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  1. Article: Transient Global Amnesia Recurrence: Prevalence and Risk Factor Meta-analysis.

    Hernández, Micaela Anahí / Arena, Julieta E / Alessandro, Lucas / Allegri, Ricardo Francisco / Calandri, Ismael L

    Neurology. Clinical practice

    2022  Volume 12, Issue 4, Page(s) e35–e48

    Abstract: Background and objectives: Transient global amnesia (TGA) is an acute amnestic disorder with unclear pathophysiology. Although considered a benign phenomenon, the possibility of a recurrence is a major concern for the patient. Our objective is to ... ...

    Abstract Background and objectives: Transient global amnesia (TGA) is an acute amnestic disorder with unclear pathophysiology. Although considered a benign phenomenon, the possibility of a recurrence is a major concern for the patient. Our objective is to identify the prevalence and risk factors of relapse to help clinicians counsel patients about it.
    Methods: According to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidance, we screened 1,658 studies from MEDLINE, Lilacs, and Embase databases, published from 1985 to April 2021, in English or Spanish. We included 36 observational case-control and cohort studies that included patients with TGA according to the Caplan or Hodges and Warlow diagnostic criteria. We performed a meta-analysis with a random effect model for proportions and calculation of odds ratio (OR) for identified risk factors. Methodological quality was assessed according to the Newcastle-Ottawa scale.
    Results: We identified 4,514 TGA cases and 544 recurrence events (12.73%). A follow-up had no effect on its variance. We identified a statistically significant association between recurrence and sexual activity as a trigger, a personal history or current state of migraine and depression (OR 1,481 95% CI [1.0341-2.1222]
    Discussion: The analysis showed that approximately 1 of 8 participants may experience recurrence, with an increased risk in the case of a history or current state of migraine, depression, or sexual intercourse before the event. A personal history of migraine and depression was associated with 2 and 4 times risk, respectively.
    Language English
    Publishing date 2022-04-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2645818-4
    ISSN 2163-0933 ; 2163-0402
    ISSN (online) 2163-0933
    ISSN 2163-0402
    DOI 10.1212/CPJ.0000000000001181
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Changes in the Care of Neurological Diseases During the First Wave of the COVID-19 Pandemic: A Single Private Center Study in Argentina.

    Calandri, Ismael L / Hawkes, Maximiliano A / Marrodan, Mariano / Ameriso, Sebastián F / Correale, Jorge / Allegri, Ricardo F

    Frontiers in neurology

    2021  Volume 12, Page(s) 613838

    Abstract: Introduction: ...

    Abstract Introduction:
    Language English
    Publishing date 2021-09-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2564214-5
    ISSN 1664-2295
    ISSN 1664-2295
    DOI 10.3389/fneur.2021.613838
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Perception of stroke symptoms and utilization of emergency medical services.

    Hawkes, Maximiliano A / Farez, Mauricio F / Calandri, Ismael L / Ameriso, Sebastián F

    Arquivos de neuro-psiquiatria

    2016  Volume 74, Issue 11, Page(s) 869–874

    Abstract: Methods: Review of hospital records and structured telephone interviews of 100 consecutive stroke patients. Forward stepwise logistic regression was used for the statistical analysis.: Results: Seventy patients (75%) arrived at the hospital 4.5 hours ...

    Abstract Methods: Review of hospital records and structured telephone interviews of 100 consecutive stroke patients. Forward stepwise logistic regression was used for the statistical analysis.
    Results: Seventy patients (75%) arrived at the hospital 4.5 hours after stroke symptoms onset. The use of EMS did not improve arrival times. Most patients who recognized their symptoms did not use EMS (p < 0.02). Nineteen patients (20%) were initially misdiagnosed. Eighteen of them were first assessed by non-neurologist physicians (p < 0.001).
    Conclusions: Our population showed a low level of stroke awareness. The use of EMS did not improve arrival times at the hospital and the non-utilization of the EMS was associated with the recognition of stroke symptoms. There was a concerning rate of misdiagnosis, mostly by non-neurologist medical providers.
    MeSH term(s) Aged ; Aged, 80 and over ; Argentina ; Awareness ; Delayed Diagnosis/statistics & numerical data ; Diagnostic Errors/statistics & numerical data ; Educational Status ; Emergency Medical Services/statistics & numerical data ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Stroke/diagnosis ; Surveys and Questionnaires ; Tertiary Care Centers/statistics & numerical data ; Time Factors
    Language English
    Publishing date 2016-11-24
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 418916-4
    ISSN 1678-4227 ; 0004-282X
    ISSN (online) 1678-4227
    ISSN 0004-282X
    DOI 10.1590/0004-282X20160142
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Anti-inflammatory effects of melatonin in multiple sclerosis.

    Farez, Mauricio F / Calandri, Ismael L / Correale, Jorge / Quintana, Francisco J

    BioEssays : news and reviews in molecular, cellular and developmental biology

    2016  Volume 38, Issue 10, Page(s) 1016–1026

    Abstract: Melatonin is a hormone with complex roles in the pathogenesis of autoimmune disorders. Over the years, it has become clear that melatonin may exacerbate some autoimmune conditions, whereas it alleviates others such as multiple sclerosis. Multiple ... ...

    Abstract Melatonin is a hormone with complex roles in the pathogenesis of autoimmune disorders. Over the years, it has become clear that melatonin may exacerbate some autoimmune conditions, whereas it alleviates others such as multiple sclerosis. Multiple sclerosis is an autoimmune disorder characterized by a dysregulated immune response directed against the central nervous system. Indeed, the balance between pathogenic CD4(+) T cells secreting IFN-γ (TH 1) or IL-17 (TH 17); and FoxP3(+) regulatory T cells and IL-10(+) type 1 regulatory T cells (Tr1 cells) is thought to play an important role in disease activity. Recent evidence suggests that melatonin ameliorates multiple sclerosis by controlling the balance between effector and regulatory cells, suggesting that melatonin-triggered signaling pathways are potential targets for therapeutic intervention. Here, we review the available data on the effects of melatonin on immune processes relevant for MS and discuss its therapeutic potential.
    MeSH term(s) Animals ; Anti-Inflammatory Agents/pharmacology ; Anti-Inflammatory Agents/therapeutic use ; Humans ; Immune System/drug effects ; Melatonin/pharmacology ; Melatonin/therapeutic use ; Multiple Sclerosis/drug therapy
    Chemical Substances Anti-Inflammatory Agents ; Melatonin (JL5DK93RCL)
    Language English
    Publishing date 2016-10
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 50140-2
    ISSN 1521-1878 ; 0265-9247
    ISSN (online) 1521-1878
    ISSN 0265-9247
    DOI 10.1002/bies.201600018
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Transient global amnesia: clinical features and prognostic factors suggesting recurrence.

    Alessandro, Lucas / Calandri, Ismael L / Suarez, Marcos Fernández / Heredia, María L / Chaves, Hernán / Allegri, Ricardo F / Farez, Mauricio F

    Arquivos de neuro-psiquiatria

    2019  Volume 77, Issue 1, Page(s) 3–9

    Abstract: Objective: The risk of recurrence of new amnesia events in patients having previously experienced transient global amnesia (TGA) ranges between 2.9-23.8%. Our objective was to search for recurrence predictors in TGA patients.: Methods: Retrospective ... ...

    Abstract Objective: The risk of recurrence of new amnesia events in patients having previously experienced transient global amnesia (TGA) ranges between 2.9-23.8%. Our objective was to search for recurrence predictors in TGA patients.
    Methods: Retrospective analysis to identify recurrence predictors in a cohort of 203 TGA patients from a single center in Buenos Aires, Argentina, diagnosed between January 2011 and March 2017 Clinical features and complementary studies (laboratory results, jugular vein Doppler ultrasound and brain MRI) were analyzed. Comparison between patients with recurrent versus single episode TGA was performed, applying a multivariate logistic regression model.
    Results: Mean age at presentation was 65 years (20-84); 52% were female. Median time elapsed between symptom onset and ER visit was two hours, with the average episode duration lasting four hours. Mean follow-up was 22 months. Sixty-six percent of patients referred to an identifiable trigger. Jugular reflux was present in 66% of patients; and 22% showed images with hippocampus restriction on diffusion-weighted MRI. Eight percent of patients had TGA recurrence. Patients with recurrent TGA had a more frequent history of migraine than patients without recurrence (37.5% vs. 14%; p = 0.03). None of the other clinical characteristics and complementary studies were predictors of increased risk of recurrence.
    Conclusions: Patients with migraine may have a higher risk of recurrent TGA. None of the other clinical characteristics evaluated allowed us to predict an increased risk of recurrence. Although the complementary studies allowed us to guide the diagnosis, they did not appear to have a significant impact on the prediction of recurrence risk.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Amnesia, Transient Global/diagnostic imaging ; Amnesia, Transient Global/etiology ; Amnesia, Transient Global/physiopathology ; Female ; Humans ; Jugular Veins/physiopathology ; Logistic Models ; Male ; Middle Aged ; Migraine Disorders/complications ; Migraine Disorders/physiopathology ; Prognosis ; Recurrence ; Retrospective Studies ; Risk Factors
    Language English
    Publishing date 2019-03-12
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 418916-4
    ISSN 1678-4227 ; 0004-282X
    ISSN (online) 1678-4227
    ISSN 0004-282X
    DOI 10.1590/0004-282X20180157
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: A task force for diagnosis and treatment of people with Alzheimer's disease in Latin America.

    Lopera, Francisco / Custodio, Nilton / Rico-Restrepo, Mariana / Allegri, Ricardo F / Barrientos, José Domingo / Garcia Batres, Estuardo / Calandri, Ismael L / Calero Moscoso, Cristian / Caramelli, Paulo / Duran Quiroz, Juan Carlos / Jansen, Angela Marie / Mimenza Alvarado, Alberto José / Nitrini, Ricardo / Parodi, Jose F / Ramos, Claudia / Slachevsky, Andrea / Brucki, Sonia María Dozzi

    Frontiers in neurology

    2023  Volume 14, Page(s) 1198869

    Abstract: Alzheimer's disease (AD) represents a substantial burden to patients, their caregivers, health systems, and society in Latin America and the Caribbean (LAC). This impact is exacerbated by limited access to diagnosis, specialized care, and therapies for ... ...

    Abstract Alzheimer's disease (AD) represents a substantial burden to patients, their caregivers, health systems, and society in Latin America and the Caribbean (LAC). This impact is exacerbated by limited access to diagnosis, specialized care, and therapies for AD within and among nations. The region has varied geographic, ethnic, cultural, and economic conditions, which create unique challenges to AD diagnosis and management. To address these issues, the Americas Health Foundation convened a panel of eight neurologists, geriatricians, and psychiatrists from Argentina, Brazil, Colombia, Ecuador, Guatemala, Mexico, and Peru who are experts in AD for a three-day virtual meeting to discuss best practices for AD diagnosis and treatment in LAC and create a manuscript offering recommendations to address identified barriers. In LAC, several barriers hamper diagnosing and treating people with dementia. These barriers include access to healthcare, fragmented healthcare systems, limited research funding, unstandardized diagnosis and treatment, genetic heterogeneity, and varying social determinants of health. Additional training for physicians and other healthcare workers at the primary care level, region-specific or adequately adapted cognitive tests, increased public healthcare insurance coverage of testing and treatment, and dedicated search strategies to detect populations with gene variants associated with AD are among the recommendations to improve the landscape of AD.
    Language English
    Publishing date 2023-07-11
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2564214-5
    ISSN 1664-2295
    ISSN 1664-2295
    DOI 10.3389/fneur.2023.1198869
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Perception of stroke symptoms and utilization of emergency medical services

    Hawkes, Maximiliano A. / Farez, Mauricio F. / Calandri, Ismael L. / Ameriso, Sebastián F.

    Arquivos de Neuro-Psiquiatria

    2016  Volume 74, Issue 11, Page(s) 869–874

    Abstract: Lack of stroke awareness and slow activation of emergency medical services (EMS) are frequently reported reasons for delayed arrival to the hospital. We evaluated these variables in our population. : Methods: Review of hospital records and structured ... ...

    Abstract Lack of stroke awareness and slow activation of emergency medical services (EMS) are frequently reported reasons for delayed arrival to the hospital. We evaluated these variables in our population.
    Methods: Review of hospital records and structured telephone interviews of 100 consecutive stroke patients. Forward stepwise logistic regression was used for the statistical analysis.
    Results: Seventy patients (75%) arrived at the hospital 4.5 hours after stroke symptoms onset. The use of EMS did not improve arrival times. Most patients who recognized their symptoms did not use EMS (p < 0.02). Nineteen patients (20%) were initially misdiagnosed. Eighteen of them were first assessed by non-neurologist physicians (p < 0.001).
    Conclusions: Our population showed a low level of stroke awareness. The use of EMS did not improve arrival times at the hospital and the non-utilization of the EMS was associated with the recognition of stroke symptoms. There was a concerning rate of misdiagnosis, mostly by non-neurologist medical providers.
    Keywords stroke ; emergency medical system ; accidente cerebrovascular ; servicios de emergencias médico
    Language English
    Publishing date 2016-11-01
    Publisher Thieme Revinter Publicações Ltda.
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 418916-4
    ISSN 1678-4227 ; 0004-282X
    ISSN (online) 1678-4227
    ISSN 0004-282X
    DOI 10.1590/0004-282X20160142
    Database Thieme publisher's database

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  8. Article: Transient global amnesia: clinical features and prognostic factors suggesting recurrence

    Alessandro, Lucas / Calandri, Ismael L. / Suarez, Marcos Fernández / Heredia, María L. / Chaves, Hernán / Allegri, Ricardo F. / Farez, Mauricio F.

    Arquivos de Neuro-Psiquiatria

    2019  Volume 77, Issue 01, Page(s) 3–9

    Abstract: The risk of recurrence of new amnesia events in patients having previously experienced transient global amnesia (TGA) ranges between 2.9-23.8%.: Objective: Our objective was to search for recurrence predictors in TGA patients.: Methods: ... ...

    Abstract The risk of recurrence of new amnesia events in patients having previously experienced transient global amnesia (TGA) ranges between 2.9-23.8%.
    Objective: Our objective was to search for recurrence predictors in TGA patients.
    Methods: Retrospective analysis to identify recurrence predictors in a cohort of 203 TGA patients from a single center in Buenos Aires, Argentina, diagnosed between January 2011 and March 2017 Clinical features and complementary studies (laboratory results, jugular vein Doppler ultrasound and brain MRI) were analyzed. Comparison between patients with recurrent versus single episode TGA was performed, applying a multivariate logistic regression model.
    Results: Mean age at presentation was 65 years (20-84); 52% were female. Median time elapsed between symptom onset and ER visit was two hours, with the average episode duration lasting four hours. Mean follow-up was 22 months. Sixty-six percent of patients referred to an identifiable trigger. Jugular reflux was present in 66% of patients; and 22% showed images with hippocampus restriction on diffusion-weighted MRI. Eight percent of patients had TGA recurrence. Patients with recurrent TGA had a more frequent history of migraine than patients without recurrence (37.5% vs. 14%; p = 0.03). None of the other clinical characteristics and complementary studies were predictors of increased risk of recurrence.
    Conclusions: Patients with migraine may have a higher risk of recurrent TGA. None of the other clinical characteristics evaluated allowed us to predict an increased risk of recurrence. Although the complementary studies allowed us to guide the diagnosis, they did not appear to have a significant impact on the prediction of recurrence risk.
    Keywords Amnesia, anterograde ; recurrence ; amnesia, transient global ; Amnesia anterógrada ; recurrencia ; amnesia global transitoria
    Language English
    Publishing date 2019-01-01
    Publisher Thieme Revinter Publicações Ltda.
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 418916-4
    ISSN 1678-4227 ; 0004-282X
    ISSN (online) 1678-4227
    ISSN 0004-282X
    DOI 10.1590/0004-282X20180157
    Database Thieme publisher's database

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  9. Article ; Online: Working Group Recommendations for the Practice of Teleneuropsychology in Latin America.

    Crivelli, Lucía / Quiroz, Yakeel T / Calandri, Ismael L / Martin, María E / Velilla, Lina M / Cusicanqui, María I / Yglesias, Fernando Coto / Llibre-Rodríguez, Juan J / Armele, Monserrat / Román, Fabián / Barceló, Ernesto / Dechent, Claudia / Carello, María Agostina / Olavarría, Loreto / Yassuda, Mônica S / Custodio, Nilton / Dansilio, Sergio / Sosa, Ana L / Acosta, Daisy M /
    Brucki, Sonia M D / Caramelli, Paulo / Slachevsky, Andrea / Nitrini, Ricardo / Carrillo, María C / Allegri, Ricardo F

    Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists

    2021  Volume 37, Issue 3, Page(s) 553–567

    Abstract: Objective: Teleneuropsychology (teleNP) could potentially expand access to services for patients who are confined, have limited personal access to healthcare, or live in remote areas. The emergence of the COVID-19 pandemic has significantly increased ... ...

    Abstract Objective: Teleneuropsychology (teleNP) could potentially expand access to services for patients who are confined, have limited personal access to healthcare, or live in remote areas. The emergence of the COVID-19 pandemic has significantly increased the use of teleNP for cognitive assessments. The main objective of these recommendations is to identify which procedures can be potentially best adapted to the practice of teleNP in Latin America, and thereby facilitate professional decision-making in the region.
    Method: Steps taken to develop these recommendations included (1) formation of an international working group with representatives from 12 Latin American countries; (2) assessment of rationale, scope, and objectives; (3) formulation of clinical questions; (4) evidence search and selection; (5) evaluation of existing evidence and summary; and (6) formulation of recommendations. Levels of evidence were graded following the Oxford Centre for Evidence-Based Medicine system. Databases examined included PubMed, WHO-IRIS, WHO and PAHO-IRIS, Índice Bibliográfico Español en Ciencias de la Salud (IBCS), and LILACS.
    Results: Working group members reviewed 18,400 titles and 422 abstracts and identified 19 articles meeting the criteria for level of evidence, categorization, and elaboration of recommendations. The vast majority of the literature included teleNP tests in the English language. The working group proposed a series of recommendations that can be potentially best adapted to the practice of teleNP in Latin America.
    Conclusions: There is currently sufficient evidence to support the use of videoconferencing technology for remote neuropsychological assessments. These recommendations will likely contribute to the advancement of teleNP research and practice in the region.
    MeSH term(s) COVID-19 ; Humans ; Latin America ; Neuropsychological Tests ; Neuropsychology/methods ; Pandemics
    Language English
    Publishing date 2021-10-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632972-x
    ISSN 1873-5843 ; 0887-6177
    ISSN (online) 1873-5843
    ISSN 0887-6177
    DOI 10.1093/arclin/acab080
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Perivenular brain lesions in a primate multiple sclerosis model at 7-tesla magnetic resonance imaging.

    Gaitán, María I / Maggi, Pietro / Wohler, Jillian / Leibovitch, Emily / Sati, Pascal / Calandri, Ismael L / Merkle, Hellmut / Massacesi, Luca / Silva, Afonso C / Jacobson, Steven / Reich, Daniel S

    Multiple sclerosis (Houndmills, Basingstoke, England)

    2013  Volume 20, Issue 1, Page(s) 64–71

    Abstract: BACKGROUND Magnetic resonance imaging (MRI) can provide in vivo assessment of tissue damage, allowing evaluation of multiple sclerosis (MS) lesion evolution over time--a perspective not obtainable with postmortem histopathology. Relapsing-remitting ... ...

    Abstract BACKGROUND Magnetic resonance imaging (MRI) can provide in vivo assessment of tissue damage, allowing evaluation of multiple sclerosis (MS) lesion evolution over time--a perspective not obtainable with postmortem histopathology. Relapsing-remitting experimental autoimmune encephalomyelitis (EAE) is an experimental model of MS that can be induced in the common marmoset, a small new world primate, and that causes perivenular white matter (WM) lesions similar to those observed in MS. METHODS Brain lesion development and evolution were studied in vivo and postmortem in four marmosets with EAE through serial T2- and T2*-weighted scans at 7-tesla. Supratentorial WM lesions were identified and characterized. RESULTS Of 97 lesions observed, 86 (88%) were clearly perivenular, and 62 (72%) developed around veins that were visible even prior to EAE induction. The perivenular configuration was confirmed by postmortem histopathology. Most affected veins, and their related perivascular Virchow-Robin spaces, passed into the subarachnoid space rather than the ventricles. CONCLUSION As in human MS, the intimate association between small veins and EAE lesions in the marmoset can be studied with serial in vivo MRI. This further strengthens the usefulness of this model for understanding the process of perivenular lesion development and accompanying tissue destruction in MS.
    MeSH term(s) Animals ; Brain/pathology ; Callithrix ; Disease Models, Animal ; Encephalomyelitis, Autoimmune, Experimental/pathology ; Female ; Image Processing, Computer-Assisted ; Magnetic Resonance Imaging/methods ; Male ; Multiple Sclerosis, Relapsing-Remitting/pathology
    Language English
    Publishing date 2013-06-17
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Intramural
    ZDB-ID 1290669-4
    ISSN 1477-0970 ; 1352-4585
    ISSN (online) 1477-0970
    ISSN 1352-4585
    DOI 10.1177/1352458513492244
    Database MEDical Literature Analysis and Retrieval System OnLINE

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