Dr. Darcy Marciniuk MD, FRCPC

Darcy D. Marciniuk, MD, FRCPC, FCAHS, Master FCCP, FAEM is a Professor of Respirology and Sleep Medicine at the University of Saskatchewan, Saskatoon, Sask., Canada. Dr. Marciniuk is also the Medical Director of the LiveWell COPD Chronic Disease Management Program and co-Lead of the COPD Provincial Clinical Network (PCN) in the Saskatchewan Health Authority (SHA).

Dr. Marciniuk received his Doctor of Medicine from the University of Saskatchewan and underwent specialty training in internal medicine and respiratory medicine at the University of Western Ontario and at the University of Manitoba. He undertook research training at the University of Manitoba under the mentorship of Drs. Magdy Younes and Steven Mink. Upon completing his research training, Dr. Marciniuk returned to Saskatoon where he assumed his current faculty position.

Dr. Marciniuk is recognized internationally as an expert and leader in clinical exercise physiology, Chronic Obstructive Pulmonary Disease (COPD), and pulmonary rehabilitation with 520 invited international presentations and 300 peer-reviewed publications, chapters, and reviews (Google Scholar h-index 67). Dr. Marciniuk is a past-President of the American College of Chest Physicians (2012-2013) and the Canadian Thoracic Society (2006-2007) and past-Chair of the Forum of International Respiratory Societies. He served as a founding Steering Committee member of Canada’s National Lung Health Framework (2007-2011), and co-chaired the 2016 CHEST World Congress in Shanghai, China. Dr. Marciniuk was the lead author of three COPD practice guidelines published by the CTS, a panel member of international practice guidelines in COPD (ACP/ACCP/ATS/ERS), cardiopulmonary exercise testing (ATS/ACCP), pulmonary rehabilitation (ATS/ERS), and prevention of acute exacerbations of COPD (CTS/CHEST), as well as many clinical practice guidelines for the management of COPD published by the CTS. Darcy recently chaired a multi-society international guideline on race and pulmonary function testing and served as co-chair for a Canadian Thoracic Society Alpha-1-Antitrypsin replacement therapy clinical practice guideline.

Dr. Marciniuk is a Fellow of the Canadian Academy of Health Sciences and Master Fellow of the American College of Chest Physicians. He has been bestowed with the Distinguished Scientist Honor Lecture (2011), the Thomas L. Petty Master FCCP Memorial Honor Lecture (2015), and the Presidential Honor Lecture (2020) by the American College of Chest Physicians; the Founder’s Award (2013) by the Canadian Lung Association; the Christie Memorial Lecture and Award (2016) by the Canadian Thoracic Society; and the Distinguished Researcher Award (2013) by the College of Medicine, University of Saskatchewan.

Medical School and Year of Graduation:

University of Saskatchewan

1984

Postgraduate Training and Years of Training:

Rotating Internship (Chief Intern), St. Paul's Hospital, Saskatoon, Saskatchewan	1984 - 1985
Internal Medicine, University of Western Ontario, London, Ontario	1985 - 1987
Internal Medicine, University of Manitoba, Winnipeg, Manitoba	1987 - 1988
Respirology Fellowship, University of Manitoba, Winnipeg, Manitoba	1988 - 1990

Current Academic Post and Year of Appointment to the University of Saskatchewan:

Associate Vice President Research    Associate Vice President Research (Acting), Research and International	2017 - 2026   2015 - 2017
Professor of Medicine, University of Saskatchewan	1999 - present
Faculty at University of Saskatchewan	1990 - present

• Yusup I, Tang R, Kouri A, Sin DD, Marciniuk DD, Gupta S. COPD Action Plans: Gaps in Development Methods, Content, and Format. Int J COPD 2026, 21:1-14. doi:https://doi.org/10.2147/COPD.S571223. 
• Morse CJ, Luchkanych AMS, Boyes NG, Champagne AA, Nelson MD, Karjala G, Zhai A, Haddad H, Marciniuk DD, Kell ME, Tomczak CR, Olver TD. Cerebral hemodynamics are related to cortical brain morphology in heart failure with reduced ejection fraction independent of reduced cardiac output. CJC Open 2025; 8(4):396-399. doi: 10.1016/j.cjco.2025.12.011.
• Biswas S, Doiron D, Li PZ, Aaron SD, Chapman K, Hernandez P, Maltais F, Marciniuk DD, O’Donnell D, Sin DD, Walker B, Nadeau G, Compton C, Tan WC, Bourbeau J. Clinically important deterioration in a mild–moderate COPD population. ERJ Open Res 2025; 11: 01172-2024. doi:10.1183/23120541.01172-2024.
• Collins SE, Jensen D, Kirby M, Phillips DB, Molgat-Seon Y, Marciniuk DD, Walker BL, Aaron SD, Hernandez P, Tan WC, Bourbeau J, Smith BM. Smaller airways or bigger lungs? Dysanapsis etiotypes and obstructive pulmonary physiology at rest and during exercise". Am J Resp Crit Care Med 2025; 211(8):1519-1522. doi:10.1164/rccm.202501-0205RL.
• Mikaeeli S, Doiron D, Bourbeau J, Li PZ, Aaron SD, Chapman KR, Hernandez P, Maltais F, Marciniuk DD, O’Donnell DE, Sin DD, Walker BL, Tan WC, Rousseau S, Ross BA, on behalf of the CanCOLD Collaborative Research Group and the Canadian Respiratory Research Network. COPD Exacerbations, Air Pollutant Fluctuations, and Individual-Level Factors in the Pandemic Era. Int J COPD 2025; 20:735-751.
• Morse C, Luchkanych A, Boyes N. Champagne A, Kelly M, Nelson M, Marshall R, Karjala G, Zhai A, Haddad H, Marciniuk D, Tomczak C, Olver DT. Cardiac dysfunction is associated with indices of brain atrophy and cognitive impairment in heart failure with reduced ejection fraction. Journal of Applied Physiology 2025; 138(4):1024-1033. doi:10.1152/japplphysiol.00840.2024.
• Jurissen T, Luchkanych A, Boyes N, Marshall R, Khan MR, Zhai A, Haddad H, Marciniuk D, Tomczak C, Olver TD. Cerebrovascular responses to muscle metaboreflex activation in patients living with heart failure with reduced ejection fraction. Journal of Applied Physiology 2025; 138(4):891-898. doi:10.1152/japplphysiol.00834.2024.
• Gale CP, Hurst JR, Hawkins NM, Bourbeau J, Han MK, Lam CSP, Marciniuk DD, Price D, Stolz D, Gluckman T, Zieroth S, Nadarajah R, Young RY, Singh D, Martinez FJ, Berg DD, Bhutani M, the Global Working Group on Cardiopulmonary Risk. Identification and management of cardiopulmonary risk in patients with COPD: a multidisciplinary consensus and modified Delphi study. European Journal of Preventive Cardiology 2025; 32(15):1445-1460. doi:10.1093/eurjpc/zwaf119.
• Beydoun S, Iorio O, Genkin D, Li ,P, Doiron D, Maltais F, Bourbeau J, Tan W, Sin D, Aaron S, Chapman K, Hernandez P, Marciniuk D, O'Donnell D, Walker B, Kirby M, Ross B. Utility of Diaphragm Dome Height as a Marker of Operational Lung Volume Changes, Disease Burden and Exacerbations in Patients with Mild-to-Moderate COPD: An Observational Study Within the CanCOLD Cohort. ERJ Open Research 2025; 11(3):01042-2024. doi:10.1183/23120541.01042-2024.
• Hernandez P, Bossé Y, Bush P, Chapman KR, Maltais F, Penz ED, Walker BL, Lal A, Marciniuk DD. Alpha-1-Antitrypsin Deficiency Targeted Testing and Augmentation Therapy: A Canadian Thoracic Society Meta-analysis and Clinical Practice Guideline. CHEST 2025; 167(4):1044-1063. doi:10.1016/j.chest.2024.08.037.
• Ekström M, Lewthwaite H, Li PZ, Bourbeau J, Tan WC, Jensen D, FitzGerald JM, Sin DD, Marciniuk DD, O’Donnell DE, Hernandez P, Chapman KR, WalkerB, Aaron SA, Maltais F. Identifying Abnormal Exertional Breathlessness in COPD: Comparing Modified Medical Research Council and COPD Assessment Test with Cardiopulmonary Exercise Testing. CHEST 2025; 167(3):697-711. doi:10.1016/j.chest.2024.10.027.