Ron Wald

MDCM, MPH

Scientist

Biography

Ron Wald is a nephrologist at St. Michael’s Hospital and Director of the hospital’s Hemodialysis Program. He is a Professor of Medicine at the University of Toronto. A native of Montreal, he completed his undergraduate and medical degrees at McGill University and continued his clinical training in internal medicine and nephrology at the University of Toronto. Following this, he completed his Master of Public Health at Harvard University and a research fellowship at Tufts Medical Center in Boston. Dr. Wald’s research areas are critical care nephrology and maintenance dialysis. He was co-principal investigator of the STARRT-AKI trial, a Canadian Institutes of Health Research-funded international trial on the timing of dialysis initiation in critically ill patients with acute kidney injury. He is also interested in fluid management in the setting of acute kidney injury and the long-term outcomes of patients who survive an episode of acute kidney injury. In the realm of maintenance dialysis, he is on the leadership team of the multinational PHOSPHATE trial that is evaluating whether intensive lowering of serum phosphate reduces the risk of major adverse cardiovascular events.

Please note: Dr. Wald is not taking any summer students.

Recent Publications

  1. Dauz, JD, Yazaki, K, Akazawa, Y, Meister, TA, Kabir, G, Kadowaki, S et al.. Dual inhibition of TGFβ and PDGF improves RV remodeling and function in response to RV pressure or volume-loading. Physiol Rep. 2025;13 (9):e70339. doi: 10.14814/phy2.70339. PubMed PMID:40323168 PubMed Central PMC12051373.
  2. Wing, S, Ray, JG, Yau, K, Jeyakumar, N, Abdullah, S, Luo, B et al.. SGLT2 Inhibitors and Risk for Hyperkalemia Among Individuals Receiving RAAS Inhibitors. JAMA Intern Med. 2025; :. doi: 10.1001/jamainternmed.2025.0686. PubMed PMID:40293730 PubMed Central PMC12038716.
  3. Gouin, M, Joyal, R, Lamothe, M, Luo, YH, Fan, XY, Huard, K et al.. Achievement of fluid removal targets during intermittent renal replacement therapy in the intensive care unit. Clin Kidney J. 2024;17 (9):sfae257. doi: 10.1093/ckj/sfae257. PubMed PMID:40236951 PubMed Central PMC11997759.
  4. McCoy, IE, Liu, KD, Ghamarian, E, Quenot, JP, Zarbock, A, Bihorac, A et al.. Dialysis Dependence in Standard versus Accelerated Initiation of KRT in AKI: A Post Hoc Analysis. Clin J Am Soc Nephrol. 2025; :. doi: 10.2215/CJN.0000000672. PubMed PMID:40232884 .
  5. Wald, RM, Tomlinson, G, Caldarone, CA, Dahdah, N, Dallaire, F, Drolet, C et al.. Outcome Prediction After Tetralogy of Fallot Repair: A Prospective Clinical and Cardiovascular Magnetic Resonance Study. J Am Heart Assoc. 2025;14 (8):e039006. doi: 10.1161/JAHA.124.039006. PubMed PMID:40207483 .
  6. Naylor, KL, Jeyakumar, N, Kang, Y, Dixon, SN, Garg, AX, Al-Jaishi, A et al.. Clinical Outcomes and Healthcare Utilization in Patients Receiving Maintenance Dialysis After the Onset of the COVID-19 Pandemic in Ontario, Canada. Can J Kidney Health Dis. 2025;12 :20543581251328077. doi: 10.1177/20543581251328077. PubMed PMID:40161414 PubMed Central PMC11954382.
  7. Kakarla, J, Ishikita, A, Suszko, A, Wald, R, Nair, K. Risk scores inconsistently predict sudden death and ventricular arrhythmias in repaired tetralogy of Fallot. Heart Rhythm. 2025; :. doi: 10.1016/j.hrthm.2025.02.041. PubMed PMID:40043861 .
  8. Jeong, R, Bagshaw, SM, Ghamarian, E, Harvey, A, Joannidis, M, Kirkham, B et al.. Time to Renal Replacement Therapy Initiation in Critically Ill Patients With Acute Kidney Injury: A Secondary Analysis of the Standard Versus Accelerated Initiation of Renal Replacement Therapy in Acute Kidney Injury (STARRT-AKI) Trial. Crit Care Med. 2025; :. doi: 10.1097/CCM.0000000000006616. PubMed PMID:40029115 .
  9. Slater, J, Maron, DJ, Jones, PG, Bangalore, S, Reynolds, HR, Fu, Z et al.. Evaluating the Appropriate Use Criteria for Coronary Revascularization in Stable Ischemic Heart Disease Using Randomized Data From the ISCHEMIA Trial. Circ Cardiovasc Qual Outcomes. 2025;18 (3):e010849. doi: 10.1161/CIRCOUTCOMES.124.010849. PubMed PMID:40008421 PubMed Central PMC11919559.
  10. Cohen-Hagai, K, Saban, M, Antebi, A, Benchetrit, S, Nacasch, N, Erez, D et al.. Ethnicity, Patient Satisfaction and Clinical Outcomes among Israeli Dialysis Recipients. Kidney360. 2025; :. doi: 10.34067/KID.0000000729. PubMed PMID:39928423 .
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Affiliations & Other Activities

  • Director, Hemodialysis, Division of Nephrology, Department of Medicine, St. Michael’s Hospital
  • Professor, Department of Medicine and Health Policy Management and Evaluation, University of Toronto
  • Adjunct Scientist, Institute for Clinical Evaluative Sciences