Hamilton Health Sciences
Centre for Healthy Aging

Meet our doctors

At St. Peter's Hospital, our doctors take the extra steps to make your visit as comfortable as possible. Here are a few of the friendly faces you may meet during your visit.



Dr. Brian Misiaszek

Brian Misiaszek is an Associate Professor and Clinical Educator in the Department of Medicine in the Division of Geriatric Medicine at McMaster University.  He completed his MD at the University of Western Ontario in 1997 and his residency training in Geriatric Medicine at McMaster University in 2001. 

He is currently the Chief of Service for Geriatrics at Hamilton Health Sciences.   Dr. Misiaszek has a Geriatric Medicine clinic at St. Peter’s Hospital twice weekly, part of which includes Outreach home visits. He also provides in-patient consults at Hamilton Health Sciences hospital sites, as well as providing regular coverage for the Geriatric Rehab Unit (GRU) located at the Juravinski Hospital site.  

His research interests includes dementia, drugs in the elderly, and he is an internationally recognized expert on extreme hoarding in seniors (i.e. Diogenes Syndrome).  He has also written and distributes free of charge via the Geriatric Division’s web page his popular 160 page Geriatric Medicine Survival Guide,  an educational resource used by both local and international medical learners.





Dr. Alexandra Papaioannou

Dr. Papaioannou is a Professor in the Department of Medicine and a Geriatrician at Hamilton Health Sciences.  She holds a Canadian Institute of Health Research – Eli Lilly Chair in Osteoporosis and Fracture Prevention. She is past Director, Division of Geriatric Medicine, McMaster University with joint appointment in the Division of Rheumatology, and Associate Member in the Department of Clinical Epidemiology and Biostatistics and Medical Sciences. 

She is a member of the Scientific Advisors of Osteoporosis Canada and the International Osteoporosis Foundation.  Dr Papaioannou was lead author of the Osteoporosis Canada Guidelines published in the October 2010 issue of Canadian Medical Association Journal. 

Dr. Papaioannou is past Chair of the Scientific Advisory Council of Osteoporosis Canada and the former Chair of the Board.  She is the project lead for the Ontario Osteoporosis Strategy for Fracture Prevention in Long-term Care, Co-Director of the Hamilton Canadian Multi-Centre Osteoporosis Study (CaMos), and leading the Fracture Think Osteoporosis project, a chronic disease management program in Hamilton, Ontario.





Dr. Sharon Marr

Dr. Sharon Marr is the new Chair of the Regional Geriatric Program central (RGPc). Dr. Marr is an Associate Professor, Division of Geriatric Medicine, and Department of Medicine and is also the Chair of the Division of Geriatric Medicine. Sharon has many educational accomplishments and responsibilities.

Sharon has a background in occupational therapy before obtaining her MD and internal/geriatric medicine residency training from McMaster University. She also holds a M.Ed degree from the University of Toronto (OISE/UT). Her primary academic activities include teaching, education and administration at all levels from medical school through to residency.






Dr. Tricia Woo

Tricia Woo attended medical school at the University of Toronto and also undertook fellowship training.   It was here that she completed her training in Geriatric Medicine.  She is currently an Associate Professor and Geriatrician for McMaster University at St. Peter’s Hospital.

Tricia has a keen interest in interprofessional education and increasing the profile of Geriatric medicine to medical students in Canada.









Dr. Chris Patterson   

Dr. Christopher Patterson is one of Canada’s most senior specialists in Geriatric Medicine. He has been on staff at Hamilton Health Sciences or its predecessor hospitals since 1981. He is a visiting consultant at Greater Niagara General Hospital, West Lincoln Memorial Hospital in Grimsby, and Grandview Lodge in Dunnville, as well as several hospitals in northern Ontario and Family Health Teams in the Hamilton area.

He is a Professor of Medicine at McMaster University, and teacher in the Michael DeGroote School of Medicine. Having served on the Canadian Task Force on Preventive Health Care, and on each of the four Canadian Consensus Conferences on Dementia, he has wide experience in developing Clinical Practice Guidelines for physicians. He is an investigator in the Canadian Longitudinal Study on Aging, and has authored or contributed to more than 150 scientific publications. He recently completed his term as Health Sciences Editor for the Canadian Journal on Aging, and has also served on the editorial boards of several national publications on pharmacology.






Dr. John Paulseth








Dr. Ryan A. Williams

Dr. Ryan A. Williams is an assistant clinical professor of medicine at McMaster University with a special interest in spasticity management. Dr. Williams will be joining the spasticity management clinic at the Regional Rehabilitation Centre as a new faculty member in the division of Physical Medicine and Rehabilitation.

His other areas of clinical interest include Spinal Cord Injury, electrodiagnostics, orthoses and musculoskeletal medicine, in particular, sports medicine. He is currently one of the team physicians for the Hamilton Tiger-Cats Football Club and, has also worked with the Toronto Rock and the Hamilton Bulldogs over the last few years.

Dr. Williams is a member of the Canadian Association of Physical Medicine and Rehabilitation, the Canadian Academy of Sport Medicine, the American Academy of Physical Medicine and Rehabilitation and the American Association of Neuromuscular and Electrodiagnostic Medicine.

Dr. A. S. Luthra


Hamilton Health Sciences • Hamilton, Ontario • 905.521.2100

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