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Maia TFLD, Magalhães PAF, Santos DTS, de Brito Gomes JL, Schwingel PA, de Freitas Brito A. Current Concepts in Early Mobilization of Critically Ill Patients Within the Context of Neurologic Pathology. Neurocrit Care 2024; 41:272-284. [PMID: 38396279 DOI: 10.1007/s12028-023-01934-8] [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: 01/11/2023] [Accepted: 12/27/2023] [Indexed: 02/25/2024]
Abstract
Neurocritical patients (NCPs) in the intensive care unit (ICU) rapidly progress to respiratory and peripheral muscle dysfunctions, which significantly impact morbidity and death. Early mobilization in NCPs to decrease the incidence of ICU-acquired weakness has been showing rapid growth, although pertinent literature is still scarce. With this review, we summarize and discuss current concepts in early mobilization of critically ill patients within the context of neurologic pathology in NCPs. A narrative synthesis of literature was undertaken trying to answer the following questions: How do the respiratory and musculoskeletal systems in NCPs behave? Which metabolic biomarkers influence physiological responses in NCPs? Which considerations should be taken when prescribing exercises in neurocritically ill patients? The present review detected safety, feasibility, and beneficial response for early mobilization in NCPs, given successes in other critically ill populations and many smaller intervention trials in neurocritical care. However, precautions should be taken to elect the patient for early care, as well as monitoring signs that indicate interruption for intervention, as worse outcomes were associated with very early mobilization in acute stroke trials.
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Affiliation(s)
- Thaís Ferreira Lopes Diniz Maia
- Post Graduation Program in Rehabilitation and Functional Performance, Universidade de Pernambuco, BR 203, Km 2, s/n, Vila Eduardo, 56, Petrolina, Pernambuco, 328-900, Brazil.
| | - Paulo André Freire Magalhães
- Post Graduation Program in Rehabilitation and Functional Performance, Universidade de Pernambuco, BR 203, Km 2, s/n, Vila Eduardo, 56, Petrolina, Pernambuco, 328-900, Brazil
| | - Dasdores Tatiana Silva Santos
- Post Graduation Program in Rehabilitation and Functional Performance, Universidade de Pernambuco, BR 203, Km 2, s/n, Vila Eduardo, 56, Petrolina, Pernambuco, 328-900, Brazil
| | - Jorge Luiz de Brito Gomes
- Post Graduation Program in Rehabilitation and Functional Performance, Universidade de Pernambuco, BR 203, Km 2, s/n, Vila Eduardo, 56, Petrolina, Pernambuco, 328-900, Brazil
| | - Paulo Adriano Schwingel
- Post Graduation Program in Rehabilitation and Functional Performance, Universidade de Pernambuco, BR 203, Km 2, s/n, Vila Eduardo, 56, Petrolina, Pernambuco, 328-900, Brazil
| | - Aline de Freitas Brito
- Post Graduation Program in Rehabilitation and Functional Performance, Universidade de Pernambuco, BR 203, Km 2, s/n, Vila Eduardo, 56, Petrolina, Pernambuco, 328-900, Brazil
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Aaftink D, Reijneveld JC, de Lange F, Sander JW, Thijs RD. Grading objective diagnostic components in paroxysmal events: One-year follow-up at a tertiary epilepsy center. Epilepsia 2024. [PMID: 39056373 DOI: 10.1111/epi.18062] [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: 02/16/2024] [Revised: 07/02/2024] [Accepted: 07/02/2024] [Indexed: 07/28/2024]
Abstract
OBJECTIVE This study was undertaken to develop a model and perform a preliminary internal validation study of the Scale for Objective Diagnostic Components of Paroxysmal Events (STAMP). METHODS We developed STAMP, which builds on the International League Against Epilepsy task force scale for functional seizures with additional categories for epileptic seizures and syncope. We included 200 consecutive referrals to a Dutch tertiary epilepsy center to evaluate seizurelike events. We recorded demographic and clinical data and collected the clinical evaluation at referral and after 3, 6, 9, and 12 months of follow-up. We ascertained the STAMP at each time point and evaluated factors predicting an improvement in STAMP grade during follow-up. RESULTS Of the 200 referrals at baseline, 131 were classified as having epileptic seizures, 17 as functional seizures, and three as syncope, and 49 were unclassifiable. STAMP grade at baseline was 4 (absent) in 56 individuals, 3 (circumstantial) in 78, 2 (clinically established) in six, and 1 (documented) in 11. Over time, 62 cases STAMP grades improved, and 23 remained unclassifiable. A refinement of STAMP grade during follow-up was due to successful event recordings in 34 people (30 video-electroencephalographic [EEG] recordings, four tilt table testing), home videos or clinician-witnessed events in 13, and identification of interictal EEG or magnetic resonance imaging abnormalities in seven. An improved STAMP grade after 12 months of follow-up was significantly more likely in those with higher event frequency, unclassifiable events, longer event duration, and a shorter time since the first event and less likely in those with a history suggestive of seizures. SIGNIFICANCE This epilepsy service evaluation underscores the crucial role of event recording in improving diagnostic certainty. STAMP may be used to monitor diagnostic performance over time but requires further validation.
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Affiliation(s)
- Daniel Aaftink
- Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, the Netherlands
- Medische Kliniek Velsen, Velsen-Noord, the Netherlands
| | - Jaap C Reijneveld
- Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, the Netherlands
| | - Frederik de Lange
- Department of Cardiology, Amsterdam University Medical Center, Amsterdam, the Netherlands
| | - Josemir W Sander
- Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, the Netherlands
- UCL Queen Square Institute of Neurology and Chalfont Centre for Epilepsy, London, UK
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, China
| | - Roland D Thijs
- Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, the Netherlands
- UCL Queen Square Institute of Neurology and Chalfont Centre for Epilepsy, London, UK
- Department of Neurology, Leiden University Medical Center, Leiden, the Netherlands
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van der Stam AH, de Vries NM, Shmuely S, Smeenk D, Rutten JH, van Rossum IA, de Bot ST, Claassen JA, Bloem BR, Thijs RD. Study protocol for the Heads-Up trial: a phase II randomized controlled trial investigating head-up tilt sleeping to alleviate orthostatic intolerance in Parkinson's Disease and parkinsonism. BMC Neurol 2024; 24:4. [PMID: 38166676 PMCID: PMC10759619 DOI: 10.1186/s12883-023-03506-x] [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: 11/14/2023] [Accepted: 12/12/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND In persons with Parkinson's Disease (PD) or certain forms of atypical parkinsonism, orthostatic hypotension is common and disabling, yet often underrecognized and undertreated. About half of affected individuals also exhibit supine hypertension. This common co-occurrence of both orthostatic hypotension and supine hypertension complicates pharmacological treatments as the treatment of the one can aggravate the other. Whole-body head-up tilt sleeping (HUTS) is the only known intervention that may improve both. Evidence on its effectiveness and tolerability is, however, lacking, and little is known about the implementability. METHODS In this double-blind multicenter randomized controlled trial (phase II) we will test the efficacy and tolerability of HUTS at different angles in 50 people with PD or parkinsonism who have both symptomatic orthostatic hypotension and supine hypertension. All participants start with one week of horizontal sleeping and subsequently sleep at three different angles, each maintained for two weeks. The exact intervention will vary between the randomly allocated groups. Specifically, the intervention group will consecutively sleep at 6°, 12° and 18°, while the delayed treatment group starts with a placebo angle (1°), followed by 6° and 12°. We will evaluate tolerability using questionnaires and compliance to the study protocol. The primary endpoint is the change in average overnight blood pressure measured by a 24-hour ambulatory blood pressure recording. Secondary outcomes include orthostatic blood pressure, orthostatic tolerance, supine blood pressure, nocturia and various other motor and non-motor tests and questionnaires. DISCUSSION We hypothesize that HUTS can simultaneously alleviate orthostatic hypotension and supine hypertension, and that higher angles of HUTS are more effective but less tolerable. The Heads-Up trial will help to clarify the effectiveness, tolerability, and feasibility of this intervention at home and can guide at-home implementation. TRIAL REGISTRATION ClinicalTrials.gov NCT05551377; Date of registration: September 22, 2022.
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Affiliation(s)
- Amber H van der Stam
- Donders Institute for Brain Cognition and Behavior, Department of Neurology, Center of Expertise for Parkinson & Movement Disorders, Radboud University Medical Centre, Nijmegen, The Netherlands.
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands.
| | - Nienke M de Vries
- Donders Institute for Brain Cognition and Behavior, Department of Neurology, Center of Expertise for Parkinson & Movement Disorders, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Sharon Shmuely
- Donders Institute for Brain Cognition and Behavior, Department of Neurology, Center of Expertise for Parkinson & Movement Disorders, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Daan Smeenk
- Donders Institute for Brain Cognition and Behavior, Department of Neurology, Center of Expertise for Parkinson & Movement Disorders, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Joost H Rutten
- Department of Internal medicine, Division of Vascular medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Ineke A van Rossum
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Susanne T de Bot
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Jurgen A Claassen
- Department of Geriatric medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Bastiaan R Bloem
- Donders Institute for Brain Cognition and Behavior, Department of Neurology, Center of Expertise for Parkinson & Movement Disorders, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Roland D Thijs
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
- Stichting Epilepsie Instellingen Nederland (SEIN), Hoofddorp, The Netherlands
- UCL Queen Square Institute of Neurology, University College London, London, UK
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Wouda MF, Bengtson EI, Høyer E, Wesche AP, Jørgensen V. Acute orthostatic responses during early mobilisation of patients with acquired brain injury - Innowalk pro versus standing frame. J Rehabil Assist Technol Eng 2024; 11:20556683241240488. [PMID: 38737723 PMCID: PMC11088804 DOI: 10.1177/20556683241240488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 03/04/2024] [Indexed: 05/14/2024] Open
Abstract
Introduction Early mobilisation is paramount in the rehabilitation of patients with acquired brain injuries. However, the effectiveness of mobilisation to standing combined with passive leg movement in mitigating orthostatic intolerance remains uncertain. Hence, we investigated whether participants exhibited better tolerance standing in a motorized standing device with passive leg movements, Innowalk Pro, compared to a traditional standing frame. Methods 17 patients with acquired brain injury (<1 year post-injury) performed two sessions in each standing device on four separate days. Maximum standing time was 30 min, less when symptoms of syncope or volitional exhaustion occurred. Besides total standing time, electromyography of thigh muscles, and changes in mean arterial pressure and heart rate were monitored at rest and during standing. Results No significant differences were found in standing time, changes in mean arterial pressure or heart rate between standing in Innowalk Pro and the standing frame. However, participants had significantly more thigh muscle activation (p = 0.006) when standing in Innowalk Pro. Conclusions Mobilising participants with a subacute acquired brain injury in a standing frame with motorised passive movements of the lower limbs did, despite higher thigh muscle activation, not lead to better orthostatic tolerance or prolonged standing time compared to a traditional standing frame.
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Affiliation(s)
- Matthijs F Wouda
- Research Department, Sunnaas Rehabilitation Hospital, Nesoddtangen, Norway
- Oslo Metropolitan University, Oslo, Norway
| | - Espen I Bengtson
- Research Department, Sunnaas Rehabilitation Hospital, Nesoddtangen, Norway
| | - Ellen Høyer
- Research Department, Sunnaas Rehabilitation Hospital, Nesoddtangen, Norway
| | - Alhed P Wesche
- Research Department, Sunnaas Rehabilitation Hospital, Nesoddtangen, Norway
| | - Vivien Jørgensen
- Research Department, Sunnaas Rehabilitation Hospital, Nesoddtangen, Norway
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Ludwig B, Olbert E, Trimmel K, Seidel S, Rommer PS, Müller C, Struhal W, Berger T. [Myalgic encephalomyelitis/chronic fatigue syndrome: an overview of current evidence]. DER NERVENARZT 2023; 94:725-733. [PMID: 36695893 PMCID: PMC9875188 DOI: 10.1007/s00115-022-01431-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 09/13/2022] [Indexed: 01/26/2023]
Abstract
Over the past 5 years both media and scientific interest has surged regarding the disorder myalgic encephalomyelitis and chronic fatigue syndrome (ME/CFS), not least because of the clinically similar manifestation in long COVID or post-COVID. In this review we discuss the process of clinical diagnosis and randomized controlled therapeutic studies on ME/CFS, and the similarities or differences to long COVID and post-COVID. So far, neither clear pathophysiologically causal nor therapeutic evidence-based results on ME/CFS have been identified in the many years of scientific research. Given the evident psychiatric comorbidity rates in patients with a diagnosis of ME/CFS, a psychosomatic etiology of this syndrome should be considered. Furthermore, a precise and reliable diagnostic classification based on stricter criteria would benefit both pathophysiological and therapeutic research.
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Affiliation(s)
- Birgit Ludwig
- Universitätsklinik für Neurologie, Medizinische Universität Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich
| | - Elisabeth Olbert
- Universitätsklinik für Neurologie, Karl Landsteiner Privatuniversität für Gesundheitswissenschaften, Tulln, Österreich
| | - Karin Trimmel
- Universitätsklinik für Neurologie, Medizinische Universität Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich
| | - Stefan Seidel
- Universitätsklinik für Neurologie, Medizinische Universität Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich
| | - Paulus S Rommer
- Universitätsklinik für Neurologie, Medizinische Universität Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich.
| | - Christian Müller
- Universitätsklinik für Neurologie, Medizinische Universität Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich
| | - Walter Struhal
- Universitätsklinik für Neurologie, Karl Landsteiner Privatuniversität für Gesundheitswissenschaften, Tulln, Österreich
| | - Thomas Berger
- Universitätsklinik für Neurologie, Medizinische Universität Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich
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Kim KT, Lee SU, Kim JB, Choi JY, Kim BJ, Kim JS. Augmented ocular vestibular-evoked myogenic potentials in postural orthostatic tachycardia syndrome. Clin Auton Res 2023; 33:479-489. [PMID: 37115468 DOI: 10.1007/s10286-023-00943-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 04/08/2023] [Indexed: 04/29/2023]
Abstract
PURPOSE To delineate the association between otolith function and changes in mean orthostatic blood pressure (BP) and heart rate (HR) in patients with postural orthostatic tachycardia syndrome (POTS). METHODS Forty-nine patients with POTS were prospectively recruited. We analyzed the results of ocular vestibular-evoked myogenic potentials (oVEMPs) and cervical vestibular-evoked myogenic potentials (cVEMPs), as well as head-up tilt table tests using a Finometer. The oVEMP and cVEMP responses were obtained using tapping stimuli and 110 dB tone-burst sounds, respectively. We measured maximal changes in 5-s averaged systolic BP (SBP), diastolic BP (DBP), and heart rate (HR) within 15 s and during 10 min after tilting. We compared the results with those of 20 age- and sex-matched healthy participants. RESULTS The n1-p1 amplitude of oVEMPs was larger in patients with POTS than in healthy participants (p = 0.001), whereas the n1 latency (p = 0.280) and interaural difference (p = 0.199) did not differ between the two. The n1-p1 amplitude was a positive predictor for POTS (odds ratio 1.07, 95% confidence interval 1.01-1.13, p = 0.025). Body weight (p = 0.007) and n1-p1 amplitude of oVEMP (p = 0.019) were positive predictors for ΔSBP15s in POTS, whereas aging was a negative predictor (p = 0.005). These findings were not observed in healthy participants. CONCLUSIONS Augmented utricular inputs may be associated with a relative predominance of sympathetic over vagal control of BP and HR, especially for an early response during orthostasis in patients with POTS. Overt sympathoexcitation due to exaggerated utricular input and lack of readaptation may be associated with the pathomechanism of POTS.
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Affiliation(s)
- Keun-Tae Kim
- Department of Neurology, Korea University Medical Center, 73 Goryeodae-ro, Seongbuk-gu, Seoul, 02841, South Korea
| | - Sun-Uk Lee
- Department of Neurology, Korea University Medical Center, 73 Goryeodae-ro, Seongbuk-gu, Seoul, 02841, South Korea.
| | - Jung-Bin Kim
- Department of Neurology, Korea University Medical Center, 73 Goryeodae-ro, Seongbuk-gu, Seoul, 02841, South Korea
| | - Jeong-Yoon Choi
- Department of Neurology, Seoul National University College of Medicine, Seoul, South Korea
- Dizziness Center, Clinical Neuroscience Center, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Byung-Jo Kim
- Department of Neurology, Korea University Medical Center, 73 Goryeodae-ro, Seongbuk-gu, Seoul, 02841, South Korea
- BK21 FOUR Program in Learning Health Systems, Korea University, Seoul, South Korea
| | - Ji-Soo Kim
- Department of Neurology, Seoul National University College of Medicine, Seoul, South Korea
- Dizziness Center, Clinical Neuroscience Center, Seoul National University Bundang Hospital, Seongnam, South Korea
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Méchenin M, Fortrat JO. Decision-Making in Patients with Vasovagal Syncope: A Preliminary Study. BIOLOGY 2023; 12:930. [PMID: 37508361 PMCID: PMC10376567 DOI: 10.3390/biology12070930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/19/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023]
Abstract
The aim of this study was to evaluate the differences in performance during a decisional conflict task between subjects with emotional/blood phobia and those with an orthostatic vasovagal syncope. A total of 332 young subjects were included, from which 99 were excluded because of their condition or treatment. The subjects were classified into four groups depending on their responses to a questionnaire: 98 in a control group, 10 in an emotional/blood phobia syncope group, 38 in an orthostatic syncope group, and 87 in an unclear status group. This former group was excluded. The subjects performed a decisional conflict task to quantify their conflict-management ability. The task was the computer version of the Simon Task. Emotional/blood phobia syncope subjects showed a delayed reaction time when faced with decisional conflict in comparison with the control and orthostatic syncope subjects (55.8 ± 17.7 ms, 20.5 ± 4.9 ms, and 13.4 ± 9.2 ms, respectively, p ≤ 0.05). Our result suggests that emotional/blood phobia and orthostatic syncope are two clinical entities. Decisions could be a target of management in patients with emotional/blood phobia syncope. The altered decision-making of subjects with emotion/blood phobia syncope emphasized the role of higher cerebral functions in blood pressure control.
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Affiliation(s)
- Muriel Méchenin
- Equipe CarMe, MITOVASC, SFR ICAT, CNRS, INSERM, Médecine Vasculaire, CHU Angers, Faculty of Medicine, Université d'Angers, 49933 Angers, France
| | - Jacques-Olivier Fortrat
- Equipe CarMe, MITOVASC, SFR ICAT, CNRS, INSERM, Médecine Vasculaire, CHU Angers, Faculty of Medicine, Université d'Angers, 49933 Angers, France
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Evaluation of autonomic nervous system functions by using tilt table test and heart rate variability in epileptic children. MARMARA MEDICAL JOURNAL 2023. [DOI: 10.5472/marumj.1244552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Objective: The value of head-up tilt test (HUTT) for differential diagnosis of epilepsy and the autonomic nervous system functions in
epileptic children using heart rate variability (HRV) are studied.
Patients and Methods: The study group consisted of 16 children with idiopatic/criptogenic epilepsy and 12 controls. Heart rate, PR
interval, corrected QT (QTc) interval, QT and QTc dispersion were calculated using 12-lead electrocardiogram (ECG), HRV analysis
was performed using the Holter recordings obtained both during HUTT and throughout the day. Time domain parameters, standard
deviation of all RR intervals (SDNN), the standard deviation of mean NN intervals in five-minutes recording (SDANN), mean standard
deviation of NN intervals in five-minutes recordings (SDNNi), root mean square of successive differences (RMSSD), count divided
by the total number of all NN intervals (pNN50) and frequency domain parameters low frequency (LF), high frequency (HF), lowfrequency/
high-frequency ratio (LF/HF) were calculated in both and compared between the two groups.
Results: Head-up tilt test was positive in 4 epileptic children (25%), none of controls were positive. The heart rate of the patients were
higher than the controls (p=0.015). LF/HF ratio in 24-hour Holter recordings, were significantly lower (1.13±0.6, 1.83±0.7 respectively,
p=0.002); the SDANN during HUTT (28.7±20.2, 18.2 ± 19.9 respectively, p=0.024) were significantly higher in the patients than the
controls.
Conclusion: Head-up tilt test positivity is frequent in epileptic children, and cannot be used in differential diagnosis. HRV calculated
both from 24 hour Holter recordings and Holter recordings under orthostatic stress were impaired in favour of parasympathetic
system in epileptic children.
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Utricular dysfunction in patients with orthostatic hypotension. Clin Auton Res 2022; 32:431-444. [PMID: 36074194 DOI: 10.1007/s10286-022-00890-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 08/22/2022] [Indexed: 01/31/2023]
Abstract
PURPOSE To delineate the association between otolithic dysfunction and orthostatic hypotension (OH). METHODS We retrospectively reviewed the medical records of 382 patients who presented with orthostatic dizziness at a tertiary dizziness center between July 2017 and December 2021. Patients were included for analyses when they had completed ocular (oVEMP) and/or cervical vestibular-evoked myogenic potentials (cVEMP), and head-up tilt table test with a Finometer (n = 155). We compared the results between the patients with OH (n = 38) and those with NOI (normal head-up tilt table test despite orthostatic intolerance, n = 117). RESULTS Thirty-eight patients with OH were further categorized as either classic (n = 30), delayed (n = 7), or initial (n = 1) types. Multivariable logistic regression showed that OH was associated with high baseline systolic BP (p = 0.046), presence of heart failure (p = 0.016), and unilateral oVEMP abnormalities (p = 0.016). n1 latency of oVEMP were negatively correlated with the maximal changes of systolic blood pressure (BP) in 15 s ([Formula: see text]SBP15s, p = 0.013), 3 min ([Formula: see text]SBP3min, p = 0.005) and 10 min ([Formula: see text]SBP10min, p = 0.002). In contrast, the n1-p1 amplitude was positively correlated with [Formula: see text]SBP15s (p = 0.029). Meanwhile, p13 latency of cVEMP was negatively correlated with [Formula: see text]SBP10min (p = 0.018). CONCLUSIONS Our study provides evidence of utricular dysfunction related to OH.
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Abstract
Multiple system atrophy (MSA) is a rare neurodegenerative disease that is characterized by neuronal loss and gliosis in multiple areas of the central nervous system including striatonigral, olivopontocerebellar and central autonomic structures. Oligodendroglial cytoplasmic inclusions containing misfolded and aggregated α-synuclein are the histopathological hallmark of MSA. A firm clinical diagnosis requires the presence of autonomic dysfunction in combination with parkinsonism that responds poorly to levodopa and/or cerebellar ataxia. Clinical diagnostic accuracy is suboptimal in early disease because of phenotypic overlaps with Parkinson disease or other types of degenerative parkinsonism as well as with other cerebellar disorders. The symptomatic management of MSA requires a complex multimodal approach to compensate for autonomic failure, alleviate parkinsonism and cerebellar ataxia and associated disabilities. None of the available treatments significantly slows the aggressive course of MSA. Despite several failed trials in the past, a robust pipeline of putative disease-modifying agents, along with progress towards early diagnosis and the development of sensitive diagnostic and progression biomarkers for MSA, offer new hope for patients.
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Leys F, Fanciulli A. The extended role of 24 h ambulatory blood pressure monitoring for reflex syncope. Eur Heart J 2022; 43:3777-3780. [PMID: 35924302 DOI: 10.1093/eurheartj/ehac409] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Fabian Leys
- Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
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Dani M, Taraborrelli P, Panagopoulos D, Dirksen A, Torocastro M, Sutton R, Lim PB. New horizons in the ageing autonomic nervous system: orthostatic hypotension and supine hypertension. Age Ageing 2022; 51:6653480. [PMID: 35930723 PMCID: PMC9724614 DOI: 10.1093/ageing/afac150] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Indexed: 01/25/2023] Open
Abstract
Blood pressure regulation is an automatic, moment-by-moment buffering of the blood pressure in response to physiological changes such as orthostasis, exercise and haemorrhage. This finely orchestrated reflex is called the baroreflex. It is a regulated arc of afferent, central and efferent arms. Multiple physiological changes occur with ageing that can disrupt this reflex, making blood pressure regulation less effective. In addition, multiple changes can occur with ageing-related diseases such as neurodegeneration, atherosclerosis, deconditioning and polypharmacy. These changes commonly result in orthostatic hypotension, hypertension or both, and are consistently associated with multiple adverse outcomes. In this article, we discuss the healthy baroreflex, and physiological and pathophysiological reasons for impaired baroreflex function in older people. We discuss why the common clinical manifestations of orthostatic hypotension and concomitant supine hypertension occur, and strategies for balancing these conflicting priorities. Finally, we discuss strategies for treating them, outlining our practice alongside consensus and expert guidance.
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Affiliation(s)
- Melanie Dani
- Address correspondence to: Melanie Dani, Imperial Syncope Unit, Hammersmith Hospital, London W12 0HS, UK.
| | | | | | - Andreas Dirksen
- Imperial Syncope Unit, Imperial College Healthcare NHS Trust, London W12 0HS, UK
| | - Miriam Torocastro
- Imperial Syncope Unit, Imperial College Healthcare NHS Trust, London W12 0HS, UK
| | - Richard Sutton
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Phang Boon Lim
- Imperial Syncope Unit, Imperial College Healthcare NHS Trust, London W12 0HS, UK
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Wenning GK, Stankovic I, Vignatelli L, Fanciulli A, Calandra‐Buonaura G, Seppi K, Palma J, Meissner WG, Krismer F, Berg D, Cortelli P, Freeman R, Halliday G, Höglinger G, Lang A, Ling H, Litvan I, Low P, Miki Y, Panicker J, Pellecchia MT, Quinn N, Sakakibara R, Stamelou M, Tolosa E, Tsuji S, Warner T, Poewe W, Kaufmann H. The Movement Disorder Society Criteria for the Diagnosis of Multiple System Atrophy. Mov Disord 2022; 37:1131-1148. [PMID: 35445419 PMCID: PMC9321158 DOI: 10.1002/mds.29005] [Citation(s) in RCA: 257] [Impact Index Per Article: 128.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/25/2022] [Accepted: 02/28/2022] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The second consensus criteria for the diagnosis of multiple system atrophy (MSA) are widely recognized as the reference standard for clinical research, but lack sensitivity to diagnose the disease at early stages. OBJECTIVE To develop novel Movement Disorder Society (MDS) criteria for MSA diagnosis using an evidence-based and consensus-based methodology. METHODS We identified shortcomings of the second consensus criteria for MSA diagnosis and conducted a systematic literature review to answer predefined questions on clinical presentation and diagnostic tools relevant for MSA diagnosis. The criteria were developed and later optimized using two Delphi rounds within the MSA Criteria Revision Task Force, a survey for MDS membership, and a virtual Consensus Conference. RESULTS The criteria for neuropathologically established MSA remain unchanged. For a clinical MSA diagnosis a new category of clinically established MSA is introduced, aiming for maximum specificity with acceptable sensitivity. A category of clinically probable MSA is defined to enhance sensitivity while maintaining specificity. A research category of possible prodromal MSA is designed to capture patients in the earliest stages when symptoms and signs are present, but do not meet the threshold for clinically established or clinically probable MSA. Brain magnetic resonance imaging markers suggestive of MSA are required for the diagnosis of clinically established MSA. The number of research biomarkers that support all clinical diagnostic categories will likely grow. CONCLUSIONS This set of MDS MSA diagnostic criteria aims at improving the diagnostic accuracy, particularly in early disease stages. It requires validation in a prospective clinical and a clinicopathological study. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
| | - Iva Stankovic
- Neurology Clinic, University Clinical Center of Serbia, Faculty of Medicine, University of BelgradeBelgradeSerbia
| | - Luca Vignatelli
- IRCCS, Istituto delle Scienze Neurologiche di BolognaBolognaItaly
| | | | - Giovanna Calandra‐Buonaura
- IRCCS, Istituto delle Scienze Neurologiche di BolognaBolognaItaly
- Department of Biomedical and Neuromotor SciencesUniversity of BolognaBolognaItaly
| | - Klaus Seppi
- Department of NeurologyInnsbruck Medical UniversityInnsbruckAustria
| | - Jose‐Alberto Palma
- Department of Neurology, Dysautonomia Center, Langone Medical CenterNew York University School of MedicineNew YorkNew YorkUSA
| | - Wassilios G. Meissner
- French Reference Center for MSA, Department of Neurology for Neurodegenerative DiseasesUniversity Hospital Bordeaux, 33076 Bordeaux and Institute of Neurodegenerative Diseases, University Bordeaux, CNRSBordeauxFrance
- Department of MedicineUniversity of Otago, Christchurch, and New Zealand Brain Research InstituteChristchurchNew Zealand
| | - Florian Krismer
- Department of NeurologyInnsbruck Medical UniversityInnsbruckAustria
| | - Daniela Berg
- Department of Neurodegeneration and Hertie‐Institute for Clinical Brain ResearchUniversity of TübingenTübingenGermany
- Department of NeurologyChristian‐Albrechts‐University KielKielGermany
| | - Pietro Cortelli
- IRCCS, Istituto delle Scienze Neurologiche di BolognaBolognaItaly
- Department of Biomedical and Neuromotor SciencesUniversity of BolognaBolognaItaly
| | - Roy Freeman
- Department of Neurology, Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMassachusettsUSA
| | - Glenda Halliday
- Brain and Mind Centre, Faculty of Medicine and HealthSchool of Medical Sciences, The University of SydneySydneyNew South WalesAustralia
| | - Günter Höglinger
- Department of NeurologyHanover Medical SchoolHanoverGermany
- German Center for Neurodegenerative DiseasesMunichGermany
| | - Anthony Lang
- Edmond J. Safra Program in Parkinson's DiseaseUniversity Health Network and the Division of Neurology, University of TorontoTorontoCanada
| | - Helen Ling
- Queen Square Brain Bank for Neurological Disorders, UCL Queen Square Institute of NeurologyLondonUnited Kingdom
- Reta Lila Weston Institute of Neurological StudiesUCL Queen Square Institute of NeurologyLondonUnited Kingdom
| | - Irene Litvan
- Department of NeurosciencesParkinson and Other Movement Disorders Center, University of CaliforniaSan DiegoCaliforniaUSA
| | - Phillip Low
- Department of NeurologyMayo ClinicRochesterMinnesotaUSA
| | - Yasuo Miki
- Queen Square Brain Bank for Neurological Disorders, UCL Queen Square Institute of NeurologyLondonUnited Kingdom
- Department of NeuropathologyInstitute of Brain Science, Hirosaki University Graduate School of MedicineHirosakiJapan
| | - Jalesh Panicker
- UCL Queen Square Institute of NeurologyLondonUnited Kingdom
- Department of Uro‐NeurologyThe National Hospital for Neurology and Neurosurgery, Queen SquareLondonUnited Kingdom
| | - Maria Teresa Pellecchia
- Department of MedicineSurgery and Dentistry “Scuola Medica Salernitana”, Neuroscience Section, University of SalernoSalernoItaly
| | - Niall Quinn
- UCL Queen Square Institute of NeurologyLondonUnited Kingdom
| | - Ryuji Sakakibara
- Neurology, Internal MedicineSakura Medical Center, Toho UniversitySakuraJapan
| | - Maria Stamelou
- Parkinson's Disease and Movement Disorders DepartmentHYGEIA Hospital, and Aiginiteion Hospital, University of AthensAthensGreece
- Philipps University Marburg, Germany and European University of CyprusNicosiaCyprus
| | - Eduardo Tolosa
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED) Hospital Clínic, IDIBAPS, Universitat de BarcelonaCataloniaSpain
- Movement Disorders Unit, Neurology ServiceHospital Clínic de BarcelonaCataloniaSpain
| | - Shoji Tsuji
- Department of Molecular NeurologyThe University of Tokyo, Graduate School of MedicineTokyoJapan
- International University of Health and WelfareChibaJapan
| | - Tom Warner
- Queen Square Brain Bank for Neurological Disorders, UCL Queen Square Institute of NeurologyLondonUnited Kingdom
| | - Werner Poewe
- Department of NeurologyInnsbruck Medical UniversityInnsbruckAustria
| | - Horacio Kaufmann
- Department of Neurology, Dysautonomia Center, Langone Medical CenterNew York University School of MedicineNew YorkNew YorkUSA
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Xing Y, Li Q, Xu E, Zeng J, Li Q, Mei S, Hua Y. Impaired Cerebral Autoregulation in Parkinson's Disease: An Orthostatic Hypotension Analysis. Front Neurol 2022; 13:811698. [PMID: 35370873 PMCID: PMC8971280 DOI: 10.3389/fneur.2022.811698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 02/18/2022] [Indexed: 11/16/2022] Open
Abstract
Orthostatic hypotension (OH) is an early non-motor manifestation of Parkinson's disease (PD). However, the underlying mechanism of hemodynamic changes in patients with PD and OH remains unclear. This study aimed to investigate the dynamic cerebral autoregulation changes in patients with PD with OH. Ninety patients with PD and 20 age- and sex-matched healthy controls (HCs) were recruited. The patients' non-invasive blood pressure (BP) and cerebral blood flow velocity were simultaneously recorded at supine and orthostatic positions during the active standing test (AST). Transfer function analysis was used to determine autoregulatory parameters including gain [i.e., damping effect of dynamic cerebral autoregulation (dCA) on the magnitude of BP oscillation] and phase difference (i.e., the time delay of the cerebral blood flow response to BP). Sixteen patients (17.8%) in the PD population were diagnosed with OH (PD-OH). The AST results were normal for 74 patients (82.2%) (PD-NOR). In the supine position, the PD-OH group had a lower phase degree than the PD-NOR group (50.3 ± 23.4 vs. 72.6 ± 32.2 vs. 68.9 ± 12.1, p = 0.020); however, no significant difference was found upon comparing with the HC group. In the orthostatic position, the normalized gain was significantly higher for the symptomatic OH group than for the asymptomatic OH group and HC group (1.50 ± 0.58 vs. 0.97 ± 0.29 vs. 1.10 ± 0.31, p = 0.019). A symptomatic OH in the PD population indicates an impaired cerebral autoregulation ability in the orthostatic position. Cerebral autoregulation tends to be impaired in the supine position in the OH population.
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Affiliation(s)
- Yingqi Xing
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China
- Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Qing Li
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China
- Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Erhe Xu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jingrong Zeng
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Qiuping Li
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China
- Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Shanshan Mei
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yang Hua
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China
- Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
- *Correspondence: Yang Hua
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15
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Cardiac sympathetic innervation in Parkinson's disease versus multiple system atrophy. Clin Auton Res 2022; 32:103-114. [PMID: 35149937 PMCID: PMC9064856 DOI: 10.1007/s10286-022-00853-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 01/20/2022] [Indexed: 12/17/2022]
Abstract
Purpose The aims of this study were to evaluate the diagnostic accuracy of the dual imaging method combining cardiac iodine-123-metaiodobenzylguanidine single-photon emission computed tomography combined with low-dose chest computed tomography compared to routine cardiac scintigraphy, and assess regional differences in tracer distribution and the relationships between imaging and autonomic function in Parkinson’s disease and multiple system atrophy. Methods A prospective study including 19 Parkinson’s disease and 12 multiple system atrophy patients was performed. Patients underwent clinical evaluation, iodine-123-metaiodobenzylguanidine single-photon emission computed tomography combined with chest computed tomography, planar scintigraphy, and cardiovascular autonomic function tests. Results Co-registration of single-photon emission computed tomography and chest computed tomography resulted in three groups with distinct patterns of tracer uptake: homogeneous, non-homogeneously reduced and absent. There was a significant difference in group allocation among patients with multiple system atrophy and Parkinson’s disease (p = 0.001). Most multiple system atrophy patients showed homogeneous uptake, and the majority of Parkinson’s disease patients showed absent cardiac tracer uptake. We identified a pattern of heterogeneous cardiac tracer uptake in both diseases with reductions in the apex and the lateral myocardial wall. Sympathetic dysfunction reflected by a missing blood pressure overshoot during Valsalva manoeuvre correlated with cardiac tracer distribution in Parkinson’s disease patients (p < 0.001). Conclusions The diagnostic accuracy of the dual imaging method and routine cardiac scintigraphy were similar. Anatomical tracer allocation provided by the dual imaging method of cardiac iodine-123-metaiodobenzylguanidine single-photon emission computed tomography and chest computed tomography identified a heterogeneous subgroup of Parkinson’s disease and multiple system atrophy patients with reduced cardiac tracer uptake in the apex and the lateral wall. Sympathetic dysfunction correlated with cardiac imaging in Parkinson’s disease patients.
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16
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Leys F, Wenning GK, Fanciulli A. The role of cardiovascular autonomic failure in the differential diagnosis of α-synucleinopathies. Neurol Sci 2021; 43:187-198. [PMID: 34817726 PMCID: PMC8724069 DOI: 10.1007/s10072-021-05746-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 10/22/2021] [Indexed: 12/17/2022]
Abstract
The α-synucleinopathies comprise a group of adult-onset neurodegenerative disorders including Parkinson’s disease (PD), multiple system atrophy (MSA), dementia with Lewy bodies (DLB,) and — as a restricted non-motor form — pure autonomic failure (PAF). Neuropathologically, the α-synucleinopathies are characterized by aggregates of misfolded α-synuclein in the central and peripheral nervous system. Cardiovascular autonomic failure is a common non-motor symptom in people with PD, a key diagnostic criterion in MSA, a supportive feature for the diagnosis of DLB and disease-defining in PAF. The site of autonomic nervous system lesion differs between the α-synucleinopathies, with a predominantly central lesion pattern in MSA versus a peripheral one in PD, DLB, and PAF. In clinical practice, overlapping autonomic features often challenge the differential diagnosis among the α-synucleinopathies, but also distinguish them from related disorders, such as the tauopathies or other neurodegenerative ataxias. In this review, we discuss the differential diagnostic yield of cardiovascular autonomic failure in individuals presenting with isolated autonomic failure, parkinsonism, cognitive impairment, or cerebellar ataxia.
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Affiliation(s)
- Fabian Leys
- Division of Neurobiology, Department of Neurology, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, 6020, Austria
| | - Gregor K Wenning
- Division of Neurobiology, Department of Neurology, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, 6020, Austria
| | - Alessandra Fanciulli
- Division of Neurobiology, Department of Neurology, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, 6020, Austria.
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17
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van Dijk JG, van Rossum IA, Thijs RD. The pathophysiology of vasovagal syncope: Novel insights. Auton Neurosci 2021; 236:102899. [PMID: 34688189 DOI: 10.1016/j.autneu.2021.102899] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/11/2021] [Accepted: 10/14/2021] [Indexed: 12/16/2022]
Abstract
The pathophysiology of vasovagal syncope (VVS) is reviewed, focusing on hemodynamic aspects. Much more is known about orthostatic than about emotional VVS, probably because the former can be studied using a tilt table test (TTT). Recent advances made it possible to quantify the relative contributions of the three factors that control blood pressure: heart rate (HR), stroke volume (SV) and total peripheral resistance (TPR). Orthostatic VVS starts with venous pooling, reflected in a decrease of SV. This is followed by cardioinhibition (CI), which is a decrease of HR that accelerates the ongoing decrease of BP, making the start of CI a literal as well as fundamental turning point. The role of hormonal and other humoral factors, respiration and of psychological influences is reviewed in short, leading to the conclusion that a multidisciplinary approach to the study of the pathophysiology of VVS may yield new insights.
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Affiliation(s)
- J Gert van Dijk
- Department of Neurology, Leiden University Medical Centre, Leiden, the Netherlands.
| | - Ineke A van Rossum
- Department of Neurology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Roland D Thijs
- Department of Neurology, Leiden University Medical Centre, Leiden, the Netherlands; Stichting Epilepsie Instellingen Nederland, Heemstede, the Netherlands
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18
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van Dijk JG, Thijs RD. Rethinking neurological attitudes towards vasovagal syncope: The European Federation of Autonomic Societies (EFAS) recommendations regarding tilt table testing. Eur J Neurol 2021; 28:e69-e70. [PMID: 34117676 DOI: 10.1111/ene.14963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 05/18/2021] [Indexed: 11/30/2022]
Affiliation(s)
- J Gert van Dijk
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Roland D Thijs
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands.,Stichting Epilepsie Instellingen Nederland, Heemstede, The Netherlands
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19
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Ghariq M, Kerkhof FI, Reijntjes RH, Thijs RD, van Dijk JG. New hemodynamic criteria to separate classical orthostatic hypotension from vasovagal syncope. Ann Clin Transl Neurol 2021; 8:1635-1645. [PMID: 34166574 PMCID: PMC8351382 DOI: 10.1002/acn3.51412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/20/2021] [Accepted: 06/07/2021] [Indexed: 11/08/2022] Open
Abstract
OBJECTIVE To define and evaluate hemodynamic criteria to distinguish between classical orthostatic hypotension (cOH) and vasovagal syncope (VVS) in tilt table testing (TTT). METHODS Inclusion criteria for VVS were a history of VVS and tilt-induced syncope defined as a blood pressure (BP) decrease and electroencephalographic changes during syncope with complaint recognition. Criteria for cOH were a history of cOH and a BP decrease meeting published criteria. Clinical diagnoses were established prior to TTT. We assessed (1) whether the decrease of systolic BP accelerated, "convex," or decelerated, "concave"; (2) the time from head-up tilt to when BP reached one-half its maximal decrease; (3) the difference between baseline heart rate (HR) and HR at BP nadir. We calculated the diagnostic yield of optimized thresholds of these features and their combinations. RESULTS We included 82 VVS cases (40% men, median age 44 years) and 65 cOH cases (66% men, median age 70 years). BP decrease was concave in cOH in 79% and convex in VVS in 94% (p < 0.001). The time to reach half the BP decrease was shorter in cOH (median 34 sec, interquartile range (IQR) 19-98 sec) than in VVS (median 1571 sec, IQR 1381-1775 sec, p < 0.001). Mean HR increased by 11 ± 11 bpm in cOH and decreased by 20 ± 19 bpm in VVS (p < 0.001). When all three features pointed to VVS, sensitivity for VVS was 82% and specificity was 100%. When all three pointed to cOH, sensitivity for cOH was 71% and specificity was 100%. INTERPRETATION These new hemodynamic criteria reliably differentiate cOH from VVS.
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Affiliation(s)
- Maryam Ghariq
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Fabian I Kerkhof
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Robert H Reijntjes
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Roland D Thijs
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands.,Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, The Netherlands.,NIHR University College London Hospitals Biomedical Research Centre, London, United Kingdom
| | - J Gert van Dijk
- Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands
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