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Total 19 results found since Jan 2013.

Influence of Combined Transcranial Direct Current Stimulation and Motor Training on Corticospinal Excitability in Children With Unilateral Cerebral Palsy
Conclusion This proof-of-principle study evaluated the influence of cathodal contralesional tDCS on corticospinal excitability in pediatric participants with UCP. A hypothesized decrease in contralesional excitability was noted in participants in the Active+CIMT group, however, the efficacy of tDCS to modulate corticospinal excitability was not statistically different than the Sham+CIMT group. A more detailed understanding of how tDCS impacts M1 neurophysiology will be essential to inform future clinical trials on the optimal dosing parameters, based on individual brain circuitry, to explore the potential functional benef...
Source: Frontiers in Human Neuroscience - April 23, 2019 Category: Neuroscience Source Type: research

Characterizing the Penumbras of White Matter Hyperintensities and Their Associations With Cognitive Function in Patients With Subcortical Vascular Mild Cognitive Impairment
Conclusion In this study, reduced CBF and FA and increased MD in the inner NAWM layers for both PVWMH and DWMH suggested extensive WM alterations beyond the visible WM lesions commonly observed on clinical MRI of svMCI subjects. CBF penumbras cover more extensive WM at risk than DTI penumbras, suggesting the likelihood that compromised CBF precedes white matter integrity changes, and CBF penumbras may be a potential target for the prevention of further microstructural white matter damage. The imaging parameters investigated, however, did not correlate to cognition. Author Contributions YZ, QX, and XG conceived and desig...
Source: Frontiers in Neurology - April 11, 2019 Category: Neurology Source Type: research

Automated 3-dimensional single beat real-time volume color-flow Doppler echocardiography in children: a validation study of right and left heart flows
Conclusions Stroke volume determined by automated RT-3D-VCFDE is feasible in children and in the right side of the heart. This technique potentially provides a non-invasive alternative to historically invasively acquired hemodynamic data and to cardiac magnetic resonance imaging. Teaser The newest technologic advancements of real-time three-dimensional volume color-flow Doppler echocardiography (3D-RT-VCFDE) are single beat acquisition and automated analysis. Automated 3D-RT-VCFDE has been validated with cardiac magnetic resonance imaging in the left heart of adults. In this study, automated 3D-RT-VCFDE is shown to be feas...
Source: Canadian Journal of Cardiology - March 13, 2018 Category: Cardiology Source Type: research

Functional MRI of Letter Cancellation Task Performance in Older Adults
Conclusion The present work is the first to identify neural correlates of the LCT using fMRI and tablet technology in a healthy aging population. Across all ages, the activation was found to be bilateral, including in the cerebellum, superior temporal lobe, precentral gyrus, frontal gyrus, and various occipital and parietal areas. With increasing age, performance generally decreased and brain activity was reduced in the supplementary motor area, middle and inferior frontal gyrus, middle occipital gyrus, putamen and cerebellum. Better LCT performance was correlated with increased activity in the middle frontal gyrus, and r...
Source: Frontiers in Human Neuroscience - April 15, 2019 Category: Neuroscience Source Type: research

Automated 3-Dimensional Single-Beat Real-Time Volume Colour Flow Doppler Echocardiography in Children: A Validation Study of Right and Left Heart Flows
Conclusions Stroke volume determined using automated 3D-RT-VCFDE is feasible in children and in the right side of the heart. This technique potentially provides a noninvasive alternative to historically invasively acquired hemodynamic data and to cardiac magnetic resonance imaging.
Source: Canadian Journal of Cardiology - May 26, 2018 Category: Cardiology Source Type: research

Collateral Scoring on CT Angiogram Must Evaluate Phase and Regional Pattern.
CONCLUSION: Collateral assessments in acute ischemic stroke are best done using CTA with temporal resolution and by assessing regional variability. ACA-MCA and MCA-PCA collaterals should be evaluated separately. PMID: 28862107 [PubMed - in process]
Source: The Canadian Journal of Neurological Sciences - September 1, 2017 Category: Neurology Authors: Casault C, Al Sultan AS, Trivedi A, Sohn SI, Qazi E, Bokyo M, Almekhlafi M, d'Esterre C, Goyal M, Demchuk AM, Menon BK Tags: Can J Neurol Sci Source Type: research

Sex Differences in Sex Hormone Profiles and Prediction of Consciousness Recovery After Severe Traumatic Brain Injury
Conclusion: These findings indicate that TBI differentially affects the levels of sex-steroid hormones in men and women patients. Plasma levels of testosterone could be a good candidate blood marker to predict recovery from unconsciousness after sTBI for male patients. Introduction Traumatic brain injury (TBI) is a major cause of death and disability worldwide and is increasing in incidence (1). Patients with acute severe TBI (sTBI) often develop severe disorders of consciousness, i.e., coma, minimally conscious state or vegetative state. Although many patients may regain consciousness during the 1-month post-TBI p...
Source: Frontiers in Endocrinology - April 25, 2019 Category: Endocrinology Source Type: research

Effects of Riociguat on Right Ventricular Remodelling in Chronic Thromboembolic Pulmonary Hypertension Patients: A Prospective Study
ConclusionsRiociguat treatment was associated with increased RV stroke volume index and trends for improvement in myocardial remodelling in patients with CTEPH. A larger clinical study is warranted to observe the therapeutic benefits of riociguat on RV remodelling.RésuméContexteLes effets du traitement par le riociguat sur le métabolisme, la perfusion et le débit du ventricule droit (VD) chez les patients atteints d’hypertension pulmonaire thromboembolique chronique (HPTC) sont inconnus. Dans la présente étude, nous analysons les changements aux ventriculaires droits associés au traitement par le riociguat.Méthod...
Source: Canadian Journal of Cardiology - August 29, 2018 Category: Cardiology Source Type: research

A multicenter trial of extracorporeal cardiac shock wave therapy for refractory angina pectoris: report of the highly advanced medical treatment in Japan
In this study, we further addressed the efficacy and safety of CSWT in a single-arm multicenter study approved as a highly advanced medical treatment by the Japanese Ministry of Health, Labour and Welfare. Fifty patients with refractory AP [mean age 70.9  ± 12.6 (SD) years, M/F 38/12] without the indications of percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) were enrolled in 4 institutes in Japan. Ischemic myocardial regions in the left ventricle (LV) were identified by drug-induced stress myocardial perfusion imaging (MPI). Shock waves (200 shots/spot at 0.09 mJ/mm2) were applied t...
Source: Heart and Vessels - June 25, 2018 Category: Cardiology Source Type: research

Effects of Riociguat on Right Ventricular Remodeling in Chronic Thromboembolic Pulmonary Hypertension Patients: A Prospective Study
Conclusions Riociguat treatment was associated with increased RVSVI and trends for improvement in myocardial remodeling in CTEPH patients. A larger clinical study is warranted to observe the therapeutic benefits of riociguat on RV remodeling. Teaser Riociguat is an approved medical treatment for chronic thromboembolic pulmonary hypertension (CTEPH) patients. We studied the effects of riociguat treatment on right ventricular (RV) remodeling by means of magnetic resonance imaging (MRI) and positron emission tomography (PET). After 6 months of riociguat treatment in 6 CTEPH patients, RV function increased, fibrosis decreased ...
Source: Canadian Journal of Cardiology - June 26, 2018 Category: Cardiology Source Type: research

New Insights into the Use of Cardiac Magnetic Resonance Imaging to Guide Decision-Making in AF Management
Publication date: Available online 12 July 2018Source: Canadian Journal of CardiologyAuthor(s): Tarek Zghaib, Saman NazarianAbstractRecent advances in cardiac magnetic resonance (CMR) imaging acquisition techniques have enabled the visualization of thin atrial myocardium with high temporal and spatial resolution and have the potential to shift atrial fibrillation (AF) management paradigms. Late gadolinium-enhancement (LGE) CMR can non-invasively identify atrial arrhythmogenic scar substrates and has been shown to spatially correlate with low-voltage areas. Immediately post-ablation, a combination of native T1-weighted, LGE...
Source: Canadian Journal of Cardiology - July 12, 2018 Category: Cardiology Source Type: research