Richard Choi

ORCID: 0000-0003-4221-9783
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About
Contact & Profiles
Research Areas
  • Antiplatelet Therapy and Cardiovascular Diseases
  • Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Dental Anxiety and Anesthesia Techniques
  • Cerebrovascular and Carotid Artery Diseases
  • Cardiac Structural Anomalies and Repair
  • Venous Thromboembolism Diagnosis and Management
  • Intracranial Aneurysms: Treatment and Complications
  • Anesthesia and Sedative Agents
  • Orthopedic Surgery and Rehabilitation
  • Acute Myocardial Infarction Research
  • Shoulder Injury and Treatment
  • Pharmacovigilance and Adverse Drug Reactions
  • Central Venous Catheters and Hemodialysis
  • Elbow and Forearm Trauma Treatment
  • Cardiomyopathy and Myosin Studies
  • Neurosurgical Procedures and Complications
  • Alcoholism and Thiamine Deficiency
  • Fatty Acid Research and Health
  • Hemoglobinopathies and Related Disorders
  • Kawasaki Disease and Coronary Complications
  • Aortic Disease and Treatment Approaches
  • Vascular Procedures and Complications
  • Iron Metabolism and Disorders
  • Intracerebral and Subarachnoid Hemorrhage Research
  • Lung Cancer Research Studies

Johns Hopkins Hospital
2025

Institute for Christian Studies
2025

Christiana Care Health System
2024-2025

Riverside Clinical Research
2021

Unity Health Toronto
2021

St Joseph's Health Centre
2014-2021

University of Toronto
2005-2021

James Cook University
2018

Hospital of the University of Pennsylvania
2014

Rhode Island Hospital
2011

Shadi Yaghi Liqi Shu Daniel Mandel Christopher R. Leon Guerrero Nils Henninger and 95 more Jayachandra Muppa Muhammad Affan Omair ul haq Lodhi Mirjam R. Heldner Kateryna Antonenko David Seiffge Marcel Arnold Setareh Salehi Omran Ross Crandall Evan Lester Diego Lopez Mena Antonio Araúz Ahmad Nehme Marion Boulanger Emmanuel Touzé João André Sousa João Sargento‐Freitas Vasco Barata Paulo Castro‐Chaves Maria Teresa Brito Muhib Khan Dania Mallick Aaron Rothstein Ossama Khazaal Josefin Emelie Kaufmann Stefan T. Engelter Christopher Traenka Diana Aguiar de Sousa Mafalda Soares Sara Rosa Lily Zhou Preet Gandhi Thalia S. Field Steven Mancini Issa Metanis Ronen R. Leker Kelly Pan Vishnu Dantu Karl Baumgartner Tina Burton Regina von Rennenberg Christian H. Nolte Richard Choi Jason B. MacDonald Reza Bavarsad Shahripour Xiaofan Guo Malik Ghannam Mohammad Almajali Edgar A. Samaniego Sebastian Sanchez Bastien Rioux Fayçal Zine-Eddine Alexandre Y. Poppe Ana Catarina Fonseca Maria Fortuna Baptista Diana Cruz Michele Romoli Giovanna De Marco Marco Longoni Zafer Keser Kim Griffin Lindsey Kuohn Jennifer Frontera Jordan Amar James Giles Marialuisa Zedde Rosario Pascarella Ilaria Grisendi Hipólito Nzwalo David S. Liebeskind Amir Molaie Annie Cavalier Wayneho Kam Brian Mac Grory Sami Al Kasab Mohammad Anadani Kimberly Kicielinski Ali Eltatawy Lina Chervak Roberto Chulluncuy‐Rivas Yasmin Aziz Ekaterina Bakradze Thanh Lam Tran Marc Rodrigo‐Gisbert Manuel Requena Faddi Saleh Velez Jorge Ortiz Gracia Varsha Mudassani Adam de Havenon Venugopalan Y. Vishnu Sridhara Yaddanapudi L Adams Abigail Browngoehl Tamra Ranasinghe Randy Dunston

Small, randomized trials of patients with cervical artery dissection showed conflicting results regarding optimal stroke prevention strategies. We aimed to compare outcomes in treated antiplatelets versus anticoagulation.

10.1161/strokeaha.123.045731 article EN PubMed 2024-04-01

Surgical myectomy has been the standard treatment for patients with drug-refractory obstructive hypertrophic cardiomyopathy. The clinical and echocardiographic predictors of long-term survival freedom from cardiovascular morbidity after have unclear.We studied a consecutive cohort 338 adult (age at operation 47+/-14 [range 18 to 77] years, 60% male) who underwent our institution. Preoperative resting left ventricular outflow tract (LVOT) gradient was 66+/-32 mm Hg (range 5 158 Hg). Early...

10.1161/01.cir.0000162460.36735.71 article EN Circulation 2005-04-12

This study investigated the expectations and experiences of a sample new patients visiting an Australian regional university Student Dental Clinic with regard to anxiety provoking alleviating stimuli in clinical environment. Differences levels were examined by age, gender type procedure undergone. The number dental who participated was 102 (56 males, 43 females). used pre-treatment/post-treatment design assess effect on patients. Modified Anxiety Scale (MDAS) measure at pre-treatment....

10.1186/s12903-018-0507-5 article EN cc-by BMC Oral Health 2018-03-20

Introduction: Cervical artery dissection (CAD) accounts for nearly 2% of all ischemic strokes but up to 25% in young adults. Dissection is likely precipitated by the interplay between risk factors (migraine, low body mass index), environmental triggers (cervical trauma or infection), and genetic connective tissue abnormalities (e.g. Ehlers-Danlos Marfan’s disease). In this study, we delineate prevalence a multicenter cohort cervical dissection. Methods: This post-hoc analysis Antithrombotic...

10.1161/str.56.suppl_1.tp221 article EN Stroke 2025-01-30

The coronavirus disease 2019 (COVID-19) pandemic remains a source of considerable morbidity and mortality throughout the world. Therapeutic options to reduce symptoms, inflammatory response, or progression are limited. This randomized open-label trial enrolled 100 ambulatory patients with symptomatic COVID-19 in Toronto, Canada. Results indicate that icosapent ethyl (8 g daily for 3 days followed by 4 11 days) significantly reduced high-sensitivity C-reactive protein (hs-CRP) improved...

10.1016/j.isci.2021.103040 article EN cc-by iScience 2021-08-26

: Carcinoid heart disease is characterized by pulmonic and/or tricuspid valvular dysfunction and the most common cardiac manifestation of carcinoid syndrome. We present an unusual a rare entity metastasis to heart, without disease. This case in interventricular septum illustrates utility MRI delineating extent tissue characteristics tumour, its complementary role nuclear scan.

10.2459/jcm.0000000000000054 article EN Journal of Cardiovascular Medicine 2014-07-10

Background Although acetylsalicylic acid is the most commonly used antithrombotic agent for secondary prevention of cardiovascular events, residual atherothrombotic risk has prompted a guideline recommendation addition dual antiplatelet therapy (DAPT) or pathway inhibition (DPI) in high vascular patients. Accordingly, CONNECT CVD quality enhancement initiative provides contemporary "snapshot" clinical features and management atherosclerotic disease (ASCVD) patients Canada. Methods Canadian...

10.1111/ijcp.14597 article EN International Journal of Clinical Practice 2021-07-06

OBJECTIVE: To determine whether pre-injury antiplatelet agent use is associated with progression of hemorrhagic injury (PHI) or mortality after severe TBI. BACKGROUND: The effects agents on coagulation pathways in traumatic brain are not well understood, but available data suggest that their increases the risk an unfavorable outcome. DESIGN/METHODS: Patients TBI who underwent intracranial pressure and oxygen monitoring between 1/2006 12/2009 were retrospectively identified from Brain Oxygen...

10.1212/wnl.82.10_supplement.p5.330 article EN Neurology 2014-04-08

Purpose: We have reported that VC is a very sensitive modality in identifying colonic polyps when 2 expert radiologists interpret the studies (sensitivity 88.7%, Pickhardt et al, NEJM 2003; 349). questioned whether could be trained utilizing standard 1 week course to maintain similar degree of accuracy non-protocol setting. Methods: 9 staff underwent an intensive (100 interpretations prior independant reading). These then prospectively interpreted 1647 VC's (7/2003-12/2005) performed...

10.14309/00000434-200609001-00492 article EN The American Journal of Gastroenterology 2006-09-01
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