Paul Dorian


Scientist, Keenan Research Centre for Biomedical Science

Research Programs


Dr. Paul Dorian is the Department Director, Division of Cardiology, University of Toronto and Staff Cardiac Electrophysiologist at St. Michael’s Hospital. He is 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.

Dr. Dorian received his medical degree from McGill University in Montreal in 1976. He continued training in Internal Medicine and Cardiology at the University of Toronto, and received certification by the Royal College of Physicians and Surgeons of Canada in Internal Medicine in 1983 and certification in Cardiology in 1984. He completed training in Clinical Pharmacology at the University of Toronto in 1982, and received an MSc in Pharmacology from the University of Toronto in 1982. From 1983 to 1985, he completed a Fellowship in Cardiac Electrophysiology at Stanford University Medical Centre in California.

His research interests include basic science research in advanced cardiac life support and atrial fibrillation, the clinical pharmacology of antiarrhythmic drugs, and clinical research on implanted devices, antiarrhythmic drugs, and quality of life in patients with arrhythmias.

He is the immediate Past-President of the Canadian Heart Rhythm Society, Chairman of the Cardiac Arrest Committee, St. Michael’s Hospital, Co-Principle Investigator on the National Institutes of Health funded Resuscitation Outcomes Consortium, and serves on the steering committee of multiple multicenter clinical trials in arrhythmia care. He is the Chair of the Canadian Cardiovascular Society Quality Committee.

He has published over 350 peer reviewed papers and is Associate Editor of the textbook Electrophysiological Disorders of the Heart.

Please note: Dr. Dorian is not taking any summer students in 2018.

Recent Publications

  1. Abumuamar, AM, Dorian, P, Newman, D, Shapiro, CM. A Comparison of Two Nights of Ambulatory Sleep Testing in Arrhythmia Patients. Sleep Disord. 2018;2018 :2394146. doi: 10.1155/2018/2394146. PubMed PMID:29973998 PubMed Central PMC6008611.
  2. Tan, NS, Dorian, P. Out-of-Hospital Cardiac Arrest in the Presence of Ischemic Heart Disease: What Is the Long-term Arrhythmic Risk After Revascularization?. Can J Cardiol. 2018; :. doi: 10.1016/j.cjca.2018.04.001. PubMed PMID:29958725 .
  3. Bhatia, RS, Dorian, P. Screening for Cardiovascular Disease Risk With Electrocardiography. JAMA Intern Med. 2018; :. doi: 10.1001/jamainternmed.2018.2773. PubMed PMID:29896637 .
  4. Kotha, VK, Deva, DP, Connelly, KA, Freeman, MR, Yan, RT, Mangat, I et al.. Cardiac MRI and radionuclide ventriculography for measurement of left ventricular ejection fraction in ICD candidates. Magn Reson Imaging. 2018;52 :69-74. doi: 10.1016/j.mri.2018.05.012. PubMed PMID:29859946 .
  5. Goodman, JM, Banks, L, Connelly, KA, Yan, A, Backx, PH, Dorian, P et al.. Excessive Exercise in Endurance Athletes: Is Atrial Fibrillation a Possible Consequence?. Appl Physiol Nutr Metab. 2018; :. doi: 10.1139/apnm-2017-0764. PubMed PMID:29842800 .
  6. Sharma, A, Al-Khatib, SM, Ezekowitz, JA, Cooper, LB, Fordyce, CB, Michael Felker, G et al.. Implantable cardioverter-defibrillators in heart failure patients with reduced ejection fraction and diabetes. Eur. J. Heart Fail. 2018;20 (6):1031-1038. doi: 10.1002/ejhf.1192. PubMed PMID:29761861 .
  7. Dorian, P, Angaran, P. Symptoms and Quality of Life After Atrial Fibrillation Ablation: Two Different Concepts. JACC Clin Electrophysiol. 2017;3 (10):1177-1179. doi: 10.1016/j.jacep.2017.06.007. PubMed PMID:29759502 .
  8. Abumuamar, AM, Dorian, P, Newman, D, Shapiro, CM. The prevalence of obstructive sleep apnea in patients with atrial fibrillation. Clin Cardiol. 2018;41 (5):601-607. doi: 10.1002/clc.22933. PubMed PMID:29745973 .
  9. Abumuamar, AM, Dorian, P, Newman, D, Shapiro, CM. The STOP-BANG questionnaire shows an insufficient specificity for detecting obstructive sleep apnea in patients with atrial fibrillation. J Sleep Res. 2018; :e12702. doi: 10.1111/jsr.12702. PubMed PMID:29682848 .
  10. Landry, CH, Connelly, KA, Dorian, P. Cardiac Arrest during Competitive Sports. N. Engl. J. Med. 2018;378 (15):1464-1465. doi: 10.1056/NEJMc1802593. PubMed PMID:29641968 .
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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