinus syndrome in a clinical cohort of people with dementia with Lewy bodies. Further research on the causes and consequences of sick sinus syndrome in dementia with Lewy bodies is thus warranted.
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Affiliation(s)
- Isak Heyman
- Cognitive Disorder Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden.
| | - Torbjörn Persson
- Department of Cardiology, Skane University Hospital, Malmö, Sweden
| | - Mattias Haglund
- Division of Pathology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Elisabet Londos
- Cognitive Disorder Research Unit, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institute, Stockholm, Sweden
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Zhu ZY, Liu YD, Gong Y, Jin W, Topchiy E, Turdi S, Gao YF, Culver B, Wang SY, Ge W, Zha WL, Ren J, Pei ZH, Qin X. Mitochondrial aldehyde dehydrogenase (ALDH2) rescues cardiac contractile dysfunction in an APP/PS1 murine model of Alzheimer's disease via inhibition of ACSL4-dependent ferroptosis. Acta Pharmacol Sin 2022; 43:39-49. [PMID: 33767380 PMCID: PMC8724276 DOI: 10.1038/s41401-021-00635-2] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/26/2021] [Indexed: 02/01/2023] Open
Abstract
Alzheimer's disease (AD) is associated with high incidence of cardiovascular events but the mechanism remains elusive. Our previous study reveals a tight correlation between cardiac dysfunction and low mitochondrial aldehyde dehydrogenase (ALDH2) activity in elderly AD patients. In the present study we investigated the effect of ALDH2 overexpression on cardiac function in APP/PS1 mouse model of AD. Global ALDH2 transgenic mice were crossed with APP/PS1 mutant mice to generate the ALDH2-APP/PS1 mutant mice. Cognitive function, cardiac contractile, and morphological properties were assessed. We showed that APP/PS1 mice displayed significant cognitive deficit in Morris water maze test, myocardial ultrastructural, geometric (cardiac atrophy, interstitial fibrosis) and functional (reduced fractional shortening and cardiomyocyte contraction) anomalies along with oxidative stress, apoptosis, and inflammation in myocardium. ALDH2 transgene significantly attenuated or mitigated these anomalies. We also noted the markedly elevated levels of lipid peroxidation, the essential lipid peroxidation enzyme acyl-CoA synthetase long-chain family member 4 (ACSL4), the transcriptional regulator for ACLS4 special protein 1 (SP1) and ferroptosis, evidenced by elevated NCOA4, decreased GPx4, and SLC7A11 in myocardium of APP/PS1 mutant mice; these effects were nullified by ALDH2 transgene. In cardiomyocytes isolated from WT mice and in H9C2 myoblasts in vitro, application of Aβ (20 μM) decreased cell survival, compromised cardiomyocyte contractile function, and induced lipid peroxidation; ALDH2 transgene or activator Alda-1 rescued Aβ-induced deteriorating effects. ALDH2-induced protection against Aβ-induced lipid peroxidation was mimicked by the SP1 inhibitor tolfenamic acid (TA) or the ACSL4 inhibitor triacsin C (TC), and mitigated by the lipid peroxidation inducer 5-hydroxyeicosatetraenoic acid (5-HETE) or the ferroptosis inducer erastin. These results demonstrate an essential role for ALDH2 in AD-induced cardiac anomalies through regulation of lipid peroxidation and ferroptosis.
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Affiliation(s)
- Zhi-Yun Zhu
- Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006, China
| | - Yan-Dong Liu
- The Second Department of Cardiology, The Third Hospital of Nanchang, Nanchang, 330009, China
| | - Yan Gong
- The Second Department of Cardiology, The Third Hospital of Nanchang, Nanchang, 330009, China
| | - Wei Jin
- The Second Department of Cardiology, The Third Hospital of Nanchang, Nanchang, 330009, China
| | - Elena Topchiy
- University of Wyoming College of Health Sciences, Laramie, WY, USA
| | - Subat Turdi
- University of Wyoming College of Health Sciences, Laramie, WY, USA
| | - Yue-Feng Gao
- University of Wyoming College of Health Sciences, Laramie, WY, USA
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100083, China
| | - Bruce Culver
- University of Wyoming College of Health Sciences, Laramie, WY, USA
| | - Shu-Yi Wang
- University of Wyoming College of Health Sciences, Laramie, WY, USA
| | - Wei Ge
- Department of General Practice, Xijing Hospital, the Air Force Military Medical University, Xi'an, 710032, China
| | - Wen-Liang Zha
- Department of Surgery, Clinic Medical College, Hubei University of Science and Technology, Xianning, 437100, China
- National Demonstration Center for Experimental General Medicine Education, Hubei University of Science and Technology, Xianning, 437100, China
| | - Jun Ren
- University of Wyoming College of Health Sciences, Laramie, WY, USA.
- Department of Cardiology and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, Shanghai, 200032, China.
| | - Zhao-Hui Pei
- The Second Department of Cardiology, The Third Hospital of Nanchang, Nanchang, 330009, China.
| | - Xing Qin
- University of Wyoming College of Health Sciences, Laramie, WY, USA.
- Department of Cardiology, Xijing Hospital, the Air Force Military Medical University, Xi'an, 710032, China.
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