Appointments and affiliations
Staff Electrophysiologist
University of Ottawa Heart Institute
Professor
Division of Cardiology, Department of Medicine
University of Ottawa
Adjunct Professor
Department of Medicine
Queen’s University
Damian Paul Redfearn, MD, is a staff cardiac electrophysiologist in the Division of Cardiology at the University of Ottawa Heart Institute and a full professor in the Department of Medicine at the University of Ottawa.
He has been recruited to the electrophysiology (EP) team to expand capacity for complex and advanced EP procedures in the Ottawa region.
Background
Dr. Redfearn was born and educated in the UK. He graduated from the Leicester Medical School and specialized in cardiology with subspecialty training in cardiac electrophysiology at the University Hospitals Birmingham NHS Foundation Trust. He moved to Canada in 2004 to pursue research and clinical training within the field of cardiac electrophysiology.
He was recruited to Queen’s University in Kingston, Ontario in 2006 and was appointed director of the heart rhythm service in 2007, and chair of cardiology in 2023. Dr. Redfearn was a clinician scientist with cross appointment to the School of Computing at Queen’s University. He was promoted to the rank of full professor in 2017. He has a track record of training graduate students and clinical trainees, having supervised 24 graduate students and trained 17 EP fellows. He holds several peer-reviewed research grants to investigate the mechanisms of atrial fibrillation and ventricular arrhythmia through advanced signal processing. He has authored over 300 peer-reviewed publications and holds three US patents on arrhythmia-based algorithms. He was recruited to Ottawa in 2025. Taken together, Dr. Redfearn’s aptitude to straddle both worlds of advanced computing and electrophysiology positions him to improve the clinical management of arrhythmia patients in his new position within the electrophysiology team in the Division of Cardiology, Department of Medicine at the University of Ottawa.
Research and clinical interests
Dr. Redfearn is an experienced electrophysiologist with world-renown expertise in the management of arrhythmia with procedural intervention. He pioneered new techniques for catheter ablation of atrial flutter, atrial fibrillation and ventricular tachycardia, and continues a keen interest in advancing the field of interventional electrophysiology. He has developed and patented a mapping program for atrial fibrillation called TARLESS, which he hopes to test as a clinical tool for patient care. In addition Dr. Redfearn’s research program, which involves computer scientists and cardiologists, will develop and implement novel signal processing techniques to advance the field, with the aim of mapping rhythms like atrial fibrillation that are currently approached only by anatomical guidance due to lack of effective mapping technology.
Publications
Publication profiles:
Dr Redfearn’s H index is 39, i10 103 and his publications have been cited 5837 times.
Selected publications:
- Crinion D, Neira V, Al Hamad N, de Leon A, Bakker D, Korogyi A, Abdollah H, Glover B, Simpson C, Baranchuk A, Chacko S, Enriquez A, Redfearn D. Close-coupled pacing to identify the "functional" substrate of ventricular tachycardia: Long-term outcomes of the paced electrogram feature analysis technique. Heart Rhythm. 2021 May;18(5):723-731. doi:10.1016/j.hrthm.2020.12.022. Epub 2020 Dec 27. PMID: 33378703.
- Shariat MH, Neira V, Redfearn DP. Sequential Intracardiac Activation Time Mapping of Arrhythmias Without Fiducial Time References. IEEE Trans Biomed Eng.2024 May;71(5):1478-1487. doi: 10.1109/TBME.2023.3340524. Epub 2024 Apr 22.PMID: 38060362.
- Ryckman N, Crinion D, Enriquez A, Bakker D, Chacko S, Abdollah H, Baranchuk A, Simpson C, Redfearn DP. Right atrial collision time (RACT): A novel marker of propensity for typical atrial flutter. J Cardiovasc Electrophysiol. 2023Jun;34(6):1377-1383. doi:10.1111/jce.15935. Epub 2023 May 24. PMID: 37222182.
- Enriquez A, Korogyi A, Bakker D, Chacko S, Neira V, Simpson C, Abdollah H, Baranchuk A, Redfearn D. Late, Slow, or Decremental: Elucidating the Ideal Surrogate for Ventricular Tachycardia Isthmus. JACC Clin Electrophysiol. 2023Feb;9(2):280-282. doi:10.1016/j.jacep.2022.09.023. Epub 2022 Nov 30. PMID:36858702.
- Shariat MH, Hashemi J, Gazor S, Redfearn DP. Regional Dominant Frequency: A New Tool for Wave Break Identification During Atrial Fibrillation. Front Cardiovasc Med. 2018 Jun 25;5:79. doi: 10.3389/fcvm.2018.00079. PMID: 29988509;PMCID: PMC6026623.
- Enriquez A, Ali FS, Boles U, Michael K, Simpson C, Abdollah H, Baranchuk A, Redfearn D. Unipolar voltage threshold of 5.0 mV is optimal to localize critical isthmuses in post-infarction patients presenting with ventricular tachycardia. Int J Cardiol. 2015;187:438-42. doi: 10.1016/j.ijcard.2015.03.397. Epub 2015 Mar 28. PMID: 25841144.
- Miranda RI, Nault M, Johri A, Simpson CS, Michael KA, Abdollah H, Baranchuk A, Redfearn DP. Maximal electric separation-guided placement of right ventricular lead improves responders in cardiac resynchronization defibrillator therapy. Circ Arrhythm Electrophysiol. 2012 Oct;5(5):927-32. doi: 10.1161/CIRCEP.111.967208. Epub 2012 Sep 7. PMID: 22962420.
- Redfearn DP, Simpson CS, Abdollah H, Baranchuk AM. Temporo-spatial stability of complex fractionated atrial electrograms in two distinct and separate episodes of paroxysmal atrial fibrillation. Europace. 2009 Nov;11(11):1440-4. doi: 10.1093/europace/eup287. PMID: 19880410.
- Redfearn DP, Skanes AC, Gula LJ, Krahn AD, Yee R, Klein GJ. Cavotricuspid isthmus conduction is dependent on underlying anatomic bundle architecture: observations using a maximum voltage-guided ablation technique. J Cardiovasc Electrophysiol. 2006 Aug;17(8):832-8. doi: 10.1111/j.1540-8167.2006.00512.x. PMID: 16903961.
- Redfearn DP, Trim GM, Skanes AC, Petrellis B, Krahn AD, Yee R, Klein GJ. Esophageal temperature monitoring during radiofrequency ablation of atrial fibrillation. J Cardiovasc Electrophysiol. 2005 Jun;16(6):589-93. doi: 10.1111/j.1540-8167.2005.40825.x. PMID: 15946354.