Steven G Villaraza

ORCID: 0000-0001-8412-5211
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About
Contact & Profiles
Research Areas
  • Dementia and Cognitive Impairment Research
  • Alzheimer's disease research and treatments
  • Cerebrospinal fluid and hydrocephalus
  • Cholinesterase and Neurodegenerative Diseases
  • Cerebrovascular and Carotid Artery Diseases
  • Hereditary Neurological Disorders
  • Blood Pressure and Hypertension Studies
  • Spinal Dysraphism and Malformations
  • Peripheral Neuropathies and Disorders
  • Neurological Disorders and Treatments
  • Intramuscular injections and effects
  • Frailty in Older Adults
  • Spinal Cord Injury Research
  • Circadian rhythm and melatonin
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Health and Wellbeing Research
  • Intracerebral and Subarachnoid Hemorrhage Research
  • Neurosurgical Procedures and Complications
  • Health Systems, Economic Evaluations, Quality of Life
  • Cognitive Functions and Memory
  • Toxoplasma gondii Research Studies
  • Bacterial Infections and Vaccines
  • Pneumocystis jirovecii pneumonia detection and treatment
  • Acute Ischemic Stroke Management
  • Sleep and related disorders

José R. Reyes Memorial Medical Center
2023-2025

National University Health System
2019-2024

National University Hospital
2020-2024

National University of Singapore
2019-2024

Memorial Medical Center
2022

Erasmus MC
2020

Amsterdam UMC Location Vrije Universiteit Amsterdam
2020

National Hospital for Neurology and Neurosurgery
2019

University College London
2019

Katsushika Medical Center
2019

To evaluate the association between brain amyloid β (Aβ) and cerebral small vessel disease (CSVD) markers, as well their joint effect on cognition, in a memory clinic study.A total of 186 individuals visiting clinic, diagnosed with no cognitive impairment, impairment dementia (CIND), Alzheimer (AD), or vascular were included. Brain Aβ was measured by [11C] Pittsburgh compound B-PET global standardized uptake value ratio (SUVR). CSVD markers including white matter hyperintensities (WMH),...

10.1212/wnl.0000000000011029 article EN Neurology 2020-10-13

Hemorrhagic pyogenic cerebral abscesses are a rare clinical entity that can present diagnostic challenges and lead to treatment delays. We report case of 46-year-old female who initially presented with sudden onset focal neurological deficits, raising suspicion cerebrovascular etiology. Further workup revealed hemorrhagic brain abscess. The patient was managed successfully conservative approach, receiving medical after declining surgical intervention, discharged only minimal residuals....

10.7759/cureus.82744 article EN Cureus 2025-04-21

There are major challenges in determining the etiology of vascular cognitive impairment (VCI) clinically, especially presence mixed pathologies, such as and amyloid. Most recently, two criteria (American Heart Association/American Stroke Association (AHA/ASA) Diagnostic Statistical Manual Mental Disorders, Fifth Edition (DSM-V)) have been proposed for clinical diagnosis VCI but not yet validated using neuroimaging.

10.1177/17474930241252556 article EN International Journal of Stroke 2024-04-23

Various blood biomarkers reflecting brain amyloid-β (Aβ) load have recently been proposed with promising results. However, to date, no comparative study amongst has reported. Our objective was examine the diagnostic performance and cost effectiveness of three on same cohort.Using cohort (n = 68), performances single-molecule array (Simoa) Aβ40, Aβ42, Aβ42/Aβ40 amplified plasmonic exosome (APEX) Aβ42 were compared using amyloid positron emission tomography (PET) as reference standard. The...

10.1111/ene.14704 article EN European Journal of Neurology 2020-12-28

Abstract Hypertension is a global public health challenge that imposes significant burden on patients and healthcare systems. Conventional treatment involves dose escalation of an antihypertensive drug, if the desired response not achieved, are prescribed another often in combination with other therapies. Importantly, drug synergy dose‐, time‐ patient‐dependent. Coupled challenges intra‐ inter‐individual variability, standard care can lead to sub‐optimal outcomes, additional visits,...

10.1002/adtp.202100091 article EN Advanced Therapeutics 2021-07-22

Abstract Background The underlying cause of cognitive decline in individuals who are positive for biomarkers neurodegeneration (N) but negative amyloid‐beta (A), designated as Suspected non‐Alzheimer's pathophysiology (SNAP), remains unclear. We evaluate whether cerebrovascular disease (CeVD) is more prevalent those with SNAP compared to A−N− and A+N+ CeVD associated over time patients. Methods A total 216 from a prospective memory clinic cohort (mean [SD] age, 72.7 [7.3] years, 100 women...

10.1111/ene.15337 article EN European Journal of Neurology 2022-03-27

Background: P-wave terminal force in lead V1 (PTFV1) on electrocardiography has been associated with atrial fibrillation and ischemic stroke. Objective: To investigate whether PTFV1 is cerebral small vessel disease (CSVD) markers etiological subtypes of cognitive impairment dementia. Methods: Participants were recruited from ongoing memory clinic study between August 2010 to January 2019. All participants underwent physical medical evaluation along an 3 T brain magnetic resonance imaging....

10.3233/jad-215413 article EN Journal of Alzheimer s Disease 2022-02-15

Bilateral scapular winging is a rare and atypical manifestation of Arnold-Chiari malformation type 1 (ACM1). We report case ACM with extensive syrinx formation, presenting progressive bilateral proximal upper extremity weakness, winging, segmental hypesthesia reduced thermesthesia over the C2-C8 dermatomal levels. The patient was successfully treated surgical decompression syringosubarachnoid shunting. This unusual presentation ACM1 emphasizes need to consider central nervous system...

10.7759/cureus.76330 article EN Cureus 2024-12-24

We describe a 24-year old man diagnosed with Down syndrome who developed intracranial germinona located at the pineal region presented no ophthalmologic signs on neurologic examination admission. However, after external ventricular device (EVD) insertion, patient upward gaze palsy and convergence retraction nystagmus.

10.54029/2023ufj article EN Deleted Journal 2023-06-01

Background: Decompressive hemicraniectomy (DHC) is a surgical procedure in which substantial piece of the cranium removed to reduce intracranial pressure. DHC improves mortality. Although may be lifesaving, many survivors suffer from severe neurological impairment, patients and primary caregivers have deal with afterward. This study’s purpose understand better caregiver’s perception regarding burden outcome DHC. Methods: was descriptive, prospective study that included all who had previously...

10.54029/2023mii article EN Deleted Journal 2023-09-01
Sara Torres‐Castro Rube ́n Rabaneda-Bueno Mariana Lo ́pez-Ortega Miguel Gutie ́rrez-Robledo Azucena Guzma ́n and 95 more Rebecca S. Boxer Mary A. Dolansky Erin L. Chaussee Jon Campbell Andrea E. Daddato Robert L. Page Diane L. Fairclough Stefan Gravenstein Himali Weerahandi John A. Dodson Eun-Lee Lee Myoung-Hwan Ko Myung-Jun Shin Byeong-Ju Lee Da Jung Kap-Soo Han Jin Kim Christopher Chen Qingshu Lu Babu Moorakonda Nagaendran Kandiah Y.H. Tan Steven G Villaraza Jemelle Cano Narayanaswamy Venketasubramanian Jeanine J.S. Rutten Laura van Buul Martin Smalbrugge Suzanne E. Geerlings Debby L. Gerritsen Stephanie Natsch Philip D. Sloane Johannes C. van der Wouden Jos W. R. Twisk Cees M.P.M. Hertogh Patience Moyo Lacey Loomer Joan M. Teno Roee Gutman Ellen McCreedy Angelo E. Volandes Susan L. Mitchell Vincent Mor Laura Calcaterra Matteo Cesari Wee Chian Lim Kanneganti Abhiram Benjamin Tan Melanie Tan Lifeng Tan Ching-Hui Sia Ying Xian Chua Lucas Lim Maleena Suppiah Kang Sim Yiong Huak Chan Shirley Ooi Mhpe Covid- Mauro Di Bari Francesco Tonarelli Daniela Balzi Antonella Giordano Andrea Ungar Samuele Baldasseroni Graziano Onder Maria Teresa Mechi Giulia Carreras Francesco Orso Andrea Herbst M Migliorini Camilla Ghiara S Virciglio Viola Camartini Silvia Tognelli Giulia Lucarelli Giacomo Fortini Alessandra Pratesi Niccolò Marchionni Francesco Fattirolli Lauren Mitchell Elizabeth Albers Robyn Birkeland Colleen Peterson Henry Stabler Brenna Horn Jinhee Cha Anna Drake Joseph E. Gaugler Adam H. Dyer Claire Noonan Matt McElheron Isabella Batten Conor Reddy Emma Connolly Rachel Pierpoint

10.1016/s1525-8610(22)00113-x article EN Journal of the American Medical Directors Association 2022-02-23

Guillain-Barré Syndrome (GBS) is a complex autoimmune disorder where person’s own immune system damages the nerve and usually characterized by ascending symmetrical weakness of upper lower extremities (Wijdicks & Klein, 2017). It rare condition worldwide frequency GBS only 2 in 100,000 adult individuals (McGrogan et al., 2009). Studies have shown its association with different vaccines but these pandemic times, there lack literature on post-COVID-19 vaccination-associated GBS. We report...

10.31014/aior.1994.05.03.237 article EN Journal of Health and Medical Sciences 2022-09-21

Guillain-Barré Syndrome (GBS) is a complex autoimmune disorder where person’s own immune system damages the nerve and usually characterized by ascending symmetrical weakness of upper lower extremities (Wijdicks & Klein, 2017). It rare condition worldwide frequency GBS only 2 in 100,000 adult individuals (McGrogan et al., 2009). Studies have shown its association with different vaccines but these pandemic times, there lack literature on post-COVID-19 vaccination-associated GBS. We...

10.31219/osf.io/zsvmf preprint EN 2022-09-21

Abstract BackgroundPreclinical and clinical studies indicate a role for MLC901 (NeuroAiD TM II) in Alzheimer’s Disease (AD). We investigated its safety efficacy as add-on therapy to standard treatment evaluated disease modifying effect mild moderate AD.MethodsMild-moderate probable AD patients by NINCDS-ADRDA criteria, stable on acetylcholinesterase inhibitors or memantine (n=125) were randomized receive (early starters) placebo (delayed 6 months, followed further months during which all...

10.21203/rs.3.rs-494674/v1 preprint EN cc-by Research Square (Research Square) 2021-05-11
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