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Transcranial sonography

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https://www.readbyqxmd.com/read/28320115/reversible-cerebral-vasoconstriction-syndrome-in-puerperium-a-prospective-study
#1
Gian Paolo Anzola, Renato Brighenti, Milena Cobelli, Alessia Giossi, Sara Mazzucco, Silvia Olivato, Elisa Pari, Maria Paola Piras, Alessandro Padovani, Fabrizio Rinaldi, Giulia Turri
BACKGROUND AND AIM OF THE STUDY: Reversible cerebral vasoconstriction syndrome (RCVS) is characterized by severe "thunderclap" headache, with or without associated neurological symptoms and neuroimaging findings of reversible vasoconstriction of cerebral arteries. Puerperium is a recognized precipitant, but the incidence of puerperal RCVS is unknown. We conducted a prospective study to assess incidence, risk factors and clinical features of RCVS. MATERIAL AND METHOD: Nine-hundred consecutive puerperae were prospectively enrolled within three days of delivery...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28289798/-helpful-instrumental-examinations-in-idiopathic-parkinson-s-disease
#2
U Walter, H Zach, I Liepelt-Scarfone, W Maetzler
BACKGROUND: The clinical diagnosis of idiopathic Parkinson's disease (iPD) can be challenging. In these cases, additional diagnostic methods are available that can help to improve diagnostic accuracy. OBJECTIVES, MATERIAL AND METHODS: This article provides an overview of currently available and promising novel ancillary methods for the early and differential diagnosis of iPD. RESULTS: Imaging tools, such as 1.5 Tesla magnetic resonance imaging (MRI) and computed tomography (CT) are mainly used for the differentiation between iPD and symptomatic parkinsonian syndromes (PS)...
March 13, 2017: Der Nervenarzt
https://www.readbyqxmd.com/read/28261152/comparison-between-brain-computed-tomography-scan-and-transcranial-sonography-to-evaluate-third-ventricle-width-peri-mesencephalic-cistern-and-sylvian-fissure-in-traumatic-brain-injured-patients
#3
Raphael A G Oliveira, Marcelo de Oliveira Lima, Wellingson Silva Paiva, Luiz Marcelo de Sá Malbouisson, Manuel Jacobsen Teixeira, Edson Bor-Seng-Shu
INTRODUCTION: Transcranial color-coded duplex sonography (TCCS) may help guide multimodal monitoring in the neurocritical setting. It may provide indirect information about intracranial hypertension, such as midline shift, third ventricle width, and peri-mesencephalic cistern obliteration. We aim to assess the agreement between brain computed tomography scan (CT scan) and TCCS in traumatic brain injury (TBI) patients. METHODS: In this retrospective cross-sectional observational study, TCCS was performed within 6 h before a brain CT scan...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28257237/curative-effect-and-mechanism-of-radiofrequency-ablation-nucleoplasty-in-the-treatment-of-cervical-vertigo
#4
Hai-Dong Yin, Xin-Mei Zhang, Ming-Guang Huang, Wei Chen, Yang Song, Qing-Jun Du, Yu-Ning Wu, Ruo-Bin Yang
OBJECTIVE: This study aims to investigate the curative effects and mechanism of radiofrequency ablation nucleoplasty in the treatment of cervical vertigo. METHODS: A total of 27 patients diagnosed with cervical vertigo from January 2012 to October 2014 received treatment of radiofrequency ablation nucleoplasty. The narrow-side vertebral artery diameters were examined by using Philips 1.5-T body dual-gradient MRI system. The haemodynamic parameters were detected by using transcranial Doppler sonography...
March 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28240783/applications-of-transcranial-color-coded-sonography-in-the-emergency-department
#5
REVIEW
Pablo Blanco, Michael Blaivas
Transcranial color-coded Doppler sonography is a noninvasive bedside ultrasound application that combines both imaging of parenchymal structures and Doppler assessment of intracranial vessels. It may aid in rapid diagnoses and treatment decision making of patients with intracranial emergencies in point-of-care settings. This pictorial essay illustrates the technical aspects and emergency department applications of transcranial color-coded Doppler sonography, and provides some rationale for implementation of this technique into the emergency department practice...
February 27, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28228722/transcranial-doppler-sonography-reveals-reductions-in-hemispheric-asymmetry-in-healthy-older-adults-during-vigilance
#6
Amanda E Harwood, Pamela M Greenwood, Tyler H Shaw
Given that older adults are remaining longer in the workforce, their ability to perform demanding cognitive tasks such as vigilance assignments needs to be thoroughly examined, especially since many vigilance assignments affect public safety (e.g., aviation, medicine and long distance driving). Previous research exploring the relation between aging and vigilance is conflicted, with some studies finding decreased vigilance performance in older adults but others finding no effect of age. We sought a better understanding of effects of age on vigilance by assessing neurophysiological change over the course of a vigil in young (aged 18-24) and healthy older (aged 66-77) adults...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28207907/argon-does-not-affect-cerebral-circulation-or-metabolism-in-male-humans
#7
Frank Grüne, Stephan Kazmaier, Sanne Elisabeth Hoeks, Robert Jan Stolker, Marc Coburn, Andreas Weyland
OBJECTIVE: Accumulating data have recently underlined argon´s neuroprotective potential. However, to the best of our knowledge, no data are available on the cerebrovascular effects of argon (Ar) in humans. We hypothesized that argon inhalation does not affect mean blood flow velocity of the middle cerebral artery (Vmca), cerebral flow index (FI), zero flow pressure (ZFP), effective cerebral perfusion pressure (CPPe), resistance area product (RAP) and the arterio-jugular venous content differences of oxygen (AJVDO2), glucose (AJVDG), and lactate (AJVDL) in anesthetized patients...
2017: PloS One
https://www.readbyqxmd.com/read/28193836/post-subdural-hematoma-transient-ischemic-attacks-hypoperfusion-mechanism-supported-by-quantitative-electroencephalography-and-transcranial-doppler-sonography
#8
Ayham M Alkhachroum, Guadalupe Fernandez-Baca Vaca, Sophia Sundararajan, Michael DeGeorgia
No abstract text is available yet for this article.
February 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28187816/multimodal-neurologic-monitoring
#9
REVIEW
G Korbakis, P M Vespa
Neurocritical care has two main objectives. Initially, the emphasis is on treatment of patients with acute damage to the central nervous system whether through infection, trauma, or hemorrhagic or ischemic stroke. Thereafter, attention shifts to the identification of secondary processes that may lead to further brain injury, including fever, seizures, and ischemia, among others. Multimodal monitoring is the concept of using various tools and data integration to understand brain physiology and guide therapeutic interventions to prevent secondary brain injury...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28181956/extrapyramidal-symptoms-in-schizophrenia-evidence-of-blunted-cerebral-hemodynamics-during-a-planning-task
#10
Daniel Schuepbach, Matthias Michel, Gert Wagner, Stefan Duschek, Sabine C Herpertz
Acute extrapyramidal symptoms (EPS) occur frequently in schizophrenia, mostly caused by antidopaminergic substances. There have been no published reports on the impact of acute EPS on cerebral blood flow (CBF) or related measures. In the following study, we examined schizophrenic patients with and without EPS during a planning task and measurements of CBF velocity. Sixteen patients with chronic schizophrenia and 16 healthy participants performed a planning paradigm during bilateral functional transcranial Doppler sonography of the middle cerebral arteries...
February 8, 2017: International Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28127789/transcranial-doppler-monitoring-in-carotid-endarterectomy-a-systematic-review-and-meta-analysis
#11
Reshmi Udesh, Piruthiviraj Natarajan, Karthy Thiagarajan, Lawrence R Wechsler, Donald J Crammond, Jeffrey R Balzer, Parthasarathy D Thirumala
OBJECTIVES: To evaluate the efficacy of intraoperative transcranial Doppler monitoring in predicting perioperative strokes after carotid endarterectomy (CEA). METHODS: An electronic search of PubMed, Embase, and Web of Science databases was conducted for studies on transcranial Doppler monitoring in CEA published from January 1970 through September 2015. All titles and abstracts were independently screened on the basis of predetermined inclusion criteria, which included randomized clinical trials and prospective or retrospective cohort reviews, patients who underwent CEA with intraoperative transcranial Doppler monitoring (either middle cerebral artery velocity [MCAV] or cerebral microembolic signals [MES]) and postoperative neurologic assessments up to 30 days after the surgery, and studies including an abstract, published in English on adult humans 18 years and older with a sample size of 50 or greater...
January 27, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28108264/iron-accumulation-and-microglia-activation-contribute-to-substantia-nigra-hyperechogenicity-in-the-6-ohda-induced-rat-model-of-parkinson-s-disease
#12
Yaqin Zhu, Bao Wang, Kai Tao, Hengli Yang, Yixiao Wang, Tian Zhou, Yilin Yang, Lijun Yuan, Xi Liu, Yunyou Duan
INTRODUCTION: This study aims to explain the mechanisms for the formation of sonographic features of Parkinson's disease (PD) using a 6-hydroxydopamine (6-OHDA) rat model of PD. The iron chelator deferiprone (DFP) was used in the PD model rat to examine the relationship between iron and the echo signal. METHODS: Rat models were created using stereotactic injections of 6-OHDA. DFP was administered intragastrically. Transcranial sonography (TCS) was performed to observe the substantia nigra (SN) echo signal of the brain...
March 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28094105/sonographic-alteration-of-substantia-nigra-is-related-to-parkinsonism-predominant-course-of-x-linked-dystonia-parkinsonism
#13
Uwe Walter, Raymond Rosales, Alessandro Rocco, Ana Westenberger, Aloysius Domingo, Criscely L Go, Norbert Brüggemann, Christine Klein, Lillian V Lee, Dirk Dressler
INTRODUCTION: X-linked recessive dystonia-parkinsonism (XDP, DYT3) is highly prevalent in the Philippines and manifests with varying phenotype. We sought to evaluate the significance of transcranial brain sonography as a biomarker for parkinsonism-predominant phenotype. METHODS: 90 Filipino participants were enrolled into a cross-sectional study: 39 patients with XDP, 21 asymptomatic first-degree relatives of XDP patients, and 30 healthy control subjects. Echogenicity of the substantia nigra and the lenticular nuclei was digitally quantified...
January 10, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28088127/cerebral-laterality-for-language-is-related-to-adult-salivary-testosterone-levels-but-not-digit-ratio-2d-4d-in-men-a-functional-transcranial-doppler-ultrasound-study
#14
Marietta Papadatou-Pastou, Maryanne Martin
The adequacy of three competing theories of hormonal effects on cerebral laterality are compared using functional transcranial Doppler sonography (fTCD). Thirty-three adult males participated in the study (21 left-handers). Cerebral lateralization was measured by fTCD using an extensively validated word generation task. Adult salivary testosterone (T) and cortisol (C) concentrations were measured by luminescence immunoassay and prenatal T exposure was indirectly estimated by the somatic marker of 2nd to 4th digit length ratio (2D:4D)...
January 11, 2017: Brain and Language
https://www.readbyqxmd.com/read/28025360/patterns-of-cerebral-blood-flow-modulation-during-painful-stimulation-in-fibromyalgia-a-transcranial-doppler-sonography-study
#15
Casandra I Montoro, Stefan Duschek, Cristina Muñóz Ladrón de Guevara, Gustavo A Reyes Del Paso
OBJECTIVE: This study analyzed the temporal dynamics of cerebral blood flow (CBF) modulations, during painful stimulation in fibromyalgia syndrome (FMS), using functional transcranial Doppler sonography. METHOD: Blood flow velocities were recorded bilaterally in the anterior (ACA) and middle (MCA) cerebral arteries of 24 FMS patients and 20 healthy individuals during exposure to painful pressure stimulation. Participants were presented with two stimulation blocks: a) fixed pressure (2...
December 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/27903331/biomarkers-in-prodromal-parkinson-disease-a-qualitative-review
#16
Christine A Cooper, Lama M Chahine
BACKGROUND: Over the past several years, the concept of prodromal Parkinson disease (PD) has been increasingly recognized. This term refers to individuals who do not fulfill motor diagnostic criteria for PD, but who have clinical, genetic, or biomarker characteristics suggesting risk of developing PD in the future. Clinical diagnosis of prodromal PD has low specificity, prompting the need for objective biomarkers with higher specificity. In this qualitative review, we discuss objectively defined putative biomarkers for PD and prodromal PD...
November 2016: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/27898200/transcranial-sonography-in-idiopathic-rem-sleep-behavior-disorder-and-multiple-system-atrophy
#17
Xudong Li, Shuang Xue, Shuhong Jia, Zhi Zhou, Yanan Qiao, Chunlei Hou, Kun Wei, Wenjing Zheng, Pei Rong, Jinsong Jiao
AIM: We investigated preclinical abnormalities as revealed by transcranial sonography (TCS) in patients with idiopathic rapid eye movement sleep behavior disorder (iRBD) compared with those revealed in patients with multiple system atrophy (MSA) or Parkinson's disease (PD) and in normal controls. METHODS: Twenty-two patients with iRBD, 21 patients with MSA, 22 patients with PD, and 21 normal controls were included in this study. All participants underwent one night of video-polysomnography monitoring, and the sleep parameters were analyzed using P olysmith software and by visual analysis...
November 29, 2016: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/27888722/a-pilot-study-on-predictors-of-brainstem-raphe-abnormality-in-patients-with-major-depressive-disorder
#18
Milutin Kostić, Ana Munjiza, Danilo Pesic, Amir Peljto, Ivana Novakovic, Valerija Dobricic, Dusica Lecic Tosevski, Milija Mijajlovic
BACKGROUND: Hypo/anechogenicity of the brainstem raphe (BR) structures has been suggested as a possible transcranial parenchymal sonography (TCS) marker associated with depression. AIM: The aim of this study was to analyze possible association of the abnormal BR echogenicity in patients with major depression when compared to healthy controls, and to evaluate its clinical and genetic correlates. METHODS: TCS was performed in 53 patients diagnosed as major depressive disorder (MDD) without psychotic symptoms and in 54 healthy matched controls...
February 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27857051/elevation-of-the-acth-cortisol-ratio-in-female-opioid-dependent-patients-a-biomarker-of-aging-and-correlate-of-metabolic-and-immune-activation
#19
Albert Stuart Reece, Gary Kenneth Hulse
BACKGROUND: Whilst the hypothalamic-pituitary-adrenal (HPA) Axis is a major stress axis, and is necessarily perturbed in opioid dependency, and stress is a major contributor to aging mechanisms, the HPA axis has not been studied in opioid dependency in an age-dependent manner. OBJECTIVE: Hypothesis - Differences in age dependent levels of HPA components. DESIGN: Cross-sectional comparison of general medical and opioid dependent patients (ODP, GMP)...
September 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/27837189/middle-cerebral-artery-diameter-changes-during-rhythmic-handgrip-exercise-in-humans
#20
J Verbree, Agt Bronzwaer, M A van Buchem, Mjap Daemen, J J van Lieshout, Mjp van Osch
Transcranial Doppler (TCD) sonography is a frequently employed technique for quantifying cerebral blood flow by assuming a constant arterial diameter. Given that exercise increases arterial pressure by sympathetic activation, we hypothesized that exercise might induce a change in the diameter of large cerebral arteries. Middle cerebral artery (MCA) cross-sectional area was assessed in response to handgrip exercise by direct magnetic resonance imaging (MRI) observations. Twenty healthy subjects (11 female) performed three 5 min bouts of rhythmic handgrip exercise at 60% maximum voluntary contraction, alternated with 5 min of rest...
January 1, 2016: Journal of Cerebral Blood Flow and Metabolism
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