Publications by authors named "Nicholas H Chia"

Article Synopsis
  • The study investigates the effectiveness of testing cerebrospinal fluid (CSF) for myelin oligodendrocyte glycoprotein antibodies (MOG-IgG) to help diagnose certain neurological conditions, specifically MOG antibody-associated disease (MOGAD).
  • Researchers analyzed data from multiple patients over 27 years, highlighting the sensitivity (90%) and specificity (98%) of the testing method used.
  • Results show that CSF MOG-IgG testing is beneficial, especially for patients with negative serum tests or low positive serum MOG-IgG, suggesting it should be used in the right clinical situations for accurate diagnosis.
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Objective: Seizures are a common manifestation of paraneoplastic neurologic syndromes. The objective of this study was to describe the seizure characteristics and outcomes in patients with high-risk paraneoplastic autoantibodies (>70% cancer association) and to determine factors associated with ongoing seizures.

Methods: Patients from 2000 to 2020 with seizures and high-risk paraneoplastic autoantibodies were retrospectively identified.

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Background: Magnetic resonance imaging (MRI) T2-lesions resolve more often in myelin oligodendrocyte glycoprotein (MOG) antibody-associated disease (MOGAD) than aquaporin-4 IgG-positive neuromyelitis optica spectrum disorder (AQP4 + NMOSD) and multiple sclerosis (MS) in adults but few studies analyzed children.

Objective: The main objective of this study is to investigate MRI T2-lesion evolution in pediatric MOGAD, AQP4 + NMOSD, and MS.

Methods: Inclusion criteria were as follows: (1) first clinical attack; (2) abnormal MRI (⩽6 weeks); (3) follow-up MRI beyond 6 months without relapses in that region; and (4) age < 18 years.

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Background: Stiff person spectrum disorder (SPSD) is heterogeneous, and accurate diagnosis can be challenging.

Methods: Patients referred for diagnosis/suspicion of SPSD at the Mayo Autoimmune Neurology Clinic from July 01, 2016, to June 30, 2021, were retrospectively identified. SPSD diagnosis was defined as clinical SPSD manifestations confirmed by an autoimmune neurologist and seropositivity for high-titer GAD65-IgG (>20.

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Background: Data on corpus callosum involvement in myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD) are limited.

Objective: The objective of the study was to compare callosal lesions in MOGAD, multiple sclerosis (MS), and aquaporin-4-IgG positive neuromyelitis optica spectrum disorder (AQP4+NMOSD).

Results: Callosal lesion frequency was similar in MOGAD (38/171 (22%)), MS (24/72 (33%)), and AQP4+NMOSD (18/63 (29%)).

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Background And Purpose: Endovascular thrombectomy (ET) is standard-of-care for ischemic stroke patients with large vessel occlusion, but estimates of potentially eligible patients from population-based studies have not been published. Such data are urgently needed to rationally plan hyperacute services. Retrospective analysis determined the incidence of ET-eligible ischemic strokes in a comprehensive population-based stroke study (Adelaide, Australia 2009-2010).

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Background: Both ageing and hypertension are known risk factors for atrial fibrillation (AF) although the pathophysiological contribution or interaction of the individual factors remains poorly understood. Here we aim to delineate the arrhythmogenic atrial substrate in mature spontaneously hypertensive rats (SHR).

Methods: SHR were studied at 12 and 15 months of age (n = 8 per group) together with equal numbers of age-matched normotensive Wistar-Kyoto control rats (WKY).

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Background: Carto-Sound integrates 2D intra-cardiac ultrasound imaging into a 3D environment to allow left atrial mapping from the right atrium without fluoroscopic assistance. We conducted an open randomized controlled study to compare procedural, clinical and accuracy parameters between CT integrated Carto-Sound and electro-anatomic mapping (EAM) for AF ablation.

Methods: Sixty index AF ablation patients were randomized equally to either the Carto-Sound or EAM mapping/navigation for their procedure performed at a single institution.

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Although conferences are important vehicles for discussing scientific findings, the translation of presented research into peer-reviewed manuscripts is a crucial subsequent step in the research process. Given the evolving subspecialization of cardiology, we sought to characterize the temporal and comparative outcomes of abstracts presented at a subspecialty cardiac electrophysiology conference. Abstracts presented at the Heart Rhythm Society conference (1994 through 2006; HRS abstracts) and abstracts presented at the American Heart Association conference (2003; AHA abstracts) were studied.

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