Dr Jonathan Ariyaratnam
Research Fellow
School of Medicine
College of Health
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).
| Date | Position | Institution name |
|---|---|---|
| 2024 - ongoing | Post-Doctoral Researcher | University of Adelaide |
| 2024 - ongoing | Senior Cardiology EP and Devices Fellow | Royal Adelaide Hospital |
| 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 | - |
| Date | Institution name | Country | Title |
|---|---|---|---|
| University of Cambridge | United Kingdom | MB BChir | |
| University of Manchester | United Kingdom | MRes | |
| University of Adelaide | Australia | PhD |
| 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 |
| 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 |
| 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, 22(9), e594-e604. Scopus3 WoS3 Europe PMC1 |
| 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, 22(12), 1-9. |
| 2025 | Sanders, P., Ariyaratnam, J. P., Puvrez, A., Middeldorp, M. E., Nicholls, S. J., Thomas, G., . . . Kalman, J. M. (2025). Cardiac Resynchronization Therapy And AV Node Ablation in Heart Failure with Reduced Ejection Fraction and Atrial Fibrillation. Rationale and Design of the CAAN-AF trial. Heart Rhythm O2, 6(11), 1-9. |
| 2025 | Dziano, J. K., Ariyaratnam, J. P., Middeldorp, M. E., Sanders, P., & Elliott, A. D. (2025). Obesity and Atrial Fibrillation: From Mechanisms to Treatment. Heart Lung and Circulation, 34(10), 1021-1032. Scopus1 WoS1 |
| 2025 | Ariyaratnam, J. P., Elliott, A. D., Mishima, R. S., Dziano, J. K., Emami, M., Howie, J. O., . . . Sanders, P. (2025). Evaluating the Impact of Obesity and Epicardial Adiposity on the Presence of HFpEF in Patients With AF.. JACC Clin Electrophysiol, S2405-500X(25)00703-0. |
| 2025 | Saraf, K., Ariyaratnam, J. P., & Morris, G. M. (2025). A left-sided accessory pathway with bidirectional decremental conduction located at the aortomitral continuity. Heartrhythm Case Reports, 11(12), 1296-1302. |
| 2025 | Pathak, R. K., Elliott, A. D., Lau, D. H., Middeldorp, M. E., Linz, D., Fitzgerald, J. L., . . . Sanders, P. (2025). Aggressive Risk Factor Reduction Study for Atrial Fibrillation Implications for Ablation Outcomes: The ARREST-AF Randomized Clinical Trial.. JAMA Cardiol, 10(12), 1295-1304. Scopus2 |
| 2025 | Ariyaratnam, J. P., Horsfall, G., Gall, S. A., Chu, G. S., Arujuna, A. V., & Chalil, S. (2025). The Impact of Prolonged Waiting List Times for Ablation of Atrial Fibrillation on Arrhythmia Recurrence Post-Ablation.. Heart Rhythm, S1547-5271(25)03038-3. |
| 2025 | Kakarla, S., Emami, M., Puvrez, A., Young, G. D., Ariyaratnam, J., Kamsani, S., . . . Sanders, P. (2025). Update on First-in-Human Experience of High-Energy ElectroPulse Pulsed Field Ablation.. Heart Rhythm, S1547-5271(25)03030-9. |
| 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 PMC1 |
| 2024 | 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. Scopus5 WoS3 Europe PMC2 |
| 2024 | 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. Scopus5 WoS4 Europe PMC3 |
| 2024 | 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. Scopus2 WoS2 Europe PMC3 |
| 2024 | 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. Scopus7 WoS7 Europe PMC5 |
| 2024 | 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. Scopus7 WoS6 Europe PMC4 |
| 2024 | 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. Scopus1 WoS1 Europe PMC1 |
| 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. Scopus10 WoS8 Europe PMC6 |
| 2023 | 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. Scopus20 WoS16 Europe PMC18 |
| 2023 | 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. Scopus24 WoS23 Europe PMC13 |
| 2023 | 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. Scopus3 WoS3 Europe PMC1 |
| 2022 | 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. Scopus10 WoS7 Europe PMC5 |
| 2022 | 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 WoS11 Europe PMC11 |
| 2022 | 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. Scopus1 WoS1 |
| 2022 | 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. Scopus15 WoS18 Europe PMC16 |
| 2021 | 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 WoS33 Europe PMC30 |
| 2021 | 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. Scopus34 Europe PMC26 |
| 2021 | 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. Scopus24 WoS20 Europe PMC20 |
| 2021 | 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. Scopus35 WoS32 Europe PMC25 |
| 2021 | 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 WoS1 |
| 2020 | Middeldorp, M. E., Ariyaratnam, J., Lau, D., & Sanders, P. (2020). Lifestyle modifications for treatment of atrial fibrillation. Heart, 106(5), 325-332. Scopus95 WoS86 Europe PMC77 |
| 2020 | 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. Scopus8 Europe PMC7 |
| 2020 | 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. Scopus1 |
| 2020 | 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), 11279. Scopus40 WoS37 Europe PMC33 |
| 2020 | 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 WoS31 Europe PMC27 |
| 2019 | Morris, G. M., & Ariyaratnam, J. P. (2019). Embryology of the Cardiac Conduction System Relevant to Arrhythmias. Cardiac Electrophysiology Clinics, 11(3), 409-420. Scopus7 Europe PMC2 |
| 2017 | 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 WoS26 Europe PMC16 |
| 2017 | 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 WoS2 Europe PMC2 |
| 2014 | 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. Scopus155 WoS130 Europe PMC117 |
| 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. DOI |
| 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. DOI |
| 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. DOI |
| 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. |
| 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 |
| 2025 | Co-Supervisor | The role of continuous remote monitoring in patients with cardiac implantable electronic devices | Doctor of Philosophy | Doctorate | Full Time | Dr Mohamed Abdelmonim Abdelkarim Abbas |
| 2025 | Co-Supervisor | Mapping Beyond Pulmonary Veins: A Comparative Lesional Analysis of Focal and Multipolar Pulsed-field Ablation Systems. | - | Master | Full Time | Dr Sai Kiran Kakarla |
| 2025 | Co-Supervisor | The role of continuous remote monitoring in patients with cardiac implantable electronic devices | Doctor of Philosophy | Doctorate | Full Time | Dr Mohamed Abdelmonim Abdelkarim Abbas |
| 2025 | Co-Supervisor | Surgical technologies in ablation of atrial fibrillation | Master of Research | Master | Full Time | Dr Chris Robins |
| 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 | Left atrial compliance and exercise tolerance in atrial fibrillation | - | Master | Full Time | Dr Sanjai Pattu Valappil |
| 2024 | Co-Supervisor | The role of continuous remote monitoring in patients with cardiac implantable electronic devices | - | Master | Full Time | Dr Mohamed Abdelmonim Abdelkarim Abbas |
| 2024 | Co-Supervisor | Redesigning care with an Emergency Department protocol and rapid access clinic to reduce hospitalisations for Atrial Fibrillation (REDUCE-AF) | - | Master | Full Time | Dr Alessandra Pina |
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