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  1. Article ; Online: Relationships of Hemoglobin Concentration, Ischemic Lesions, and Clinical Outcomes in Patients With Intracerebral Hemorrhage.

    Roh, David J / Boehme, Amelia / Mamoon, Rayan / Hooper, Destiny / Cottarelli, Azzurra / Ji, Robin / Mao, Eric / Kumar, Aditya / Carvalho Poyraz, Fernanda / Demel, Stacie L / Spektor, Vadim / Carmona, Jerina / Hod, Eldad A / Ironside, Natasha / Gutierrez, Jose / Guo, Jia / Konofagou, Elisa / Elkind, Mitchell S V / Woo, Daniel

    Stroke

    2023  Volume 54, Issue 4, Page(s) 1021–1029

    Abstract: Background: Hemoglobin concentration and diffusion-weighted imaging (DWI) ischemic lesions are separately known to be associated with poor intracerebral hemorrhage (ICH) outcomes. While hemoglobin concentrations have known relationships with ischemic ... ...

    Abstract Background: Hemoglobin concentration and diffusion-weighted imaging (DWI) ischemic lesions are separately known to be associated with poor intracerebral hemorrhage (ICH) outcomes. While hemoglobin concentrations have known relationships with ischemic stroke, it is unclear whether hemoglobin concentration is associated with DWI ischemic lesions after ICH. We sought to investigate the hypothesis that hemoglobin concentrations would associate with DWI lesions after ICH and further investigated their relationships with clinical outcomes.
    Methods: Supratentorial ICH patients enrolled between 2010 and 2016 to a prospective, multicenter, observational cohort study (ERICH study [Ethnic/Racial Variations of Intracerebral Hemorrhage]) were assessed. Patients from this study with baseline, admission hemoglobin, and hospitalization magnetic resonance imaging were analyzed. Hemoglobin was examined as the primary exposure variable defined as a continuous variable (g/dL). Magnetic resonance imaging DWI ischemic lesion presence was assessed as the primary radiographic outcome. Primary analyses assessed relationships of hemoglobin with DWI lesions. Secondary analyses assessed relationships of DWI lesions with poor 3-month outcomes (modified Rankin Scale score, 4-6). These analyses were performed using separate multivariable logistic regression models adjusting for relevant covariates.
    Results: Of 917 patients with ICH analyzed, mean baseline hemoglobin was 13.8 g/dL (±1.9), 60% were deep ICH, and DWI lesions were identified in 27% of the cohort. In our primary analyses, increased hemoglobin, defined as a continuous variable, was associated with DWI lesions (adjusted odds ratio, 1.21 per 1 g/dL change in hemoglobin [95% CI, 1.07-1.37]) after adjusting for sex, race, ICH severity, time to magnetic resonance imaging, and acute blood pressure change. In secondary analyses, DWI lesions were associated with poor 3-month outcomes (adjusted odds ratio, 1.83 [95% CI, 1.24-2.69]) after adjusting for similar covariates.
    Conclusions: We identified novel relationships between higher baseline hemoglobin concentrations and DWI ischemic lesions in patients with ICH. Further studies are required to clarify the role of hemoglobin concentration on both cerebral small vessel disease pathophysiology and ICH outcomes.
    MeSH term(s) Humans ; Prospective Studies ; Cerebral Hemorrhage/complications ; Magnetic Resonance Imaging ; Diffusion Magnetic Resonance Imaging/methods ; Hemoglobins
    Chemical Substances Hemoglobins
    Language English
    Publishing date 2023-02-13
    Publishing country United States
    Document type Observational Study ; Multicenter Study ; Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 80381-9
    ISSN 1524-4628 ; 0039-2499 ; 0749-7954
    ISSN (online) 1524-4628
    ISSN 0039-2499 ; 0749-7954
    DOI 10.1161/STROKEAHA.122.041410
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Relationships of Hematocrit With Chronic Covert and Acute Symptomatic Lacunar Ischemic Lesions.

    Roh, David J / Murguia-Fuentes, Ricardo / Gurel, Kursat / Khasiyev, Farid / Rahman, Salwa / Bueno, Pedro Paiva / Kozii, Khrystyna / Spagnolo-Allende, Antonio J / Cottarelli, Azzurra / Simonetto, Marialaura / Ji, Robin / Guo, Jia / Spektor, Vadim / Hod, Eldad A / Burke, Devin J / Konofagou, Elisa / Rundek, Tatjana / Wright, Clinton B / Marshall, Randolph S /
    Elkind, Mitchell S V / Gutierrez, Jose

    Neurology

    2023  Volume 102, Issue 2, Page(s) e207961

    Abstract: Background and objectives: Red blood cell (RBC) concentrations are known to associate with ischemic stroke. It is unclear whether RBC concentrations associate specifically with small vessel disease lacunar infarcts. We investigated the hypothesis that ... ...

    Abstract Background and objectives: Red blood cell (RBC) concentrations are known to associate with ischemic stroke. It is unclear whether RBC concentrations associate specifically with small vessel disease lacunar infarcts. We investigated the hypothesis that RBC concentrations associate with both chronic covert and acute symptomatic brain MRI lacunar infarcts.
    Methods: A cross-sectional observational analysis was performed across 2 cohorts with available hematocrit (as the assessment of RBC concentration exposure) and MRI outcome data. The primary setting was a population-based cohort of stroke-free, older adult (>50 years) participants from the Northern Manhattan Study (NOMAS) enrolled between 2003 and 2009. A second replication sample consisted of patients admitted with acute stroke and enrolled into the Columbia Stroke Registry (CSR) between 2005 and 2020. Associations of hematocrit with (1) chronic, covert lacunar infarcts and (2) symptomatic (i.e., acute) lacunar strokes were separately assessed from the NOMAS and CSR cohorts, respectively, using general additive models after adjusting for relevant covariates.
    Results: Of 1,218 NOMAS participants analyzed, 6% had chronic, covert lacunar infarcts. The association between hematocrit and these covert lacunar infarcts was U-shaped (χ
    Discussion: We identified relationships of hematocrit with MRI lacunar infarcts in both stroke-free and ischemic stroke cohorts, respectively. The relationship between increased hematocrit concentrations with lacunar infarcts was replicated in both cohorts. Further studies are required to clarify the mechanisms behind the relationships of hematocrit with ischemic cerebral small vessel disease.
    MeSH term(s) Aged ; Humans ; Cross-Sectional Studies ; Hematocrit ; Ischemic Stroke ; Noma ; Stroke ; Stroke, Lacunar/diagnostic imaging ; Middle Aged
    Language English
    Publishing date 2023-12-19
    Publishing country United States
    Document type Journal Article ; Observational Study
    ZDB-ID 207147-2
    ISSN 1526-632X ; 0028-3878
    ISSN (online) 1526-632X
    ISSN 0028-3878
    DOI 10.1212/WNL.0000000000207961
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Radiomics and radiogenomics in gliomas: a contemporary update.

    Singh, Gagandeep / Manjila, Sunil / Sakla, Nicole / True, Alan / Wardeh, Amr H / Beig, Niha / Vaysberg, Anatoliy / Matthews, John / Prasanna, Prateek / Spektor, Vadim

    British journal of cancer

    2021  Volume 125, Issue 5, Page(s) 641–657

    Abstract: The natural history and treatment landscape of primary brain tumours are complicated by the varied tumour behaviour of primary or secondary gliomas (high-grade transformation of low-grade lesions), as well as the dilemmas with identification of radiation ...

    Abstract The natural history and treatment landscape of primary brain tumours are complicated by the varied tumour behaviour of primary or secondary gliomas (high-grade transformation of low-grade lesions), as well as the dilemmas with identification of radiation necrosis, tumour progression, and pseudoprogression on MRI. Radiomics and radiogenomics promise to offer precise diagnosis, predict prognosis, and assess tumour response to modern chemotherapy/immunotherapy and radiation therapy. This is achieved by a triumvirate of morphological, textural, and functional signatures, derived from a high-throughput extraction of quantitative voxel-level MR image metrics. However, the lack of standardisation of acquisition parameters and inconsistent methodology between working groups have made validations unreliable, hence multi-centre studies involving heterogenous study populations are warranted. We elucidate novel radiomic and radiogenomic workflow concepts and state-of-the-art descriptors in sub-visual MR image processing, with relevant literature on applications of such machine learning techniques in glioma management.
    MeSH term(s) Brain Neoplasms/diagnostic imaging ; Brain Neoplasms/genetics ; Brain Neoplasms/pathology ; Genomics/methods ; Glioma/diagnostic imaging ; Glioma/genetics ; Glioma/pathology ; Humans ; Machine Learning ; Magnetic Resonance Imaging ; Neoplasm Grading ; Prognosis ; Radiographic Image Interpretation, Computer-Assisted/methods
    Language English
    Publishing date 2021-05-06
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 80075-2
    ISSN 1532-1827 ; 0007-0920
    ISSN (online) 1532-1827
    ISSN 0007-0920
    DOI 10.1038/s41416-021-01387-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Neurolymphomatosis of the peripheral nervous system: a case report and review of the literature.

    Sideras, Panagiotis A / Matthews, John / Sakib, S M Nazmus / Ofikwu, Franka / Spektor, Vadim

    Clinical imaging

    2016  Volume 40, Issue 6, Page(s) 1253–1256

    Abstract: Neurolymphomatosis is a rare neurological syndrome in lymphomas. It is reported as infiltration of peripheral nerves by lymphoma. It is important to distinguish neurolymphomatosis from other types of neuropathies, particularly infectious and inflammatory ...

    Abstract Neurolymphomatosis is a rare neurological syndrome in lymphomas. It is reported as infiltration of peripheral nerves by lymphoma. It is important to distinguish neurolymphomatosis from other types of neuropathies, particularly infectious and inflammatory conditions. However, it is difficult to isolate a cancer-related inflammatory vasculitis and mononeuritis multiplex without definitive histopathologic examination. In this report, we describe a case of non-Hodgkin's lymphoma involving the peroneal nerve and presenting as neurolymphomatosis.
    MeSH term(s) Aged ; Animals ; Female ; Fluorodeoxyglucose F18 ; Humans ; Lymphoma, Non-Hodgkin/diagnostic imaging ; Lymphoma, Non-Hodgkin/pathology ; Magnetic Resonance Imaging ; Neoplasm Invasiveness ; Peroneal Nerve/diagnostic imaging ; Peroneal Nerve/pathology ; Positron Emission Tomography Computed Tomography ; Radiopharmaceuticals
    Chemical Substances Radiopharmaceuticals ; Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2016-11
    Publishing country United States
    Document type Case Reports ; Journal Article ; Review
    ZDB-ID 1028123-x
    ISSN 1873-4499 ; 0899-7071
    ISSN (online) 1873-4499
    ISSN 0899-7071
    DOI 10.1016/j.clinimag.2016.08.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Takeoff orientation of the major aortic arch branches irrespective of arch type: Ramifications for brachiocephalic interventions including carotid stenting.

    Tayal, Rajiv / Khakwani, M Zain / Lesar, Benjamin / Sinclair, Michael / Emporelli, Afroditi / Spektor, Vadim / Cohen, Marc / Wasty, Najam

    SAGE open medicine

    2018  Volume 6, Page(s) 2050312118776717

    Abstract: Background: Our previous work demonstrating great ease and predictability of cannulation of the major aortic arch branches with an upwardly pointing 3DR catheter, irrespective of aortic arch type, led us to hypothesize that centering or "cresting" of ... ...

    Abstract Background: Our previous work demonstrating great ease and predictability of cannulation of the major aortic arch branches with an upwardly pointing 3DR catheter, irrespective of aortic arch type, led us to hypothesize that centering or "cresting" of these vessels must occur along the superior most aspect of the aortic arch in a curvilinear fashion.
    Methods: We retrospectively analyzed 111 computed tomographic scans of the chest and thoracic aorta with intravenous contrast performed at our hospital between April 2011 and May 2012 utilizing TeraRecon image reconstruction software. Four studies were excluded due to poor image quality and/or surgical changes to native aortic architecture.
    Results: Of the 107 studies included, 104 (97.2%) demonstrated centering of the major aortic arch branches on a curvilinear line "cresting" the superior most aspect of the aortic arch irrespective of arch type. Of the three studies that did not demonstrate this "cresting," two were found to have aberrant right subclavian arteries associated with a type I aortic arch, and one had an aberrant right common carotid associated with a type II aortic arch.
    Conclusion: Operators engaging major aortic arch branches need to be mindful of the fact that these vessels are indeed centered on a line "cresting" along the superior most aspect of the aortic arch, and any algorithm that, by taking this information into account, reduces catheter manipulation in the aortic arch could potentially result in a reduction in distal atheroembolic events.
    Language English
    Publishing date 2018-05-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2735399-0
    ISSN 2050-3121
    ISSN 2050-3121
    DOI 10.1177/2050312118776717
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Multidisciplinary Guidance to Manage Comatose Patients with Severe COVID-19.

    Waldman, Genna J / Thakur, Kiran T / Der Nigoghossian, Caroline / Spektor, Vadim / Mendiratta, Anil / Bell, Michelle / Bautista, Alyssa E / Lennihan, Laura / Willey, Joshua Z / Claassen, Jan

    Annals of neurology

    2020  Volume 88, Issue 4, Page(s) 653–655

    MeSH term(s) Adult ; Aged ; Betacoronavirus ; Brain/diagnostic imaging ; COVID-19 ; Coma/etiology ; Coma/physiopathology ; Coma/therapy ; Coronavirus Infections/complications ; Coronavirus Infections/therapy ; Disease Management ; Electroencephalography ; Female ; Humans ; Hypnotics and Sedatives/adverse effects ; Hypoxia, Brain/complications ; Interdisciplinary Communication ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Neurology ; Pandemics ; Pneumonia, Viral/complications ; Pneumonia, Viral/therapy ; Referral and Consultation ; SARS-CoV-2 ; Telecommunications ; Young Adult
    Chemical Substances Hypnotics and Sedatives
    Keywords covid19
    Language English
    Publishing date 2020-08-13
    Publishing country United States
    Document type Editorial ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 80362-5
    ISSN 1531-8249 ; 0364-5134
    ISSN (online) 1531-8249
    ISSN 0364-5134
    DOI 10.1002/ana.25830
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: CT and MR imaging of Susac syndrome in a young male presenting with acute disorientation.

    Allmendinger, Andrew M / Spektor, Vadim / Destian, Sylvie

    Clinical imaging

    2010  Volume 34, Issue 2, Page(s) 138–142

    Abstract: Susac syndrome is a rare neurologic disorder first described by Susac et al. in 1979. Clinically, Susac syndrome consists of a triad including encephalopathy, branch retinal artery occlusion, and sensorineural hearing loss. Microinfarction is believed to ...

    Abstract Susac syndrome is a rare neurologic disorder first described by Susac et al. in 1979. Clinically, Susac syndrome consists of a triad including encephalopathy, branch retinal artery occlusion, and sensorineural hearing loss. Microinfarction is believed to be the basic histologic feature and MR is considered the best imaging modality. This case documents the typical imaging findings of Susac syndrome, as well as the unique MR imaging finding of cranial nerve enhancement.
    MeSH term(s) Acute Disease ; Adult ; Brain/diagnostic imaging ; Brain/pathology ; Confusion/diagnosis ; Diffusion Magnetic Resonance Imaging/methods ; Humans ; Male ; Susac Syndrome/diagnosis ; Tomography, X-Ray Computed/methods
    Language English
    Publishing date 2010-03
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 1028123-x
    ISSN 1873-4499 ; 0899-7071
    ISSN (online) 1873-4499
    ISSN 0899-7071
    DOI 10.1016/j.clinimag.2009.09.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Imaging of stroke: Part 1, Perfusion CT--overview of imaging technique, interpretation pearls, and common pitfalls.

    Allmendinger, Andrew Mark / Tang, Elizabeth R / Lui, Yvonne W / Spektor, Vadim

    AJR. American journal of roentgenology

    2012  Volume 198, Issue 1, Page(s) 52–62

    Abstract: Objective: Perfusion CT is being increasingly used as a diagnostic tool for the evaluation of acute ischemic stroke. It can be performed rapidly and aids in the detection of salvageable tissue (penumbra) from the unsalvageable core infarct. The purpose ... ...

    Abstract Objective: Perfusion CT is being increasingly used as a diagnostic tool for the evaluation of acute ischemic stroke. It can be performed rapidly and aids in the detection of salvageable tissue (penumbra) from the unsalvageable core infarct. The purpose of this article is to provide an overview of the imaging technique, interpretation pearls, and common pitfalls encountered in perfusion CT of the brain.
    Conclusion: Perfusion CT has proven to be a valuable tool in the diagnosis of acute ischemic stroke. The knowledge provided by these cases will allow the reader not only to confidently identify the presence of acute ischemic stroke, but also to recognize the common pitfalls and limitations of perfusion CT in this setting.
    MeSH term(s) Acute Disease ; Brain Ischemia/diagnostic imaging ; Cerebrovascular Circulation ; Contrast Media ; Diagnosis, Differential ; Humans ; Neuroimaging/methods ; Radiographic Image Interpretation, Computer-Assisted ; Stroke/diagnostic imaging ; Tomography, X-Ray Computed/methods
    Chemical Substances Contrast Media
    Language English
    Publishing date 2012-01
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 82076-3
    ISSN 1546-3141 ; 0361-803X ; 0092-5381
    ISSN (online) 1546-3141
    ISSN 0361-803X ; 0092-5381
    DOI 10.2214/AJR.10.7255
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Multidisciplinary Guidance to Manage Comatose Patients with Severe COVID-19

    Waldman, Genna J / Thakur, Kiran T / Der Nigoghossian, Caroline / Spektor, Vadim / Mendiratta, Anil / Bell, Michelle / Bautista, Alyssa E / Lennihan, Laura / Willey, Joshua Z / Claassen, Jan

    Ann Neurol

    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #614416
    Database COVID19

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  10. Article ; Online: Multidisciplinary Guidance to Manage Comatose Patients with Severe COVID ‐19

    Waldman, Genna J. / Thakur, Kiran T. / Der Nigoghossian, Caroline / Spektor, Vadim / Mendiratta, Anil / Bell, Michelle / Bautista, Alyssa E. / Lennihan, Laura / Willey, Joshua Z. / Claassen, Jan

    Annals of Neurology

    2020  Volume 88, Issue 4, Page(s) 653–655

    Keywords Neurology ; Clinical Neurology ; covid19
    Language English
    Publisher Wiley
    Publishing country us
    Document type Article ; Online
    ZDB-ID 80362-5
    ISSN 1531-8249 ; 0364-5134
    ISSN (online) 1531-8249
    ISSN 0364-5134
    DOI 10.1002/ana.25830
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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