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  1. Article ; Online: Functional disorders as a common motor manifestation of COVID-19 infection or vaccination.

    Fung, Wilson K W / Sa'di, Qais / Katzberg, Hans / Chen, Robert / Lang, Anthony E / Cheung, Angela M / Fasano, Alfonso

    European journal of neurology

    2022  Volume 30, Issue 3, Page(s) 678–691

    Abstract: Background and purpose: There have been over 500 million confirmed cases of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), also known as coronavirus disease 2019 (COVID-19), across the globe. To date, a broad spectrum of neurological ... ...

    Abstract Background and purpose: There have been over 500 million confirmed cases of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), also known as coronavirus disease 2019 (COVID-19), across the globe. To date, a broad spectrum of neurological manifestations following acute infections as well as COVID-19 vaccines have been reported. The aim of this study was to describe the spectrum of neurological manifestations seen in the 'COVID-19 clinic' established in a tertiary Movement Disorders clinic.
    Methods: In this consecutive case-series study over the period March 2020-January 2022, clinical information regarding demographic data, clinical history and examination findings, investigation results and video recordings of outpatients with motor manifestations associated with COVID-19 infection or vaccination were reviewed.
    Results: Twenty-one adult patients were reviewed in this ad hoc clinic at Toronto Western Hospital. The majority of the patients were female (76%) and the mean (range) age was 50.7 ± 17.2 (21-80) years. Nine patients (43%) presented with motor manifestations following COVID-19 infection. Twelve patients (57%) developed neurological symptoms following at least one dose of the mRNA or viral vector-based COVID-19 vaccine. The most common manifestation observed was a functional movement disorder (43%). The vaccine group demonstrated a higher number of functional disorders compared to the infection group (58% vs. 22%; p = 0.08).
    Conclusion: Functional motor manifestations can be associated with COVID-19 and are likely to be under-reported. In view of the co-existence of functional symptoms, movement disorders and mental health conditions observed in this study, we would advocate the use of dedicated COVID-19 Neurology clinics with full access to an experienced multidisciplinary team.
    MeSH term(s) Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; COVID-19/complications ; COVID-19/prevention & control ; COVID-19 Vaccines/adverse effects ; Movement Disorders ; SARS-CoV-2 ; Vaccination/adverse effects
    Chemical Substances COVID-19 Vaccines
    Language English
    Publishing date 2022-12-08
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1280785-0
    ISSN 1468-1331 ; 1351-5101 ; 1471-0552
    ISSN (online) 1468-1331
    ISSN 1351-5101 ; 1471-0552
    DOI 10.1111/ene.15630
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Noninvasive measurement of renal hemodynamic functions with gadolinium-enhanced MR imaging.

    Katzberg, R W

    Radiology

    1999  Volume 210, Issue 1, Page(s) 287–288

    MeSH term(s) Contrast Media ; Gadolinium DTPA ; Glomerular Filtration Rate ; Humans ; Magnetic Resonance Imaging ; Renal Circulation
    Chemical Substances Contrast Media ; Gadolinium DTPA (K2I13DR72L)
    Language English
    Publishing date 1999-01
    Publishing country United States
    Document type Comment ; Letter
    ZDB-ID 80324-8
    ISSN 1527-1315 ; 0033-8419
    ISSN (online) 1527-1315
    ISSN 0033-8419
    DOI 10.1148/radiology.210.1.r99ja59287
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Segmental ischemia or tubular obstruction in the contralateral kidney of unilateral acute ureteral occlusion?

    Katzberg, R W

    AJR. American journal of roentgenology

    1998  Volume 171, Issue 2, Page(s) 521

    MeSH term(s) Contrast Media/adverse effects ; Diagnosis, Differential ; Humans ; Ischemia/chemically induced ; Ischemia/diagnostic imaging ; Kidney/blood supply ; Kidney Tubular Necrosis, Acute/chemically induced ; Kidney Tubular Necrosis, Acute/diagnostic imaging ; Risk Factors ; Ureteral Obstruction/diagnostic imaging ; Urography
    Chemical Substances Contrast Media
    Language English
    Publishing date 1998-08
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 82076-3
    ISSN 1546-3141 ; 0361-803X ; 0092-5381
    ISSN (online) 1546-3141
    ISSN 0361-803X ; 0092-5381
    DOI 10.2214/ajr.171.2.9694489
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Contrast-induced nephropathy after intravenous administration: fact or fiction?

    Katzberg, Richard W / Lamba, Ramit

    Radiologic clinics of North America

    2009  Volume 47, Issue 5, Page(s) 789–800, v

    Abstract: Recent prospective clinical investigations in high-risk patients receiving intravenous contrast media for computed tomography (CT) suggest that the incidence and serious negative clinical outcomes are much less common than previously believed. Additional ...

    Abstract Recent prospective clinical investigations in high-risk patients receiving intravenous contrast media for computed tomography (CT) suggest that the incidence and serious negative clinical outcomes are much less common than previously believed. Additional perspectives comparing random variations in serum creatinine in subjects not receiving contrast media show similar fluctuations that would equate to contrast-induced nephrotoxicity (CIN). Putative mechanisms for how CIN could cause death or other serious adverse clinical consequences have not been elucidated.
    MeSH term(s) Clinical Trials as Topic ; Contrast Media/administration & dosage ; Contrast Media/adverse effects ; Contrast Media/pharmacokinetics ; Creatinine/blood ; Humans ; Incidence ; Injections, Intra-Arterial ; Injections, Intravenous ; Kidney Diseases/chemically induced ; Kidney Diseases/epidemiology ; Kidney Diseases/physiopathology ; Kidney Function Tests ; Risk Factors
    Chemical Substances Contrast Media ; Creatinine (AYI8EX34EU)
    Language English
    Publishing date 2009-09
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 215712-3
    ISSN 1557-8275 ; 0033-8389
    ISSN (online) 1557-8275
    ISSN 0033-8389
    DOI 10.1016/j.rcl.2009.06.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Electrodiagnostic subtyping in Guillain-Barré syndrome: Use of criteria in practice based on a survey study in IGOS.

    Arends, Samuel / Drenthen, Judith / Van den Bergh, Peter Y K / Hadden, Robert D M / Shahrizaila, Nortina / Dimachkie, Mazen M / Gutiérrez Gutiérrez, Gerardo / Katzberg, Hans / Kiers, Lynette / Lehmann, Helmar C / Péréon, Yann / Reisin, Ricardo C / Uncini, Antonino / Verhamme, Camiel / Waheed, Wagar / Cornblath, David R / Jacobs, Bart C

    Journal of the peripheral nervous system : JPNS

    2022  Volume 27, Issue 3, Page(s) 197–205

    Abstract: Electrodiagnostic (EDx) studies are helpful in diagnosing and subtyping of Guillain-Barré syndrome (GBS). Published criteria for differentiation into GBS subtypes focus on cutoff values, but other items receive less attention, although they may influence ...

    Abstract Electrodiagnostic (EDx) studies are helpful in diagnosing and subtyping of Guillain-Barré syndrome (GBS). Published criteria for differentiation into GBS subtypes focus on cutoff values, but other items receive less attention, although they may influence EDx subtyping: (a) extensiveness of EDx testing, (b) nerve-specific considerations, (c) distal compound muscle action potential (CMAP)-amplitude requirements, (d) criteria for conduction block and temporal dispersion. The aims of this study were to investigate how these aspects were approached by neuromuscular EDx experts in practice and how this was done in previously published EDx criteria for GBS. A completed questionnaire was returned by 24 (of 49) members of the electrophysiology expertise group from the International GBS Outcome Study. Six published EDx criteria for GBS subtyping were compared regarding these aspects. The indicated minimal number of motor nerves to study varied among respondents and tended to be more extensive in equivocal than normal studies. Respondents varied considerably regarding usage of compression sites for subtyping (median/wrist, ulnar/elbow, peroneal/fibular head): 29% used all variables from all sites, 13% excluded all sites, and 58% used only some sites and/or variables. Thirty-eight percent of respondents required a minimal distal CMAP amplitude to classify distal motor latency as demyelinating, and 58% did for motor conduction velocity. For proximal/distal CMAP-amplitude ratio and F-wave latency, a requisite minimal CMAP amplitude was more often required (79%). Also, the various published criteria sets showed differences on all items. Practical use of EDx criteria for subtyping GBS vary extensively across respondents, potentially lowering the reproducibility of GBS subtyping.
    MeSH term(s) Guillain-Barre Syndrome/diagnosis ; Humans ; Neural Conduction/physiology ; Reproducibility of Results ; Surveys and Questionnaires
    Language English
    Publishing date 2022-06-24
    Publishing country United States
    Document type Case Reports
    ZDB-ID 1364009-4
    ISSN 1529-8027 ; 1085-9489
    ISSN (online) 1529-8027
    ISSN 1085-9489
    DOI 10.1111/jns.12504
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Urography into the 21st century: new contrast media, renal handling, imaging characteristics, and nephrotoxicity.

    Katzberg, R W

    Radiology

    1997  Volume 204, Issue 2, Page(s) 297–312

    MeSH term(s) Acute Kidney Injury/chemically induced ; Acute Kidney Injury/prevention & control ; Acute Kidney Injury/therapy ; Animals ; Contrast Media/adverse effects ; Contrast Media/chemistry ; Humans ; Kidney/drug effects ; Osmolar Concentration ; Urography/methods ; Urography/trends
    Chemical Substances Contrast Media
    Language English
    Publishing date 1997-08
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 80324-8
    ISSN 1527-1315 ; 0033-8419
    ISSN (online) 1527-1315
    ISSN 0033-8419
    DOI 10.1148/radiology.204.2.9240511
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Contrast-induced nephrotoxicity: clinical landscape.

    Katzberg, R W / Haller, C

    Kidney international. Supplement

    2005  , Issue 100, Page(s) S3–7

    Abstract: Over 80 million doses of iodinated intravascular contrast media (CM) were administered in the most recent tabulations of 2003, corresponding to approximately 8 million liters, making it one of the highest volume medical drugs used compared to any other ... ...

    Abstract Over 80 million doses of iodinated intravascular contrast media (CM) were administered in the most recent tabulations of 2003, corresponding to approximately 8 million liters, making it one of the highest volume medical drugs used compared to any other pharmaceutical. The evolution of CM has focused on minimizing adverse events by eliminating ionicity, increasing hydrophilicity, lowering osmolality and increasing the number of iodine atoms per molecule. Contrast media are classified into three general categories based on their osmolality relative to blood: high osmolar (5 times or greater than blood), low osmolar (2-3 times blood) and iso-osmolar (the same as blood). All imaging modalities that employ CM, especially computerized tomography (CT), have shown rapid growth. In the last two decades, the use of CT scanning has increased by 800%. From 1979 to 2002, the number of cardiac catheterization procedures in the USA increased by 390% and in Europe from 1992 to 1999 by 112%. There is a general consensus that renal insufficiency and diabetes are major risk factors for contrast-induced nephropathy (CIN), particularly when co-existing. The US Renal Data System documents a 'relentless' increase in kidney failure, projecting a 90% increase by 2010. Diabetes affects 194 million people worldwide and the number is anticipated to increase by 75% by 2025. The unavoidable conclusion is that patient exposure and prevalence of risk factors for CIN will continue to increase.
    MeSH term(s) Contrast Media/adverse effects ; Humans ; Incidence ; Kidney Diseases/chemically induced ; Kidney Diseases/epidemiology ; Osmolar Concentration ; Risk Factors
    Chemical Substances Contrast Media
    Language English
    Publishing date 2005-11-17
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 193442-9
    ISSN 2157-1716 ; 0098-6577 ; 2157-1724
    ISSN (online) 2157-1716
    ISSN 0098-6577 ; 2157-1724
    DOI 10.1038/sj.ki.5000366
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Dynamic MR imaging of the temporomandibular joint using a balanced steady-state free precession sequence at 3T.

    Yen, P / Katzberg, R W / Buonocore, M H / Sonico, J

    AJNR. American journal of neuroradiology

    2011  Volume 34, Issue 3, Page(s) E24–6

    Abstract: The aim of our project was to develop an MR imaging protocol for dynamic imaging of the TMJ. We imaged a total of 24 joints in 12 subjects. We developed an imaging protocol on a 3T system using the true FISP sequence that yielded an acceptable spatial ... ...

    Abstract The aim of our project was to develop an MR imaging protocol for dynamic imaging of the TMJ. We imaged a total of 24 joints in 12 subjects. We developed an imaging protocol on a 3T system using the true FISP sequence that yielded an acceptable spatial and temporal resolution for dynamic MR imaging.
    MeSH term(s) Adult ; Algorithms ; Female ; Humans ; Image Enhancement/methods ; Image Interpretation, Computer-Assisted/methods ; Magnetic Resonance Imaging/methods ; Male ; Reproducibility of Results ; Sensitivity and Specificity ; Temporomandibular Joint/pathology ; Temporomandibular Joint Disorders/pathology
    Language English
    Publishing date 2011-10-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 603808-6
    ISSN 1936-959X ; 0195-6108
    ISSN (online) 1936-959X
    ISSN 0195-6108
    DOI 10.3174/ajnr.A2734
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Imaging of the temporomandibular joint.

    Katzberg, R W

    Current opinion in dentistry

    1991  Volume 1, Issue 4, Page(s) 476–479

    Abstract: Imaging of the temporomandibular joint recently has been characterized by a shift in emphasis from plain films, arthrography, and computed tomography toward magnetic resonance imaging. The past year represents the continuation of the era of refinement in ...

    Abstract Imaging of the temporomandibular joint recently has been characterized by a shift in emphasis from plain films, arthrography, and computed tomography toward magnetic resonance imaging. The past year represents the continuation of the era of refinement in magnetic resonance technology not immediately obvious as an advantage for temporomandibular joint imaging but nonetheless, of potential significant impact. A few examples of relatively "quiet" developments include: 1) new alloys for lighter weight permanent magnets with reduced operating costs; 2) gradient coil technology for more rapid image acquisition leading to the possibility of true cine magnetic resonance; and 3) smaller, more powerful computers for more rapid data processing. The implications are for comprehensive anatomic and physiologic assessments of the joint along with increased patient throughput and reduced costs. This review surveys the recent literature on the techniques and selection of imaging modalities, new observations regarding the pathophysiology of temporomandibular joint diseases afforded by advances in imaging technology, and my opinions regarding future directions in imaging technology based on my own experience and a review of the current literature.
    MeSH term(s) Arthrography ; Humans ; Magnetic Resonance Imaging ; Temporomandibular Joint/anatomy & histology ; Temporomandibular Joint Disorders/diagnosis ; Temporomandibular Joint Disorders/diagnostic imaging ; Tomography, X-Ray Computed
    Language English
    Publishing date 1991-08
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1066446-4
    ISSN 1046-0764
    ISSN 1046-0764
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Temporomandibular joint imaging.

    Katzberg, R W

    Anesthesia progress

    1990  Volume 37, Issue 2-3, Page(s) 121–126

    MeSH term(s) Arthrography ; Humans ; Magnetic Resonance Imaging ; Temporomandibular Joint/diagnostic imaging ; Temporomandibular Joint Disorders/diagnosis ; Temporomandibular Joint Disorders/diagnostic imaging ; Tomography ; Tomography, X-Ray Computed
    Language English
    Publishing date 1990-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 603800-1
    ISSN 1878-7177 ; 0003-3006
    ISSN (online) 1878-7177
    ISSN 0003-3006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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