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Dive into the research topics where Penelope Smyth is active.

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Featured researches published by Penelope Smyth.


Obstetrics & Gynecology | 2014

Management of multiple sclerosis during pregnancy and the reproductive years: a systematic review.

Riley Bove; Sura Alwan; Jan M. Friedman; Kerstin Hellwig; Maria K. Houtchens; Gideon Koren; Ellen Lu; Thomas F. McElrath; Penelope Smyth; Helen Tremlett; A. D. Sadovnick

OBJECTIVE: To examine the evidence guiding management of multiple sclerosis (MS) in reproductive-aged women. DATA SOURCES: We conducted an electronic literature search using PubMed, ClinicalTrials.gov, and other available resources. The following keywords were used: “multiple sclerosis” and “pregnancy.” We manually searched the reference lists of identified studies. METHODS OF STUDY SELECTION: Two reviewers categorized all studies identified in the search by management topic, including effect of pregnancy on MS course, fetal risks associated with disease-modifying treatments during pregnancy, and management of patients off disease-modifying treatment. We categorized studies by strength of evidence and included prior meta-analyses and systematic studies. These studies were then summarized and discussed by an expert multidisciplinary team. TABULATION, INTEGRATION, AND RESULTS: The risk of MS relapses is decreased during pregnancy and increased postpartum. Data are lacking regarding the risks of disease-modifying treatments during pregnancy. There may be an increased risk of MS relapses after use of assisted reproductive techniques. There does not appear to be a major increase in adverse outcomes in newborns of mothers with MS. CONCLUSION: Although there are many unmet research needs, the reviewed data support the conclusion that in the majority of cases, women with MS can safely choose to become pregnant, give birth, and breastfeed children. Clinical management should be individualized to optimize both the mothers reproductive outcomes and MS course.


BMJ Open | 2014

The Canadian survey of health, lifestyle and ageing with multiple sclerosis: methodology and initial results

Michelle Ploughman; Serge Beaulieu; Chelsea Harris; Stephen Hogan; Olivia J Manning; Penelope W Alderdice; John D. Fisk; A. Dessa Sadovnick; Paul O'Connor; Sarah A. Morrow; Luanne M. Metz; Penelope Smyth; Nancy E. Mayo; Ruth Ann Marrie; Katherine Knox; Mark Stefanelli; Marshall Godwin

Objective People with multiple sclerosis (MS) are living longer so strategies to enhance long-term health are garnering more interest. We aimed to create a profile of ageing with MS in Canada by recruiting 1250 (5% of the Canadian population above 55 years with MS) participants and focusing data collection on health and lifestyle factors, disability, participation and quality of life to determine factors associated with healthy ageing. Design National multicentre postal survey. Setting Recruitment from Canadian MS clinics, MS Society of Canada chapters and newspaper advertisements. Participants People aged 55 years or older with MS symptoms more than 20 years. Outcome measures Validated outcome measures and custom-designed questions examining MS disease characteristics, living situation, disability, comorbid conditions, fatigue, health behaviours, mental health, social support, impact of MS and others. Results Of the 921 surveys, 743 were returned (80.7% response rate). Participants (mean age 64.6±6.2 years) reported living with MS symptoms for an average of 32.9±9.5 years and 28.6% were either wheelchair users or bedridden. There was only 5.4% missing data and 709 respondents provided optional qualitative information. According to data derived from the 2012 Canadian Community Health Survey of Canadians above 55 years of age, older people with MS from this survey sample are about eight times less likely to be employed full-time. Older people with MS were less likely to engage in regular physical activity (26.7%) compared with typical older Canadians (45.2%). However, they were more likely to abstain from alcohol and smoking. Conclusions Despite barriers to participation, we were able to recruit and gather detailed responses (with good data quality) from a large proportion of older Canadians with MS. The data suggest that this sample of older people with MS is less likely to be employed, are less active and more disabled than other older Canadians.


Journal of Neurology | 2016

Multiple sclerosis in men: management considerations

Riley Bove; Allison McHenry; Kerstin Hellwig; Maria K. Houtchens; Neda Razaz; Penelope Smyth; Helen Tremlett; A. D. Sadovnick; D. Rintell

Multiple sclerosis (MS) is a lifelong disease typically affecting individuals in young to middle adulthood. There are recognized sex differences in MS onset and clinical course. MS affects approximately three times more women than men, thus resulting in less attention to the male experience (i.e. diagnosis, management, societal dimensions). Here, we review current scientific evidence on sex differences in MS risk and course, highlight potential sources of bias, and suggest avenues of further inquiry. We then describe what is known about male experiences with MS diagnosis, treatment, and symptom management (particularly mood and sexual function). Finally, we consider ways in which healthcare providers might engage male patients in the broader aspects of living with MS (e.g. familial and societal relationships) to influence their long-term quality of life (QOL). When possible, we draw from published sources to underscore our collective clinical and scientific experiences.


Journal of Child Neurology | 2003

Multifocal myoclonus following group A streptococcal infection.

Penelope Smyth; D. Barry Sinclair

Movement disorders as postinfectious manifestation of group A streptococcal infections have been reported and are thought to occur on an autoimmune basis. We describe an unusual case of multifocal myoclonus following strep throat infection. Clinical description and chart review were the method used. A 10-year-old boy developed focal myoclonus involving his right arm and shoulder 1 week after streptococcal throat infection treated with penicillin. His magnetic resonance image was normal, and he initially responded to clonazepam but did not sustain a response. The myoclonus spread to involve all limbs and the trunk, becoming multifocal over the next few weeks. He did not have choreoathetosis of Syndenhams chorea. He was given one course of intravenous immunoglobulin and became asymptomatic after treatment. He remained symptom free for 8 months following intravenous immunoglobulin treatment. Various symptoms have been reported following group A streptococcal infections in children. These neurobehavioral abnormalities may be mediated through antineuronal antibodies. Our case demonstrates multifocal myoclonus as a poststreptococcal autoimmune phenomenon. To our knowledge, only two other cases of poststreptococcal myoclonus have been reported in the literature. Recognition of this unusual condition as a manifestation of autoimmune poststreptococcal disease in children is essential to avoid overinvestigation and to ensure early treatment. (J Child Neurol 2003;18:434—436).


Journal of Stroke & Cerebrovascular Diseases | 2016

Microscopic Polyangiitis with Spinal Cord Involvement: A Case Report and Review of the Literature

Martha L. Decker; Derek Emery; Penelope Smyth; Jian-Qiang Lu; Atilano Lacson; Elaine Yacyshyn

BACKGROUND Microscopic polyangiitis (MPA) is an ANCA-associated vasculitis (AAV; ANCA denotes antineutrophil cytoplasmic antibody) that causes necrotizing inflammation of small blood vessels. Renal and pulmonary manifestations are common whereas central nervous system (CNS) involvement, and in particular spinal disease, is rare. METHODS We reviewed a case of MPA presenting with spinal intradural hemorrhage and intracerebral hemorrhage. We also summarized all reported cases of AAV with spinal cord involvement in the literature (database search included MEDLINE, Embase, Scopus, and Proquest with no date or language restriction). RESULTS We reviewed 20 cases of AAV with spinal cord involvement (12 granulomatosis with polyangiitis [GPA], 4 eosinophilic granulomatosis with polyangiitis, 2 MPA, and 2 cases diagnosed as AAV only) and reported demographic information, clinical features, methods of diagnosis, treatment, and patient outcome. Although CNS involvement has been associated with a poor prognosis, 14 of 18 cases that reported outcome data achieved remission during follow-up. Death occurred in 3 patients diagnosed with GPA and in 1 patient with MPA. Our patient with MPA deteriorated rapidly despite use of prednisone and died. CONCLUSIONS AAV can present with brain and spinal cord involvement, even in the absence of systemic disease. CNS disease may be responsive to immunosuppressive therapy (e.g., steroids and cyclophosphamide) in several of the cases reviewed.


Qualitative Health Research | 2018

The Experience of Persons With Multiple Sclerosis Using MS INFoRm: An Interactive Fatigue Management Resource

Julie Petrin; Nadine Akbar; Karen V. L. Turpin; Penelope Smyth; Marcia Finlayson

We aimed to understand participants’ experiences with a self-guided fatigue management resource, Multiple Sclerosis: An Interactive Fatigue Management Resource (MS INFoRm), and the extent to which they found its contents relevant and useful to their daily lives. We recruited 35 persons with MS experiencing mild to moderate fatigue, provided them with MS INFoRm, and then conducted semistructured interviews 3 weeks and 3 months after they received the resource. Interpretive description guided the analysis process. Findings indicate that participants’ experience of using MS INFoRm could be understood as a process of change, influenced by their initial reactions to the resource. They reported experiencing a shift in knowledge, expectations, and behaviors with respect to fatigue self-management. These shifts led to multiple positive outcomes, including increased levels of self-confidence and improved quality of life. These findings suggest that MS INFoRm may have a place in the continuum of fatigue management interventions for people with MS.


Journal of stroke | 2018

Penumbral Imaging-Based Thrombolysis with Tenecteplase Is Feasible up to 24 Hours after Symptom Onset

Mahesh Kate; Robert Wannamaker; Harsha Kamble; Parnian Riaz; Laura Gioia; Brian Buck; Thomas Jeerakathil; Penelope Smyth; Ashfaq Shuaib; Kenneth Butcher; Derek Emery

BACKGROUND AND PURPOSE Thrombolysis >4.5 hours after ischemic stroke onset is unproven. We assessed the feasibility of tenecteplase (TNK) treatment in patients with evidence of an ischemic penumbra 4.5 to 24 hours after onset. METHODS Acute ischemic stroke patients underwent perfusion computed tomography (CT)/magnetic resonance imaging. Patients with cerebral blood volume (CBV) or diffusion weighted imaging Alberta Stroke Program Early CT Scores (ASPECTS) >6 and mismatch score >2 (defined as >2 ASPECTS regions with delay on mean transit time maps and normal CBV) were eligible for treatment with TNK (0.25 mg/kg). Patients with mismatch patterns enrolled in non-endovascular/non-thrombolysis trials and those without mismatch patterns served as comparators. RESULTS The median (interquartile range) baseline National Institutes of Health Stroke Scale (NIHSS) in TNK treated patients (n=16) was 12 (range, 8 to 15). In the untreated mismatch (n=18) and nonmismatch (n=23) groups, the baseline NIHSS was 12 (range, 7 to 12) and 16 (range, 8 to 20; P=0.09) respectively. There was one symptomatic hemorrhage each in the TNK group (parenchymal hematoma [PH] 2) and non-mismatch group (PH 2). Penumbral salvage volumes were higher in TNK treated patients (48.3 mL [range, 24.9 to 80.4]) than the non-mismatch (-90.8 mL [range, -197 to -20]; P<0.0001) patients. CONCLUSIONS This prospective, non-randomized study supports the feasibility of TNK therapy in patients with evidence of ischemic penumbra 4 to 24 hours after onset.


Occupational and Environmental Medicine | 2017

Physicians' attentional performance following a 24-hour observation period: do we need to regulate sleep prior to work?

Penelope Smyth; Katerina Maximova; Jeffrey Jirsch


BMC Health Services Research | 2015

Predictors of chronic cerebrospinal venous insufficiency procedure use among older people with multiple sclerosis: a national case–control study

Michelle Ploughman; Olivia J Manning; Serge Beaulieu; Chelsea Harris; Stephen Hogan; Nancy E. Mayo; John D. Fisk; A. Dessa Sadovnick; Paul O’Connor; Sarah A. Morrow; Luanne M. Metz; Penelope Smyth; Penelope W Allderdice; Susan C. Scott; Ruth Ann Marrie; Mark Stefanelli; Marshall Godwin


Archive | 2014

Management of Multiple Sclerosis During Pregnancy and the Reproductive Years

Riley Bove; Sura Alwan; Jan M. Friedman; Kerstin Hellwig; Maria K. Houtchens; Gideon Koren; Ellen Lu; Thomas F. McElrath; Penelope Smyth; Helen Tremlett; A. Dessa Sadovnick

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A. Dessa Sadovnick

University of British Columbia

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Helen Tremlett

University of British Columbia

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Maria K. Houtchens

Brigham and Women's Hospital

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Riley Bove

University of California

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A. D. Sadovnick

University of British Columbia

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