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Search for the word below: MRS
Number of hits: 13
JULY 30, 2019
Introduction - The aim of this study is to evaluate utility of CHADS2 score to estimate stroke severity and prognosis in patients with ischemic stroke due to non-valvular atrial fibrillation (AF) in addition to evaluate effects of hematologic and echocardiographic findings on stroke severity and prognosis. Methods - This prospective study included 156 ischemic stroke cases due to non-valvular AF in neurology ward of Trakya University Medical School between March 2013-March 2015. National Institute of Health Stroke (NIHS) score was used to evaluate severity of stroke at admission. Carotid and vertebral Doppler ultrasonography findings, brain computed tomography (CT) and magnetic resonance imaging (MRI) of the cases were evaluated. Left atrial diameter and ejection fraction (EF) values were measured. CHADS2 score was calculated. Modified Rankin Scale was used to rate the degree of dependence. Effects of age and sex of the patients, presence of diabetes mellitus (DM), Congestive Heart Failure (CHF), Cerebrovascular Disease (CVD) and C-reactive protein (CRP) levels on CHADS2, NIHS, and mRS were evaluated. Results - In patients with age ≥75, mean NIHS score was 3.3 points and mean mRS score was 1.02 points higher, than in patient below 75 years of age. Compared with the mild risk group, cases in the high risk group had older age, higher serum D-dimer, fibrinogen and CRP levels and lower EF. A positive relation was detected between stroke severity and Hemorrhagic Transformation (HT), previous CVD history, and presence of CHF. A significant association was found between increased stroke severity and Early Neurological Deterioration (END) development. Older age, higher serum fibrinogen, D-dimer, CRP and lower EF values were associated with poor prognosis. History of CVD and presence of CHF were associated with poor prognosis. END development was found to be associated with poor prognosis. In the high-risk group, 30.3% (n = 33) had END. Among those in the high-risk group according to the CHADS2 score, END development rate was found to be significantly higher than in the moderate risk group (p <0.05). There was a strong positive correlation between CHADS2 and NIHS scores. mRS score increased with increasing CHADS2 score and there was a strong correlation between them. Effect of stroke severity on prognosis was assessed and a positive correlation was found between NIHS score and mRS value. Discussion - Our study demonstrated the importance of CHADS2 score, haemostatic activation and echocardiographic findings to assess stroke severity and prognosis. Knowing factors which affect stroke severity and prognosis in patients with ischemic stroke may be directive to decide primary prevention and stroke management.
JULY 30, 2018
[Online supplementay figure to the article titled Novel structured MRI reporting system in neonatal hypoxic-ischemic encephalopathy - issues of development and first use experiences]
JULY 30, 2018
Purpose - To develop an evidence-based, standardized structured reporting (SR) method for brain MRI examinations in neonatal hypoxic-ischemic encephalopathy (HIE) suitable both for clinical and research use. Materials and methods - SR template development was based on comprehensive review of the pertinent literature with the basic sections and subdivisions of the template defined according to MRI sequences (both conventional and diffusion-weighted, MR-spectroscopy (MRS), and T2*-weighted imaging), and the items targeted on age-related imaging patterns of HIE. In order to evaluate the usability of the proposed SR template we compared data obtained from the brain MR image analysis of 87 term and 19 preterm neonates with the literature. The enrolled 106 infants were born between 2013 and 2015, went through therapeutic hypothermia according to the TOBY criteria due to moderate to severe asphyxia and had at least one brain MRI examination within the first two weeks of life. Ethical approval was obtained for this retrospective study. Descriptive statistical analysis was also performed on data exported from the structured reporting system as feasibility test. Results - The mean gestational age of the study population was 38.3±2.2 weeks; brain MRI was performed on 5.8±2.9 day of life, hence in 78% of our patients after the conclusion of therapeutic hypothermia. Our main imaging findings were concordant to the pertinent literature. Moreover, we identified a characteristic temporal evolution of diffusion changes. Interestingly 18% (n=19/106) of the clinically asphyxiated infants had isolated axial-extraaxial haemorrhage without any imaging sign of HIE. Conclusion - In this article our approach of reporting HIE cases with our novel SR template is described. The SR template was found suitable for reporting HIE cases, moreover it uncovered time and location dependent evolution of diffusion abnormalities (and pseudonormalization, as well), suggesting its usefulness in clinical research applications. The high number of isolated intracranial haemorrhages, and the changing diffusion pattern emphasizes the importance of early imaging in HIE.
JANUARY 20, 2017
Objective - Patients were assessed in terms of risk factors, hematoma size and localization, the effects of spontaneous intracerebral hemorrhage (ICH) on mortality and morbidity, and post-stroke depression. Materials and methods - The present study evaluated the demographic data, risk factors, and neurological examinations of 216 ICH patients. The diagnosis, volume, localization, and ventricular extension of the hematomas were determined using computed tomography scans. The mortality rate through the first 30 days was evaluated using ICH score and ICH grading scale. The Modified Rankin Scale (mRS) was used to determine the dependency status and functional recovery of each patient, and the Hamilton Depression Rating Scale was administered to assess the psychosocial status of each patient. Results - The mean age of the patients was 65.3±14.5 years. The most common locations of the ICH lesions were as follows: lobar (28.3%), thalamus (26.4%), basal ganglia (24.0%), cerebellum (13.9%), and brainstem (7.4%). The average hematoma volume was 15.8±23.8 cm3; a ventricular extension of the hemorrhage developed in 34.4% of the patients, a midline shift in 28.7%, and perihematomal edema, as the most frequently occurring complication, in 27.8%. Over the 6-month follow-up period, 57.9% of patients showed a poor prognosis (mRS: ≥3), while 42.1% showed a good prognosis (mRS: <3). The mortality rate over the first 30 days was significantly higher in patients with a low Glasgow Coma Scale (GCS) score at admission, a large hematoma volume, and ventricular extension of the hemorrhage (p=0.0001). In the poor prognosis group, the presence of moderate depression (39.13%) was significantly higher than in the good prognosis group (p=0.0001). Conclusion - Determination and evaluation of the factors that could influence the prognosis and mortality of patients with ICH is crucial for the achievement of more effective patient management and improved quality of life.
JULY 30, 2015
[Aim of the study - In the present study, we report procedural and mid-term functional outcome data on the first 50 neurointerventional treatments of acute ischemic stroke in the Kaposi Mór County Hospital, Kaposvár, Hungary. Materials and methods - Endovascular recanalization of occluded large cervical and intracranial arteries was performed following an unsuccessful intravenous lysis or when intravenous lysis was contraindicated. A control cohort was retrospectively formed by analyzing data of 16 patients who has been unsuccesfully treated with iv. lysis before neurointervention was available in our hospital. Results and conclusion - Recanalization rate was 84% and major complication rate was 2% in the neurointerventional group. Mid-term good functional outcome, defined as mRS 0-2, was achieved in 44% in the neurointerventional and in 13% in the intravenous lysis group, after 11.5 and 39.7 months follow-up period, respectively. Subgroup analysis revealed patient age as the strongest predictive factor of good functional outcome. Our data shows that neurointerventional treatment of acute ischemic stroke gives substantially improved functional outcome, in accordance with the results of the recently published international randomized trials.]
Hypertension and nephrology
DECEMBER 20, 2014
[Author analyzes the most frequently used, reliable cardiovascular risk estimation methods. Only those methods are useful that meet to the american and european prevention guidelines and were edited by processing of the great databases. The best known risk estimation methods are continuously is expanding by growing body of knowledge and by another iseful risk factors, because the only way in order to successfully prevent the cardiovascular diseases. Two types of method-groups are known: 1. Traditional narrowed form for the general practisers and for the large section of population, 2. Methods with a broader analysis and more risk factors for the specialists and scientists. In Europe PROCAM and Heart Score and their variations are most useful for the practical medical work, but it is possible to use the american ASCVD and Reynolds risk estimation methods as well using the help of the national correction factors. The methods with wider analysis and much more risk factors as the Mayo Clinic mode, Qrisk2 and IHMRS are suitable in assisting of the epidemiologic studies or scientific work.]
JULY 30, 2013
[Background - There are still dilemmas about the vasodilating effect of vinpocetine, a synthetic ethyl alkaloid vincamine. The method of measuring cerebral vasomotor reactivity (VMR) by transcranial Doppler (TCD) technique before and after administration of the medication was used to estimate the degree of arterioles vasodilatation. The aim of this study was to test of the vasodilating effect of vinpocetine in patients with cerebral small vessel disease (SVD) by measuring cerebral VMR. Material and methods - Thirty patients with SVD were on 3-month-long oral treatment with 15 mg vinpocetine daily. Cerebral VMR was determined by breath holding test. The breath holding index (BHI) was calculated in standard manner and values >0.69 were considered normal. At the baseline, before treatment (I), BHI, modified Rankin scale (mRS) score, Mini Mental State Examination (MMSE) score were determined. One month later (II) BHI was assessed again, while after 3 months of treatment (III) we analyzed BHI, mRS score and MMSE score. Results - The average age of patients was 61.4±11.5 years (range 40 to 77 years), 18 (60%) female and 12 (40%) males. Values of BHIs were increased during treatment at the right MCA (I) 1.18±0.53, (II) 1.26±0.54, (III) 1.37±0.41, with statistical significance between I and III measurement (p<0.05). An increase was noted on the left MCA (I) 1.25±0.53, (II) 1.31±0.55 and (III) 1.32±0.42, but it did not reach statistical significance (p>0.05). Mean MMSE score significantly increased from baseline 27.4±2.3 to 28.5±2.0 after three months of treatment (p<0.001). Functional status showed a statistically significant improvement with mRS score increasing from 2.1±1.0 to 1.1±0.6 (p<0.001). Conclusion - This pilot study showed that 3-month-long oral treatment with vinpocetine 15 mg daily had tendency to increase BHI, indicating improvement of cerebral VMR. It is possible that higher doses of vinpocetine are needed to achieve substantial increase of VMR.]
SEPTEMBER 30, 2012
[Objective - Application of a quantitative MR-spectroscopic method for 3T clinical scanners based on tissue water content as an internal reference. Patients and methods - Six (22±2 yrs) volunteers were involved in the study. We performed T1 relaxation time measurements in a particular slice of the brain at 1T and 3T. Based on the validated water content measurement at 1T, the correlation of relaxation time T1 and water content was determined at 3T. The resulting water content served as internal reference for the quantification of localizated MRspectroscopic measurement. Results - At 3T our method resulted in 37.6±0.5 mol/l and 46.4±1.5 mol/l tissue water content in the white and gray matter, respectively. Calibration based on water content led to following metabolite concentrations: N-acetyl-aspartate 7.79±0.67 mmol/l; creatine 3.76±0.28 mmol/l; choline 3.68±0.47 mmol/l; myo-inositol 10.35±3.70 mmol/l in the white matter; and N-acetyl-aspartate 8.20±0.45 mmol/l; creatine 4.76±0.18 mmol/l; choline 2.64±0.35 mmol/l; myo-inositol 8.32±1.42 mmol/l in the grey matter. Conclusions - Tissue water content based on T1 value at 3T shows good accordance with gravimetric or other MR methods in the literature. Using it as an internal reference resulted in white matter metabolite concentrations that are in the range of previously published data. Comparing metabolite values of grey matter is more difficult because data in the literature substantially differ. The presented method is simple and easily applicable on any MR scanner without complicated correction and calibration steps.]
SEPTEMBER 23, 2011
[Neuroradiology and magnetic resonance imaging (MRI) as its leading tool play a basic role in the diagnostics of epilepsy. The result of the MRI examination is of utmost importance in patients with therapy resistent focal epilepsy possibly requiring neurosurgical intervention. Based on the continuously developing MRI techniques, we can use an optimal imaging protocol. Cerebral structures can be evaluated on a microanatomical level on high-resolution images with thin slices. The three-dimensional (3D) sequence has high spatial resolution, properly distinguishes cerebral grey and white matter, provides the possibility of surface rendering and volumetry, as well as an anatomical basis for other methods like tractography, functional MRI and neuronavigation. Diffusion weighted and diffusion tensor imaging (DWI, DTI) and tractography has an important role in differential diagnostics and tractography visualizes the main white matter tracts and their relation with brain pathologies. MR perfusion (MRP) provides help in differential diagnostics and may have a future role in the determination of the epileptogenic focus in multifocal pathologies. MR spectroscopy (MRS) is important in differential diagnostics, lateralization of focal epilepsy and in the confirmation of hippocampal sclerosis. Several of these methods need special hardware, software and expertise, but the basic MRI protocol for epilepsy can be implemented in all modern MR scanners of middle or high field strength.]
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