Marlise dos Santos profile picture

Contact Information

Marlise dos Santos, MD (FRCPC), MSc, MPH

Clinical referrals to Fax: +1(613)761-4128

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Marlise dos Santos

Clinician Investigator, Clinical Epidemiology Program
Ottawa Hospital Research Institute
Associate Professor of Radiology, Department of Medical Imaging
University of Ottawa
Interventional Neuroradiologist, Department of Medical Imaging
The Ottawa Hospital
Diagnostic Neuroradiologist, Department of Medical Imaging
The Ottawa Hospital
Master of Public Health and Clinical Epidemiology, T.H. Chan School of Public Health
Harvard University
Master of Neurovascular Diseases
University of Paris - XI
Elected Delegate, District-8
Ontario Medical Association
FRCPC, Neuroradiology
Royal College of Physicians and Surgeons of Canada
FRCPC, Clinical Neurology
Royal College of Physicians and Surgeons of Canada
Active Member, CPSO Lincense Number 79928
College of Physicians and Surgeons of Ontario

Research Interests

Patient Safety and Quality Improvement

Patient Engagement

Public Health


Advanced Techniques in Vessel Wall Imaging

Neurovascular Anatomy

Head and Neck Diseases

Long-term Outcome in the Endovascular Treatment of Vascular Lesions


Brief Biography

Dr. Marlise Santos is an Associate Professor with the Department of Radiology at the University of Ottawa. She offers our community a decade of training in neurosciences, including six years of formal education in endovascular neurosurgery (or interventional neuroradiology) by the very best in her field with an International Masters Diploma in Neurovascular Diseases (2006).

Dr. Santos is a warm and respected physician member of the neuroradiology and neuro-interventional sections at The Ottawa Hospital. She has been the principal investigator for several studies endorsed by The Ottawa Hospital and Brain and Mind Research Institutes. She advocates for patient safety and excellence in clinical care and education. Dr. Santos received a Master of Public Health and Clinical Epidemiology from Harvard University (2018). She received the Best Radiology Teacher Award for the University of Ottawa, Faculty of Medicine Undergraduate Medical Education program (2012), The Ottawa Hospital's Patient Safety Star Award (2014), and the Neuroradiology Staff Teacher of the Year Award (2023).

Dr. Santos has nearly two decades of professional experience in neuroimaging and endovascular surgery at your disposal. She offers individualized and compassionate medical and professional support to those suffering from complex conditions such as acute stroke (brain clot aspiration), aneurysm, fistula, vascular malformations (catheter embolization, coiling, stenting, flow diversion, etc.); vessel stenosis (stenting, angioplasty); venous "angiomas" (sclerotherapy); vascular tumours (catheter embolization); to name a few. Dr. Santos' clinical neurology background and diagnostic neuroradiology skills allow her to provide integrated clinical care and expert support with the interpretation of MRI and CT scans. She strives to ensure you understand and feel involved in every step of your medical care. 

Dr. Santos and her Team are looking forward to assisting you! She accepts direct clinical referrals from your physicians
- by Fax (for all external / outpatients): (613)761-4128.
- by EPIC system - all outpatients or non-TOH inpatients: "Place Ambulatory Orders", "Add order", "Ambulatory referral to Interventional Neuro Radiology".
- by EPIC system - for all TOH in-patients: "Place Ambulatory Orders", "Add order", "IP Consult to Neuro Radiology".

Selected Publications

1. n 't Veld, M., Fronczek, R., dos Santos, M.P., Meijer, F. J.A., Willems, P.W.A. “High sensitivity and specificity of 4D-CTA in the detection of cranial arteriovenous shunts.”. Eur Radiol (2019) 29:5961–5970. 

2. Fitzpatrick, L.A., Berkovitz, N., dos Santos, M.P., Majeed, N., Glikstein, R., Chakraborty, S., Stotts, G., Veinot, J.P., Berthiaume, A., Chatelain, R.. "Vulnerable Carotid Plaque Imaging and Histopathology Without a Dedicated Receiver Coil". Neuroradiol J. 2017 Apr;30(2):120-128.

3. dos Santos, M.P., Sabri, A., Dowlatshahi, D., Bakkai, Ali M., Elallegy, A. "Survival Analysis of Risk Factors for Major recurrence of Intracranial Aneurysms after Coiling". Canadian Journal of Neurological Sciences. 2015;42:40-47.  

4. Ghinda, D., dos Santos, M.P., Sabri, A. "Clinical and Angiographic Outcomes of Stent-assisted Coiling of Intracranial Aneurysms". Interventional Neuroradiology. 2015 Apr;21(2):146-54.

5. dos Santos, M.P., Sabri, A.*, Dowlatshahi, D., Bakkai, Ali M.*, Elallegy, A.*, Lesiuk, H.J., Lum, C. "Survival Analysis of Risk Factors for Major recurrence of Intracranial Aneurysms after Coiling." Canadian Journal of Neurological Sciences. 2015;42:40-47. 

Diseases, conditions and populations of interest

Research and clinical approaches