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Coquitlam, Canada

Harper D.G.,Geriatric Psychiatry Program | Harper D.G.,Harvard University | Plante D.T.,University of Wisconsin - Madison | Jensen J.E.,Brain Imaging Center | And 10 more authors.
Sleep | Year: 2013

Study Objectives: Primary insomnia (PI) is a sleep disorder characterized by difficulty with sleep initiation, maintenance, and/or the experience of nonrestorative sleep combined with a subsequent impairment of daytime functioning. The hyperarousal hypothesis has emerged as the leading candidate to explain insomnia symptoms in the absence of specific mental, physical, or substance-related causes. We hypothesized that the cellular energetic metabolites, including beta nucleoside triphosphate, which in magnetic resonance spectroscopy approximates adenosine triphosphate (ATP), and phosphocreatine (PCr), would show changes in PI reflecting increased energy demand. Design and Setting: Matched-groups, cross-sectional study performed at two university-based hospitals. Patients: Sixteen medication-free individuals (eight males, eight females; mean ± standard deviation (SD) age = 37.2 ± 8.4 y) with PI and 16 good sleepers (nine males, seven females; mean ± SD age = 37.6 ± 4.7 y). Measurements: Diagnosis was established for all individuals by unstructured clinical interview, Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (SCID), sleep diary, and actigraphy. Polysomnography was collected in individuals with PI. Phosphorous magnetic resonance spectroscopy (31P MRS) data were collected on all individuals at 4 Tesla. We assessed cell membrane (anabolic precursors and catabolic metabolites) and bioenergetic (ATP, phosphocreatine) metabolites in gray matter and white matter to determine their relationship to the presence and severity of PI. Results: Individuals with PI showed lower phosphocreatine in gray matter and an unexpected decrease of phosphocholine, a precursor of the cell membrane compound phosphatidylcholine, in white matter. In addition, there was a trend toward a negative association between polysomnographically determined wake after sleep onset and gray matter beta-nucleoside triphosphate and white matter phosphocholine in the primary insomnia group. Conclusions: These results support the hyperarousal hypothesis in PI based on lower phosphocreatine in gray matter in the PI group.

Rai S.,Geriatric Psychiatry Program | Kivisalu T.,Geriatric Psychiatry Program | Rabheru K.,Geriatric Psychiatry Program | Rabheru K.,University of British Columbia | And 3 more authors.
Journal of ECT | Year: 2010

Across health care disciplines research reflects the usefulness of integrating computer technology into administrative and clinical practices. Electroconvulsive therapy (ECT) researchers are often interested in examining 3 primary areas: patient characteristics, treatment characteristics, and treatment outcomes. Generating reports and conducting research analysis via the traditional patient chart review are a time-consuming and costly method. At Riverview Hospital, a tertiary care psychiatric hospital, the active use of a clinical database for patients receiving ECT allows for detailed treatment tracking and evaluation of pretreatment and posttreatment patient outcome measures. Initially, designed as part of a quality improvement process to readily access patient information and generate periodic reports, the ECT clinical database is now a central resource for ECT-specific patient, treatment, and outcome tracking. The relevance, design, content variables, and subsequent functions of the entry and storage of ECT-related administrative, treatment, outcome, and patient factors are clearly outlined and discussed. Strengths and limitations to the existing database are shared. Recommendations to other ECT services to implement this valuable documentation strategy are addressed. This approach can be an invaluable tool in providing the field of psychiatry with further contributions to ECT clinical outcomes. Copyright © 2010 by Lippincott Williams & Wilkins.

Harper D.G.,Geriatric Psychiatry Program | Harper D.G.,Harvard University | Jensen J.E.,Neuroimaging Center | Jensen J.E.,Harvard University | And 12 more authors.
American Journal of Geriatric Psychiatry | Year: 2014

Objective: Late-life depression has been hypothesized to have a neurodegenerative component that leads to impaired executive function and increases in subcortical white matter hyperintensities. Phosphorus magnetic resonance spectroscopy (MRS) can quantify several important phosphorus metabolites in the brain, particularly the anabolic precursors and catabolic metabolites of the constituents of cell membranes, which could be altered by neurodegenerative activity. Methods: Ten patients with late-life major depression who were medication free at time of study and 11 aged normal comparison subjects were studied using 31P MRS three-dimensional chemical shift imaging at 4 Tesla. Phosphatidylcholine and phosphatidylethanolamine comprise 90% of cell membranes in brain but cannot be quantified precisely with 31P MRS. We measured phosphocholine and phosphoethanolamine, which are anabolic precursors, as well as glycerophosphocholine and glycerophosphoethanolamine, which are catabolic metabolites of phosphatidylcholine and phosphatidylethanolamine. Results: In accordance with our hypotheses, glycerophosphoethanolamine was elevated in white matter of depressed subjects, suggesting enhanced breakdown of cell membranes in these subjects. Glycerophosphocholine did not show any significant difference between comparison and depressed subjects but both showed an enhancement in white matter compared with gray matter. Contrary to our hypotheses, neither phosphocholine nor phosphoethanolamine showed evidence for reduction in late-life depression. Conclusion: These findings support the hypothesis that neurodegenerative processes occur in white matter in patients with late-life depression more than in the normal elderly population. © 2014 American Association for Geriatric Psychiatry.

Malyuk R.E.,Geriatric Psychiatry Program | Wong C.,Simon Fraser University | Buree B.,Geriatric Psychiatry Program | Kang A.,Geriatric Psychiatry Program | Kang N.,Geriatric Psychiatry Program
Archives of Gerontology and Geriatrics | Year: 2012

The purpose of this study was to determine the impact of identifying and treating infections on functional outcomes and length of stay (LOS). Our retrospective naturalistic study reviewed all new admissions to a tertiary geriatric psychiatry teaching hospital from 2003 to 2007. Over this four-year period, 390 patients were admitted and discharged with 21% (85) of patients identified as having infections on admission. Those with infections were compared to the group without to determine and compare clinical characteristics. Factors included in analysis were: age, gender, diagnoses, medical comorbidity, neuropsychiatric symptoms, functional outcomes, medications and LOS. Both groups were similar in gender, psychiatric diagnoses and severity of dementia. Those requiring antibiotics for treatment of infections on admission, were older (p= 0.003), had poorer baseline function (p= 0.005) and higher medical comorbidity (p< 0.001). At discharge, the group with infections showed greater functional improvement (p< 0.001), particularly in mobility (p= 0.005) and cognition (p= 0.046), and had a shorter LOS (p= 0.02). We conclude that a significant number of patients in tertiary geriatric services continue to have infections on admission. Early identification and treatment of infections can result in improved function and decreased LOS. © 2011 Elsevier Ireland Ltd.

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