Paul Dorian



Research Programs


Dr. Dorian received his medical degree from McGill University in Montreal in 1976.  He completed training in Internal Medicine, Clinical Pharmacology, and Cardiology at the University of Toronto and completed a Fellowship in Cardiac Electrophysiology at Stanford University.  He is a Professor of Medicine in the Division of Cardiology and in the Division of Clinical Pharmacology at the University of Toronto, and a Staff Scientist at the Li Ka Shing Knowledge Institute, and is Staff Cardiac Electrophysiologist at St. Michael’s Hospital.

Dr. Paul Dorian was the Department Director, Division of Cardiology, University of Toronto (2009-2019), and President of the Canadian Heart Rhythm Society (2013-2014).

He is a recipient of the University of Toronto Department of Medicine Research Award, and the Canadian Cardiovascular Society and Canadian Heart Rhythm Society Achievement Awards.

He has served and continues to serve on the steering committees of multiple multicenter clinical trials in arrhythmia care.

He was the principal investigator of the ALIVE RCT of antiarrhythmic drugs in cardiac arrest, the Family study on predicting and preventing sudden cardiac death, the CIHR funded EpiDOSE Trial, and the Program to reduce sudden death funded by the Canadian Arrhythmia Network.

He has led a basic science research program on the mechanisms of ventricular fibrillation, treatment of experimental cardiac arrest, and the circulatory and electrophysiology of cardio pulmonary resuscitation.

He has also been active in a research program on the establishment of optimum systems of care for patients with atrial fibrillation, including assessment of quality of life in patient reported outcomes.  He designed and led the implementation of scales to measure quality of life in AF, including the Canadian Cardiovascular Society Severity in Atrial Fibrillation (CCS-SAF) score, The AFSS scale, and the AFEQT scale, which are the most used methods for the measurement of quality of life in patients with AF.

He is one of the core participants of the University of Toronto Sports Cardiology Program which brings together academic researchers, academic and community cardiologists, physiology researchers, students, and patients in the establishment of a clinical and research program in sports cardiology.  He has led studies on the incidence and causes of sudden death in competitive sport, and the diagnostic accuracy of the ECG in athlete screening.

He has served on the CCS guidelines/position paper writing panel committee for atrial fibrillation, heart failure, ventricular arrhythmia, and athlete preparticipation screening.

He has published over 500 peer reviewed papers and is Associate Editor of the textbook Electrophysiological Disorders of the Heart.

Recent Publications

  1. Queenan, JA, Ehsani-Moghaddam, B, Wilton, SB, Dorian, P, Cox, JL, Skanes, A et al.. Detecting Patients With Nonvalvular Atrial Fibrillation and Atrial Flutter in the Canadian Primary Care Sentinel Surveillance Network: First Steps. CJC Open. 2021;3 (3):367-371. doi: 10.1016/j.cjco.2020.10.012. PubMed PMID:33778454 PubMed Central PMC7984971.
  2. Weissler Snir, A, Connelly, KA, Goodman, JM, Dorian, D, Dorian, P. Exercise in Hypertrophic Cardiomyopathy: Restrict or Rethink??. Am J Physiol Heart Circ Physiol. 2021; :. doi: 10.1152/ajpheart.00850.2020. PubMed PMID:33769918 .
  3. Vaillancourt, C, Charette, M, Naidoo, S, Taljaard, M, Church, M, Hodges, S et al.. Multi-centre implementation of an Educational program to improve the Cardiac Arrest diagnostic accuracy of ambulance Telecommunicators and survival outcomes for sudden cardiac arrest victims: the EduCATe study design and methodology. BMC Emerg Med. 2021;21 (1):26. doi: 10.1186/s12873-021-00416-4. PubMed PMID:33663395 PubMed Central PMC7931555.
  4. Fanous, Y, Dorian, P. CMAJ. 2021;193 (5):E197. doi: 10.1503/cmaj.201084-f. PubMed PMID:33526552 PubMed Central PMC7954570.
  5. Parkash, R, MacIntyre, C, Dorian, P. Predicting Sudden Cardiac Death After Myocardial Infarction: A Great Unsolved Challenge. Circ Arrhythm Electrophysiol. 2021;14 (1):e009422. doi: 10.1161/CIRCEP.120.009422. PubMed PMID:33464943 .
  6. Mody, P, Pandey, A, Slutsky, AS, Segar, MW, Kiss, A, Dorian, P et al.. Gender-Based Differences in Outcomes Among Resuscitated Patients With Out-of-Hospital Cardiac Arrest. Circulation. 2021;143 (7):641-649. doi: 10.1161/CIRCULATIONAHA.120.050427. PubMed PMID:33317326 .
  7. McKinney, J, Connelly, KA, Dorian, P, Fournier, A, Goodman, JM, Grubic, N et al.. COVID-19-Myocarditis and Return to Play: Reflections and Recommendations From a Canadian Working Group. Can J Cardiol. 2020; :. doi: 10.1016/j.cjca.2020.11.007. PubMed PMID:33248208 PubMed Central PMC7688421.
  8. Drennan, IR, Dorian, P, McLeod, S, Pinto, R, Scales, DC, Turner, L et al.. DOuble SEquential External Defibrillation for Refractory Ventricular Fibrillation (DOSE VF): study protocol for a randomized controlled trial. Trials. 2020;21 (1):977. doi: 10.1186/s13063-020-04904-z. PubMed PMID:33243277 PubMed Central PMC7689391.
  9. Fanous, Y, Dorian, P. Lifestyle modification for the management of atrial fibrillation. CMAJ. 2020;192 (46):E1469. doi: 10.1503/cmaj.201084. PubMed PMID:33199453 PubMed Central PMC7683005.
  10. Andrade, JG, Wells, GA, Deyell, MW, Bennett, M, Essebag, V, Champagne, J et al.. Cryoablation or Drug Therapy for Initial Treatment of Atrial Fibrillation. N Engl J Med. 2021;384 (4):305-315. doi: 10.1056/NEJMoa2029980. PubMed PMID:33197159 .
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Affiliations & Other Activities

  • Staff Cardiac Electrophysiologist, St. Michael’s Hospital
  • Professor, Medicine and Cardiology, St. Michael’s Hospital, University of Toronto
  • Director, Division of Cardiology, University of Toronto