Tissue-Negative Transient Ischemic Attack: Is There a Role for Perfusion MRI?

OBJECTIVE: Approximately 60% of patients with a clinical transient ischemic attack (TIA) do not have DWI evidence of cerebral ischemia. The purpose of this study was to assess the added diagnostic value of perfusion MRI in the evaluation of patients with TIA who have normal DWI findings. MATERIALS AND METHODS: The inclusion criteria for this retrospective study were clinical presentation of TIA at admission with a discharge diagnosis of TIA confirmed by a stroke neurologist, MRI including both DWI and perfusion-weighted imaging within 48 hours of symptom onset, and no DWI lesion. Cerebral blood flow (CBF) and time to maximum of the residue function (Tmax) maps were evaluated independently by two observers. Multivariate analysis was used to assess perfusion findings; clinical variables; age, blood pressure, clinical symptoms, diabetes (ABCD2) score; duration of TIA; and time between MRI and onset and resolution of symptoms. RESULTS: Fifty-two patients (33 women, 19 men; age range, 20-95 years) met the inclusion criteria. A regional perfusion abnormality was identified on either Tmax or CBF maps of 12 of 52 (23%) patients. Seven (58%) of the patients with perfusion abnormalities had hypoperfused lesions best detected on Tmax maps; the other five had hyperperfusion best detected on CBF maps. In 11 of 12 (92%) patients with abnormal perfusion MRI findings, the regional perfusion deficit correlated with the initial neurologic deficits. Multivariable analysis revealed no significant difference in demographics, ABCD2 scores, or presentation characteristics between patients with and those without perfusion abnormalities. CONCLUSION: Perfusion MRI that includes Tmax and CBF parametric maps adds diagnostic value by depicting regions with delayed perfusion or postischemic hyperperfusion in approximately one-fourth of TIA patients who have normal DWI findings.

Felt and enacted stigma in elderly persons with epilepsy: A qualitative approach.

Stigma is a common psychological consequence of chronic diseases, including epilepsy; however, little research has been done to determine the effect of stigma on persons with epilepsy, especially the elderly. We interviewed 57 older adults with epilepsy to discover the extent and consequences of, and reasons for, epilepsy-related stigma in their lives. Felt stigma was more frequently reported than enacted stigma, with over 70% having experienced this form of stigma. Participants described ignorance and fear of the disease as the foundation of epilepsy-related stigma. The most common response to stigmatizing events was a decrease in epilepsy disclosure to family or friends. Results from this study could inform interventions designed for elderly persons with epilepsy and their support networks, as well as educational campaigns for the general public.

Identification of Barriers to Stroke Awareness and Risk Factor Management Unique to Hispanics.

Barriers to risk factor control may differ by race/ethnicity. The goal of this study was to identify barriers to stroke awareness and risk factor management unique to Hispanics as compared to non-Hispanic whites (NHWs). We performed a prospective study of stroke patients from an academic Stroke Center in Arizona and surveyed members of the general community. Questionnaires included: the Duke Social Support Index (DSSI), the Multidimensional Health Locus of Control (MHLC) Scale, a stroke barriers questionnaire, and a Stroke Awareness Test. Of 145 stroke patients surveyed (72 Hispanic; 73 NHW), Hispanics scored lower on the Stroke Awareness Test compared to NHWs (72.5% vs. 79.1%, p = 0.029). Hispanic stroke patients also reported greater barriers related to medical knowledge, medication adherence, and healthcare access (p < 0.05 for all). Hispanics scored higher on the "powerful others" sub-scale (11.3 vs. 10, p < 0.05) of the MHLC. Of 177 members of the general public surveyed, Hispanics had lower stroke awareness compared to NHWs and tended to have lower awareness than Hispanic stroke patients. These results suggest that Hispanic stroke patients perceive less control over their health, experience more healthcare barriers, and demonstrate lower rates of stroke literacy. Interventions for stroke prevention and education in Hispanics should address these racial/ethnic differences in stroke awareness and barriers to risk factor control.

Transitions of care for stroke and TIA.

PURPOSE: The purpose of this study was to identify elements of a stroke population that may affect transitions of care (TOC). DATA SOURCES: A retrospective analysis of the demographic characteristics of patients from an urban primary stroke center with an admitting diagnosis of transient ischemic attack, acute ischemic stroke, subarachnoid hemorrhage, or intracerebral hemorrhage was performed over an 8-month period (N = 276). A subset of this patient sample participated in a telephone survey 1 month after discharge. CONCLUSION: Hospital length of stay, age, insurance status, discharge disposition, comorbidities, and readmission rates were identified as important elements affecting TOC for stroke and TIA. Information from patient surveys indicated that emotional health, follow-up with care providers, stroke education, and point of contact are important elements during the transition periods after stroke and TIA. IMPLICATIONS FOR PRACTICE: Both providers and patients should inform the development of a comprehensive TOC program that spans in-hospital to multiple care settings, including the home, which is essential. The advanced practice nurse is ideally suited to successfully lead these programs.

Psychosocial Impact of Epilepsy in Older Adults.

OBJECTIVE: The purpose of our study was to describe the quality of life of older adults with seizures or epilepsy and compare its psychosocial impact between those who were new diagnosed and those diagnosed before the age of 65. METHODS: In-depth face to face interviews with open ended questions were conducted with two participant groups: Incident group: 42 older adults (>65 years) with new onset or newly diagnosed after age of 65; and Prevalent group: 15 older adults (>65 years) diagnosed before age of 65. Interviews were reviewed and coded using a list of themes and results were compared between the two groups. Eight topics were selected from the participants' responses to questions about the psychosocial impact of epilepsy and seizures. The topics were then analyzed and compared between the two groups. RESULTS: The topics analyzed were: Emotional and physical impact, significant life changes, co-morbidities, information gathering, stigma, AED side effects, changes in relationships and attitude toward diagnosis. CONCLUSION: We concluded that the age at onset and duration does seem to have a negative correlation with health related quality of life. However, the perceived health status of older adults with chronic epilepsy was significantly better and reflected in their more positive approach to the diagnosis of seizures or epilepsy probably because they have had a longer opportunity to learn to cope with their diagnosis.

Six-minute magnetic resonance imaging protocol for evaluation of acute ischemic stroke: pushing the boundaries.

BACKGROUND AND PURPOSE: If magnetic resonance imaging (MRI) is to compete with computed tomography for evaluation of patients with acute ischemic stroke, there is a need for further improvements in acquisition speed. METHODS: Inclusion criteria for this prospective, single institutional study were symptoms of acute ischemic stroke within 24 hours onset, National Institutes of Health Stroke Scale ≥3, and absence of MRI contraindications. A combination of echo-planar imaging (EPI) and a parallel acquisition technique were used on a 3T magnetic resonance (MR) scanner to accelerate the acquisition time. Image analysis was performed independently by 2 neuroradiologists. RESULTS: A total of 62 patients met inclusion criteria. A repeat MRI scan was performed in 22 patients resulting in a total of 84 MRIs available for analysis. Diagnostic image quality was achieved in 100% of diffusion-weighted imaging, 100% EPI-fluid attenuation inversion recovery imaging, 98% EPI-gradient recalled echo, 90% neck MR angiography and 96% of brain MR angiography, and 94% of dynamic susceptibility contrast perfusion scans with interobserver agreements (k) ranging from 0.64 to 0.84. Fifty-nine patients (95%) had acute infarction. There was good interobserver agreement for EPI-fluid attenuation inversion recovery imaging findings (k=0.78; 95% confidence interval, 0.66-0.87) and for detection of mismatch classification using dynamic susceptibility contrast-Tmax (k=0.92; 95% confidence interval, 0.87-0.94). Thirteen acute intracranial hemorrhages were detected on EPI-gradient recalled echo by both observers. A total of 68 and 72 segmental arterial stenoses were detected on contrast-enhanced MR angiography of the neck and brain with k=0.93, 95% confidence interval, 0.84 to 0.96 and 0.87, 95% confidence interval, 0.80 to 0.90, respectively. CONCLUSIONS: A 6-minute multimodal MR protocol with good diagnostic quality is feasible for the evaluation of patients with acute ischemic stroke and can result in significant reduction in scan time rivaling that of the multimodal computed tomographic protocol.

Formularies, costs, and quality of care: Formulary restrictions are not the answer, especially for epilepsy.

The goal of treating an individual with epilepsy is to have no seizures and no side effects. Limiting availability of medications appears to be a simple way of controlling costs of patient care. This approach potentially jeopardizes both efficacy and safety. We argue, in this edition of Current Controversies, that limiting costs by restricting formularies is detrimental to the patients from an efficacy, safety, and cost perspective.

Social and family characteristics of Hispanics with epilepsy.

The purpose of this study is to determine how acculturation, social support, family emotional involvement, perceived family criticism and stigma are associated with epilepsy self-efficacy and depression. A principal components analysis (PCA) was used to describe the salience of these characteristics within a sample of Hispanics with epilepsy. A total of 50 Hispanic adults of Mexican descent identified in our Epilepsy Clinic participated in this study. The PCA identified four distinct types, two were relatively culture-free, and two were distinctly culturally oriented. The first non-culture affiliated type described a well-adjusted group of individuals that tended to be males with moderate self-efficacy, who received social support, and who were unlikely to have depression or feel stigmatized. The second non-culture affiliated type described a dimension in which family emotional involvement tended to co-occur with perceived criticism. The Anglo-oriented group had a family environment that did not appear to criticize the individual with epilepsy and had good self-efficacy. The Mexican-oriented group had high self-efficacy and was unlikely to have depression. Results suggest that acculturation variables must be taken into consideration among ethnic groups because social, psychological and acculturation variables interact in complex ways. Additionally, it is clear that a diagnosis of epilepsy does not automatically lead to poor quality of life, stigma, or depression.

Emergency department care of seizure patients: demographic trends in southern Arizona.

The aim of this study was to describe the epidemiology of epilepsy and characteristics of patients with seizures who presented at the Yuma Regional Medical Center Emergency Department (YRMC ED) from 2005 to 2008. A seizure diagnosis was present in 2.7% of the patients, and accounted for 1.7% of all ED visits. Visits by patients identified as having epilepsy accounted for 0.3% of all ED visits. Patients with seizures were 2.8 times more likely to have used the ED for 2 or more years of the study period compared with control patients. Patients with at least one ED visit because of seizures were more likely to have multiyear visits, 43.6% visiting the ED within 2 or more years. Patients with epilepsy and seizures were significantly younger than the no-seizure control group. Patients who had ever been admitted to the ED for seizures or epilepsy had higher ED utilization even if the subsequent admissions were not seizure related.

Coccidioidal meningitis and brain abscesses: analysis of 71 cases at a referral center.

OBJECTIVE: Coccidioides species are the most common etiologic agents of chronic meningitis in regions endemic for coccidioidomycosis. Occasionally, even short-term travel to endemic regions results in the acquisition of meningeal disease, so awareness of this complication of coccidioidomycosis is important even in nonendemic areas. The prognosis depends on the early recognition and treatment of the disease, so it is important to be familiar with the varied clinical manifestations, risk factors associated with meningeal involvement, diagnostic challenges, and therapeutic modalities. METHODS: We performed a retrospective analysis of 71 cases with coccidioidomycosis involving the CNS seen from 1996 to 2007 at a referral medical center in southern Arizona. RESULTS: The only presenting symptom found in the majority of patients was headache. Those who were immunocompromised (most commonly HIV/AIDS and chronic steroid therapy) were at increased risk, but diabetics were not at increased risk. There was a preponderance of males (2:1) and people of Hispanic, African, and Asian (especially Pacific Isles) background. CSF anticoccidioidal antibody and culture were frequently negative on presentation, but in these cases, the serum antibody test was usually positive. Imaging studies were helpful in two thirds of cases, most commonly demonstrating basilar meningitis or hydrocephalus, which frequently required ventriculoperitoneal shunting. Most were treated with fluconazole, and prognosis was good for most of those who remained on treatment. CONCLUSIONS: Coccidioidal meningitis remains a diagnostic challenge, but the diagnosis can usually be made successfully when coccidioidal serum and CSF antibodies and cultures are combined with appropriate imaging studies.