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. Saadia, A, Wald, R, Potruch, A, Pizov, G, Meir, K, Gorin, K et al.. Case Report: A potential novel treatment for drug-induced acute interstitial nephritis: Benralizumab. Front Immunol. 2025;16 :1720992. doi: 10.3389/fimmu.2025.1720992. PubMed PMID:41333468 PubMed Central PMC12665518.
  2. Friedberg, MK, Wald, RM. Function Follows Form: The Relationship Between Right Ventricular Shape and Adverse Outcomes in Patients With Hypoplastic Left Heart Syndrome. Circ Cardiovasc Imaging. 2025; :e019209. doi: 10.1161/CIRCIMAGING.125.019209. PubMed PMID:41321246 .
  3. Mets, G, Bitterman, Y, Mercer-Rosa, L, Wald, R, Friedberg, MK. Noninvasive Assessment of Right Ventricular-Pulmonary Arterial Coupling in Repaired Tetralogy of Fallot by Magnetic Resonance Imaging. J Am Heart Assoc. 2025; :e042371. doi: 10.1161/JAHA.125.042371. PubMed PMID:41294083 .
  4. Lichter, Y, Gal Oz, A, Moshkovits, I, Wald, R, Stavi, D, Goder, N et al.. Spontaneous diuresis as a marker of successful liberation from positive pressure ventilation: A retrospective observational study. J Crit Care. 2025;92 :155355. doi: 10.1016/j.jcrc.2025.155355. PubMed PMID:41252989 .
  5. Yau, K, Ray, JG, Jeyakumar, N, Luo, B, Abdullah, S, Dixon, SN et al.. Glucagon-like Peptide-1 Receptor Agonists and Risk of Major Adverse Cardiovascular Events in Patients With CKD. Am J Kidney Dis. 2025; :. doi: 10.1053/j.ajkd.2025.09.010. PubMed PMID:41238166 .
  6. Lichter, Y, Bagshaw, SM, Wald, R. Renal Replacement Therapy in Critically ill Patients: Navigating the Timing Debate. J Intensive Care Med. 2025; :8850666251368275. doi: 10.1177/08850666251368275. PubMed PMID:41186571 .
  7. Varghese, A, Kang, Y, Cowan, A, Holden, R, Wald, R, Clemens, KK et al.. Monitoring, Control, and Clinical Outcomes Associated With Chronic Kidney Disease-Mineral Bone Disorder: A Population-Based Cohort Study in Ontario, Canada. Kidney Med. 2025;7 (10):101080. doi: 10.1016/j.xkme.2025.101080. PubMed PMID:41078623 PubMed Central PMC12509893.
  8. Yalonetsky, S, Lorber, A, Wald, R, Oechslin, E. Gerbode-Type Defects in Adults After Repair of Tetralogy of Fallot: A Case Series. CASE (Phila). 2025;9 (9):316-324. doi: 10.1016/j.case.2025.06.002. PubMed PMID:41049618 PubMed Central PMC12490596.
  9. Round, J, Akpinar, I, Yan, C, Patel, N, van Katwyk, S, Montgomery, C et al.. Cost-Utility Analysis of Accelerated and Standard Strategies for Renal Replacement Therapy Initiation. JAMA Netw Open. 2025;8 (10):e2535343. doi: 10.1001/jamanetworkopen.2025.35343. PubMed PMID:41042508 PubMed Central PMC12495491.
  10. Gal Oz, A, Wald, R, Stavi, D, Lichter, Y, Angel, Y, Sold, O et al.. Authors reply: "Response to furosemide and the receipt of kidney replacement therapy in critically ill patients". J Crit Care. 2025;91 :155272. doi: 10.1016/j.jcrc.2025.155272. PubMed PMID:41005028 .
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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