scholarly journals 098 A case of delayed post-hypoxic leukoencephalopathy complicating drug overdose

2019 ◽  
Vol 90 (e7) ◽  
pp. A32.1-A32
Author(s):  
Min Fong ◽  
Nicholas Rigby ◽  
Paul Pun ◽  
Roger Mitchell ◽  
Daniel Schweitzer ◽  
...  
Keyword(s):  
White Matter ◽  
Single Case ◽  
Neuropsychiatric Symptoms ◽  
Bipolar Affective Disorder ◽  
Cerebral White Matter ◽  
High Signal ◽  
White Matter Changes ◽  
Hypoxic Event ◽  
Diffusion Weighted Images ◽  
Single Case Report

IntroductionDelayed post-hypoxic leukoencephalopathy (DPHL) is a syndrome characterised by neurological deterioration following a period of recovery after an initial hypoxic event with striking white-matter change on magnetic resonance imaging. We present a case characterised by insidious onset and a fluctuating course of cognitive and neuropsychiatric symptoms.MethodsSingle case report.ResultsA 61 year old lady, with a background history of previously well managed bipolar affective disorder, was found unresponsive following an intentional overdose of temazepam and tramadol. She was hypotensive, hypoxic and required ventilatory and inotropic support. Following extubation, the patient had residual left-sided weakness and MRI confirmed a right frontal watershed infarction. A three week period of clinical improvement was followed by marked deterioration firstly with fluctuating mood and other neuropsychiatric symptoms which progressed to severe impairment of cognition and alertness. There was generalised slowing on the EEG and the CSF was unremarkable. Repeat neuroimaging undertaken on day 41 of the admission, revealed new symmetric and confluent cerebral white matter changes with high signal on the Diffusion Weighted Images (DWI) and Fluid Attenuated Inversion Recovery (FLAIR) images. The patient was managed with supportive care and sustained a clinically significant recovery (MOCA 26/30), despite ongoing cognitive impairments including working memory and deficits in social cognition including mood instability and disinhibition. Repeat neuroimaging 3 months after initial presentation revealed partial resolution of the white matter changes.ConclusionA diagnosis of DPHL should be considered in patients with variable mood and cognition following initial improvement after a hypoxic event.

Effect of the Interaction Between Hypertension and Cerebral White Matter Changes on the Progression of Alzheimer Disease

2018 ◽  
Vol 15 (14) ◽  
pp. 1354-1360 ◽  
Author(s):  
Ping-Song Chou ◽  
Yi-Hui Kao ◽  
Meng-Ni Wu ◽  
Mei-Chuan Chou ◽  
Chun-Hung Chen ◽  
...  
Keyword(s):  
White Matter ◽  
Alzheimer Disease ◽  
Rating Scale ◽  
Vital Role ◽  
Independent Effect ◽  
Cerebral White Matter ◽  
Clinical Dementia Rating ◽  
White Matter Changes ◽  
Age Related ◽  
The Mean

Background: Cerebrovascular pathologies and hypertension could play a vital role in Alzheimer disease (AD) progression. However, whether cerebrovascular pathologies and hypertension accelerate the AD progression through an independent or interaction effect is unknown. Objective: To investigate the effect of the interactions of cerebrovascular pathologies and hypertension on AD progression. Method: A retrospective longitudinal study was conducted to compare AD courses in patients with different severities of cerebral White Matter Changes (WMCs) in relation to hypertension. Annual comprehensive psychometrics were performed. WMCs were rated using a rating scale for Age-related WMCs (ARWMC). Results: In total, 278 patients with sporadic AD were enrolled in this study. The mean age of the patients was 76.6 ± 7.4 years, and 166 patients had hypertension. Among AD patients with hypertension, those with deterioration in clinical dementia rating-sum of box (CDR-SB) and CDR had significantly severe baseline ARWMC scales in total (CDR-SB: 5.8 vs. 3.6, adjusted P = 0.04; CDR: 6.4 vs. 4.4, adjusted P = 0.04) and frontal area (CDR-SB: 2.4 vs. 1.2, adjusted P = 0.01; CDR: 2.4 vs. 1.7, adjusted P < 0.01) compared with those with no deterioration in psychometrics after adjustment for confounders. By contrast, among AD patients without hypertension, no significant differences in ARWMC scales were observed between patients with and without deterioration. Conclusion: The effect of cerebrovascular pathologies on AD progression between those with and without hypertension might differ. An interaction but not independent effect of hypertension and WMCs on the progression of AD is possible.

Diffusion Tensor Imaging and Fiber Tractography

2009 ◽  
pp. 229-246
Author(s):  
Evanthia E. Tripoliti ◽  
Dimitrios I. Fotiadis ◽  
Konstantia Veliou
Keyword(s):  
Diffusion Tensor Imaging ◽  
White Matter ◽  
Diffusion Tensor ◽  
Brain Regions ◽  
Cerebral White Matter ◽  
Tissue Microstructure ◽  
Diffusion Weighted Images ◽  
Fiber Tracts ◽  
Diffusion Weighted ◽  
Magnetic Resonance Imaging Mri

Diffusion Tensor Imaging (DTI) is a magnetic resonance imaging (MRI) modality which can significantly improve our understanding of the brain structures and neural connectivity. DTI measures are thought to be representative of brain tissue microstructure and are particularly useful for examining organized brain regions, such as white matter tract areas. DTI measures the water diffusion tensor using diffusion weighted pulse sequences which are sensitive to microscopic random water motion. The resulting diffusion weighted images (DWI) display and allow quantification of how water diffuses along axes or diffusion encoding directions. This can help to measure and quantify the tissue’s orientation and structure, making it an ideal tool for examining cerebral white matter and neural fiber tracts. In this chapter the authors discuss the theoretical aspects of DTI, the information that can be extracted from DTI data, and the use of the extracted information for the reconstruction of fiber tracts and the diagnosis of a disease. In addition, a review of known fiber tracking algorithms is presented.

scholarly journals A SINGLE CASE REPORT ON HYPERAMMONEMIA INDUCED BY VALPROATE MONOTHERAPY WITHOUT HEPATIC DYSFUNCTION

2017 ◽  
Vol 9 (4) ◽  
pp. 218 ◽  
Author(s):  
C. Prarthana Saraswathi ◽  
J. Anu Rita ◽  
S. Nambi
Keyword(s):  
Case Report ◽  
Mental Status ◽  
Hepatic Dysfunction ◽  
Single Case ◽  
Bipolar Affective Disorder ◽  
Mood Stabilizer ◽  
Altered Mental Status ◽  
Plasma Ammonia ◽  
Manic Symptoms ◽  
Single Case Report

Valproate is a commonly used mood stabilizer. One of the important and rare side effects of valproate is hyperammonemia leading to delirium and hepatic encephalopathy. Valproate-induced delirium is commonly mistaken for worsening of manic symptoms or psychosis. We hereby report a case of bipolar affective disorder who was on a therapeutic dose of valproate monotherapy developed altered mental status where we found elevated levels of plasma ammonia which decreased after the discontinuation of valproate and with normal levels of serum valproate, LFT’s, EEG and imagings. This case report emphasises on the need to consider plasma ammonia levels in patients with altered mental status receiving valproate in addition to other investigations.

Cerebral white matter changes are associated with abnormalities on neurological examination in non-disabled elderly: the LADIS study

2012 ◽  
Vol 260 (4) ◽  
pp. 1014-1021 ◽  
Author(s):  
Anna Poggesi ◽  
Alida Gouw ◽  
Wiesje van der Flier ◽  
Giovanni Pracucci ◽  
Hugues Chabriat ◽  
...  
Keyword(s):  
White Matter ◽  
Neurological Examination ◽  
Cerebral White Matter ◽  
White Matter Changes ◽  
Disabled Elderly
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