Jonathan Ariyaratnam
Adelaide Medical School
Faculty of Health and Medical Sciences
Eligible to supervise Masters and PhD (as Co-Supervisor) - email supervisor to discuss availability.
Dr. Ariyaratnam is an academic cardiologist and electrophysiologist based at the University of Adelaide. Dr. Ariyaratnam completed his medical degree at the University of Cambridge, United Kingdom. He subsequently completed combined academic and clinical training in core medicine and cardiology as part of the prestigious NIHR clinical-academic training programme. He then completed subspecialty training and PhD in cardiac electrophysiology at the University of Adelaide and Royal Adelaide Hospital under the supervision of Professor Prash Sanders.
Dr. Ariyaratnam's research encompasses all aspects of heart rhythm disorders and cardiac implantable devices. He has developed expertise in the relationship between atrial fibrillation and heart failure with preserved ejection fraction and is leading several studies investigating this. In addition, Dr. Ariyaratnam has co-led two randomised clinical trials investigating the management of atrial fibrillation, including the CS-ROOF RCT and the CAAN-AF RCT. Dr. Ariyaratnam has been awarded several national and international awards for his research including the Heart Rhythm Society Young Investigator Award (2024), the University of Adelaide Dean's Commendation for Doctoral Thesis Excellence (2024) the American Heart Association Samuel A. Levine Early Career Research Award (Finalist, 2022), the CSANZ Ralph Reader Clinical Science Prize (Finalist, 2022) and the Central Adelaide Local Health Network Nimmo Prize for Full-TIme Research (2022).
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Appointments
Date Position Institution name 2024 - ongoing Post-Doctoral Researcher University of Adelaide 2024 - ongoing Senior Cardiology EP and Devices Fellow Royal Adelaide Hospital -
Awards and Achievements
Date Type Title Institution Name Country Amount 2024 Award Heart Rhythm Society Young Investigator Award Heart Rhythm Society United States - 2024 Award Dean's Commendation for Doctoral Thesis Excellence University of Adelaide Australia - 2022 Award Samuel A. Levine Early Career Investigator Finalist American Heart Association United States - 2022 Award Nimmo Prize Central Adelaide Local Health Network Australia - 2022 Award Ralph Reader Clinical Science Prize Finalist Cardiac Society of Australia and New Zealand Australia - -
Education
Date Institution name Country Title University of Cambridge United Kingdom MB BChir University of Manchester United Kingdom MRes University of Adelaide Australia PhD -
Postgraduate Training
Date Title Institution Country 2019 - 2023 Cardiac Electrophysiology and Devices Fellow Royal Adelaide Hospital Australia 2018 Senior Cardiology Registrar and Electrophysiology Fellow Health Education North West United Kingdom 2015 - 2018 Academic Clinical Fellow in Cardiology Health Education North West United Kingdom 2013 - 2015 Core Medical Trainee Oxford University Hospitals NHS Trust United Kingdom 2011 - 2013 Academic Foundation Trainee Health Education West Yorkshire United Kingdom -
Certifications
Date Title Institution name Country 2025 Certified Cardiac Electrophysiology Specilist - Adult International Board of Heart Rhythm Experts - 2024 Certificate of Completion of Training (Cardiology) Royal College of Physicians United Kingdom — MRCP Royal College of Physicians United Kingdom — Certified Cardiac Device Specialist The International Board of Heart Rhythm Experts United States
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Journals
Year Citation 2025 Valappil, S. P., Chapman, D., Muenzinger, C., Puvrez, A., Ariyaratnam, J. P., Jayakumar, M., . . . Sanders, P. (2025). Left Bundle Area Pacing In Hypertrophied Hearts: An Ex-Vivo Ovine Model To Study Deployment Of Pacing Leads In Thick Septum. Heart Rhythm, 22(8), 2055-2064.
2025 Abbas, M., Emami, M., Kamsani, S. H., Ariyaratnam, J. P., Wilson, L., Stolcman, S., . . . Sanders, P. (2025). Pulsed-field ablation for atrial fibrillation in patients with cardiac implantable electronic devices. Heart Rhythm, S1547-5271(25)02393-8.
2025 Howie, J. O., Dziano, J. K., Ariyaratnam, J. P., Abbas, M., Kenny, G. T., Evans, S., . . . Elliott, A. D. (2025). The Association of Age and Left Atrial Dysfunction in Patients with Atrial Fibrillation.. Heart Rhythm, S1547-5271(25)02634-7.
2025 Kamsani, S. H., Fitzgerald, J. L., Thiyagarajah, A., Evans, S., Jayakumar, M., Ariyaratnam, J. P., . . . Lau, D. H. (2025). Adoption of left bundle branch area pacing using stylet-driven lead in a tertiary academic training center: Learning curve and acute procedural outcomes. Heart Rhythm O2, 6(3), 253-258.
Europe PMC12024 Ariyaratnam, J. P., Mishima, R. S., McNamee, O., Emami, M., Thiyagarajah, A., Fitzgerald, J. L., . . . Elliott, A. D. (2024). Exercise echocardiography to assess left atrial function in patients with symptomatic AF. International Journal of Cardiology: Heart & Vasculature, 50, 101324-1-101324-7.
Scopus1 Europe PMC12024 Ariyaratnam, J. P., Elliott, A. D., Mishima, R. S., Kadhim, K., Emami, M., Fitzgerald, J. L., . . . Sanders, P. (2024). Structural, Functional, and Electrical Remodelling of the Atria with Reduced Cardiorespiratory Fitness: Implications for AF. JACC: Clinical Electrophysiology, 10(7.2), 1608-1619.
Scopus2 Europe PMC12024 Ariyaratnam, J. P., Middeldorp, M. E., Brooks, A. G., Thomas, G., Kadhim, K., Mahajan, R., . . . Sanders, P. (2024). Coronary Sinus Isolation for High Burden Atrial Fibrillation. A Randomized Clinical Trial. JACC: Clinical Electrophysiology, 11(1), 1-9.
Scopus1 Europe PMC22024 Shroff, J. P., Nair, A., Tuan, L. Q., Raja, D. C., Abhilash, S. P., Mehta, A., . . . Pathak, R. K. (2024). Electrocardiographic predictors of clinical outcomes in nonischemic cardiomyopathy patients with left bundle branch area pacing cardiac resynchronization therapy. Heart Rhythm, 22(6), 1523-1532.
Scopus5 Europe PMC12024 Shroff, J. P., Nair, A., Raja, D. C., Abhilash, S. P., Fiorese, S., Ariyaratnam, J., . . . Pathak, R. K. (2024). Comparison of Procedural Outcomes of Lumenless Fixed-Helix Versus Stylet-Driven Extendable-Helix Lead Systems in Left Bundle Branch Pacing: COMPARE LBBP.. Circulation. Arrhythmia and electrophysiology, 17(12), e013385.
Scopus5 Europe PMC12024 Ariyaratnam, J. P., Elliott, A. D., & Sanders, P. (2024). Reply: Subclinical Heart Failure With Preserved Ejection Fraction in Patients With Atrial Fibrillation.. JACC. Heart failure, 12(2), 423.
2024 Ariyaratnam, J. P., Mishima, R. S., Kadhim, K., Emami, M., Fitzgerald, J. L., Thiyagarajah, A., . . . Elliott, A. D. (2024). Utility and Validity of the HFA-PEFF and H2FPEF Scores in Patients With Symptomatic Atrial Fibrillation. JACC: Heart Failure, 12(6), 1015-1025.
Scopus5 Europe PMC42023 Elliott, A., Ariyaratnam, J., Howden, E. J., La Gerche, A., & Sanders, P. (2023). Influence of Exercise Training on the Left Atrium : Implications for Atrial Fibrillation, Heart Failure and Stroke. American Journal of Physiology: Heart and Circulatory Physiology, 325(4), H822-H836.
Scopus16 Europe PMC162023 Ariyaratnam, J. P., Elliott, A. D., Mishima, R. S., Kadhim, K., McNamee, O., Kuklik, P., . . . Sanders, P. (2023). Identification of Subclinical Heart Failure With Preserved Ejection Fraction in Patients With Symptomatic Atrial Fibrillation. JACC: Heart Failure, 11(11), 1626-1638.
Scopus21 WoS1 Europe PMC112023 Pitman, B. M., Ariyaratnam, J., Williams, K., Evans, M., Reid-Smith, N., Wilson, L., . . . Lau, D. H. (2023). The Burden of Cardiac Implantable Electronic Device Checks in the Peri-MRI Setting: The CHECK-MRI Study.. Heart Lung and Circulation, 32(2), 252-260.
Scopus1 Europe PMC12022 Emami, M., Ariyaratnam, J. P., Pitman, B. M., & Lau, D. H. (2022). Tailored Cryoballoon Pulmonary Vein Ablation for Atrial Fibrillation: When to Stop the Freeze?. Heart, lung & circulation, 31(4), 457-459.
2022 Noubiap, J. J., Nyaga, U. F., Middeldorp, M. E., Fitzgerald, J. L., Ariyaratnam, J. P., Thomas, G., & Sanders, P. (2022). Frequency and prognostic significance of atrial fibrillation in acute pulmonary embolism: A pooled analysis. Respiratory Medicine, 199, 1-7.
Scopus7 WoS2 Europe PMC42022 Mishima, R. S., Ariyaratnam, J. P., Pitman, B. M., Malik, V., Emami, M., McNamee, O., . . . Elliott, A. D. (2022). Cardiorespiratory fitness, obesity and left atrial function in patients with atrial fibrillation. International Journal of Cardiology: Heart & Vasculature, 42, 101083-1-101083-8.
Scopus11 WoS3 Europe PMC102022 Ariyaratnam, J. P., Sanders, P., & Elliott, A. D. (2022). Atrial Fibrillation Ablation in Patients with Heart Failure with Preserved Ejection Fraction: Complexities in Diagnosis and Treatment. Heart Rhythm O2, 3(5), 509-510.
Scopus12022 Middeldorp, M. E., Ariyaratnam, J. P., Kamsani, S. H., Albert, C. M., & Sanders, P. (2022). Hypertension and atrial fibrillation.. Journal of hypertension, 40(12), 2337-2352.
Scopus9 WoS2 Europe PMC102021 Mishima, R. S., Verdicchio, C. V., Noubiap, J. J., Ariyaratnam, J. P., Gallagher, C., Jones, D., . . . Elliott, A. D. (2021). Self-reported Physical Activity and Atrial Fibrillation Risk: A Systematic Review and Meta-analysis. Heart Rhythm, 18(4), 520-528.
Scopus34 WoS12 Europe PMC282021 Ariyaratnam, J. P., Lau, D. H., Sanders, P., & Kalman, J. M. (2021). Atrial Fibrillation and Heart Failure: Epidemiology, Pathophysiology, Prognosis, and Management. Cardiac Electrophysiology Clinics, 13(1), 47-62.
Scopus33 Europe PMC242021 Boyett, M. R., Yanni, J., Tellez, J., Bucchi, A., Mesirca, P., Cai, X., . . . D'Souza, A. (2021). Regulation of sinus node pacemaking and atrioventricular node conduction by HCN channels in health and disease. Progress in Biophysics and Molecular Biology, 166, 61-85.
Scopus22 Europe PMC182021 Ariyaratnam, J. P., Elliott, A. D., Mishima, R. S., Gallagher, C., Lau, D. H., & Sanders, P. (2021). Heart failure with preserved ejection fraction: An alternative paradigm to explain the clinical implications of atrial fibrillation. Heart Rhythm O2, 2(6), 771-783.
Scopus29 WoS5 Europe PMC212021 Ariyaratnam, J. P., Stokes, M. B., & Lau, D. H. (2021). Implantable cardioverter-defibrillator in patients awaiting heart transplantation: Reinforcing the bridge to transplant. Heart Rhythm O2, 2(6), 719-720.
Scopus1 WoS12020 Middeldorp, M. E., Ariyaratnam, J., Lau, D., & Sanders, P. (2020). Lifestyle modifications for treatment of atrial fibrillation. Heart, 106(5), 325-332.
Scopus90 WoS50 Europe PMC602020 Ariyaratnam, J. P., Middeldorp, M., Thomas, G., Noubiap Nzeale, J. J. N., Lau, D., & Sanders, P. (2020). Risk factor management before and after atrial fibrillation ablation. Cardiac Electrophysiology Clinics, 12(2), 141-154.
Scopus7 Europe PMC52020 Ariyaratnam, J. P., & Sanders, P. (2020). Protecting the Oesophagus During Left Atrial Ablation: A Surplus of Options but an Absence of Evidence.. Indian Pacing Electrophysiol J, 20(6), 219-220.
Scopus12020 Yanni, J., D’Souza, A., Wang, Y., Li, N., Hansen, B. J., Zakharkin, S. O., . . . Boyett, M. R. (2020). Silencing miR-370-3p rescues funny current and sinus node function in heart failure. Scientific Reports, 10(1), 23 pages.
Scopus36 Europe PMC282020 Katsaras, D., Ariyaratnam, J., Chalil, S., & Abozguia, K. (2020). An unusual response of pulmonary vein bigeminy to antral ablation.. Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing, 59(3), 619-621.
2019 Virk, S. A., Ariyaratnam, J., Bennett, R. G., & Kumar, S. (2019). Updated systematic review and meta-analysis of the impact of contact force sensing on the safety and efficacy of atrial fibrillation ablation: Discrepancy between observational studies and randomized control trial data. Europace, 21(2), 239-249.
Scopus34 Europe PMC212019 Morris, G. M., & Ariyaratnam, J. P. (2019). Embryology of the Cardiac Conduction System Relevant to Arrhythmias. Cardiac Electrophysiology Clinics, 11(3), 409-420.
Scopus6 Europe PMC22017 Boyett, M. R., Wang, Y., Nakao, S., Ariyaratnam, J., Hart, G., Monfredi, O., & D’Souza, A. (2017). Point: Exercise training-induced bradycardia is caused by changes in intrinsic sinus node function. Journal of Applied Physiology, 123(3), 684-685.
Scopus26 Europe PMC152017 Boyett, M. R., Wang, Y., Nakao, S., Ariyaratnam, J., Hart, G., Monfredi, O., & D’Souza, A. (2017). Rebuttal from Boyett et al.. Journal of Applied Physiology, 123(3), 689.
Scopus3 Europe PMC12014 Ariyaratnam, J., & Subramanian, V. (2014). Association between thiopurine use and nonmelanoma skin cancers in patients with inflammatory bowel disease: A meta-analysis. American Journal of Gastroenterology, 109(2), 163-169.
Scopus148 Europe PMC105 -
Conference Papers
Year Citation 2024 Shahmohamadi, E., Middeldorp, M., Ariyaratnam, J., Jayakumar, M., Fitzgerald, J., Elliott, A., & Sanders, P. (2024). Ethnic differences in Body Mass Index Cut-off Values Associated with Cardiovascular Risks in South Asians Compared to White Population: A Systematic Review and Meta-analysis. In CIRCULATION Vol. 150 (pp. 3 pages). IL, Chicago: LIPPINCOTT WILLIAMS & WILKINS.
2024 Dziano, J., Howie, J., Ariyaratnam, J., Middeldorp, M., Emami, M., Mishima, R., . . . Elliott, A. (2024). Abnormalities in Cardiopulmonary Exercise Test Associated With More Advance Atrial Cardiomyopathy. In Heart Lung and Circulation Vol. 33 (pp. S146-S147). Elsevier BV.
2024 Abbas, M., Ariyaratnam, J., Dziano, J., Howie, J., Fitzgerald, J., Jayakumar, M., . . . Sanders, P. (2024). Implications of Rate Limiting Medications in Patients with Atrial Fibrillation and Heart Failure with Preserved Ejection Fraction. In CIRCULATION Vol. 150 (pp. 2 pages). IL, Chicago: LIPPINCOTT WILLIAMS & WILKINS.
2021 Ariyaratnam, J. P., Mishima, R., Gallagher, C., Emami, M., Wong, C., Malik, V., . . . Sanders, P. (2021). Left Atrial Hemodynamics and Invasive Functional Testing to Characterize Heart Failure With Preserved Ejection Fraction in Patients With Atrial Fibrillation. In CIRCULATION Vol. 144 (pp. 3 pages). Boston, MA: LIPPINCOTT WILLIAMS & WILKINS. -
Conference Items
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Current Higher Degree by Research Supervision (University of Adelaide)
Date Role Research Topic Program Degree Type Student Load Student Name 2025 Co-Supervisor Surgical technologies in ablation of atrial fibrillation Master of Philosophy (Surgery) Master Full Time Dr Chris Robins 2025 Co-Supervisor Mapping Beyond Pulmonary Veins: A Comparative Lesional Analysis of Focal and Multipolar Pulsed-field Ablation Systems. Master of Philosophy (Clinical Science) Master Full Time Dr Sai Kiran Kakarla 2024 Co-Supervisor Redesigning care with an Emergency Department protocol and rapid access clinic to reduce hospitalisations for Atrial Fibrillation (REDUCE-AF) Master of Philosophy (Clinical Science) Master Full Time Dr Alessandra Pina 2024 Co-Supervisor Left atrial compliance and exercise tolerance in atrial fibrillation Master of Philosophy (Medical Science) Master Full Time Dr Sanjai Pattu Valappil 2024 Co-Supervisor The role of continuous remote monitoring in patients with cardiac implantable electronic devices Master of Philosophy (Medical Science) Master Full Time Dr Mohamed Abdelmonim Abdelkarim Abbas
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