Ron Wald




Ron Wald is a nephrologist and Associate 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 a Master in Public Health at Harvard University and a research fellowship at Tufts Medical Center in Boston. Since joining the St. Michael’s Hospital Division of Nephrology in 2006, Dr. Wald has been responsible for the hospital’s acute dialysis program. In addition to attending on the hospital’s Nephrology consult and ward services, he provides longitudinal care for patients on chronic hemodialysis and has an active general nephrology practice.

Dr. Wald’s research interests are in the areas of critical care nephrology and chronic dialysis. He is currently leading a Canadian Institutes of Health Research-funded international trial on the impact of the timing of dialysis initiation on survival in critically ill patients with acute kidney injury. He also has a strong interest in the long-term outcomes of patients who survive an episode of acute kidney injury and is co-leading a trial that is comparing specialized nephrology care vs usual care in this population. In the chronic dialysis area, Dr. Wald co-led a CIHR-funded study on the cardiovascular benefits of incentre nocturnal hemodialysis. He recently completed a multicentre pilot trial examining the implementation of two different levels of serum phosphate control in the hemodialysis population. A larger definitive trial to evaluate whether intensive serum phosphate lowering mediates improved clinical outcomes is planned. As a founding member of the Kidney Dialysis and Transplantation Program of the Institute for Clinical Evaluative Sciences, Dr. Wald is also involved in several studies that are using province-wide administrative data to answer research questions in kidney disease.

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

Recent Publications

  1. Laflamme, E, Wald, RM, Roche, SL, Silversides, CK, Thorne, SA, Colman, JM et al.. Outcome and right ventricle remodelling after valve replacement for pulmonic stenosis. Heart. 2021; :. doi: 10.1136/heartjnl-2021-320121. PubMed PMID:34815333 .
  2. Jeong, R, Wald, R, Bagshaw, SM. Timing of renal-replacement therapy in intensive care unit-related acute kidney injury. Curr Opin Crit Care. 2021;27 (6):573-581. doi: 10.1097/MCC.0000000000000891. PubMed PMID:34757994 .
  3. Ali, LA, Gentili, F, Festa, P, Perrone, MA, Curione, D, Caputo, M et al.. Long-term assessment of clinical outcomes and disease progression in patients with corrected Tetralogy of Fallot. Eur Rev Med Pharmacol Sci. 2021;25 (20):6300-6310. doi: 10.26355/eurrev_202110_27000. PubMed PMID:34730210 .
  4. Wald, R, Siew, ED. Survival and kidney recovery among recipients of continuous renal replacement therapy. Semin Dial. 2021;34 (6):495-500. doi: 10.1111/sdi.13016. PubMed PMID:34533863 .
  5. Robinson, CH, Jeyakumar, N, Wald, R, Zappitelli, M, Chanchlani, R. Authors' Reply. J Am Soc Nephrol. 2021;32 (10):2681-2682. doi: 10.1681/ASN.2021060879. PubMed PMID:34531178 .
  6. Wichert-Schmitt, B, Steckham, KE, Pfaller, B, Colman, JM, Wald, RM, Sermer, M et al.. Cardiac Complications in Pregnant Women With Isolated Mitral Stenosis and Their Association With Echocardiographic Changes During Pregnancy. Am J Cardiol. 2021;158 :81-89. doi: 10.1016/j.amjcard.2021.07.037. PubMed PMID:34509293 .
  7. Van Herreweghe, I, Texiwala, S, Pinto, R, Wald, R, Adhikari, NKJ. Predictors of early mortality in critically ill patients with acute kidney injury necessitating renal replacement therapy: A cohort study. J Crit Care. 2021;66 :96-101. doi: 10.1016/j.jcrc.2021.08.011. PubMed PMID:34507080 .
  8. Shapiro, J, Ray, JG, McArthur, E, Jeyakumar, N, Chanchlani, R, Harel, Z et al.. Risk of Acute Kidney Injury After Hypertensive Disorders of Pregnancy: A Population-Based Cohort Study. Am J Kidney Dis. 2021; :. doi: 10.1053/j.ajkd.2021.07.017. PubMed PMID:34487795 .
  9. Dixon, SN, Sontrop, JM, Al-Jaishi, A, Killin, L, McIntyre, CW, Anderson, S et al.. MyTEMP: Statistical Analysis Plan of a Registry-Based, Cluster-Randomized Clinical Trial. Can J Kidney Health Dis. 2021;8 :20543581211041182. doi: 10.1177/20543581211041182. PubMed PMID:34471542 PubMed Central PMC8404662.
  10. Harel, Z, McArthur, E, Jeyakumar, N, Sood, MM, Garg, AX, Silver, SA et al.. The Risk of Acute Kidney Injury with Oral Anticoagulants in Elderly Adults with Atrial Fibrillation. Clin J Am Soc Nephrol. 2021;16 (10):1470-1479. doi: 10.2215/CJN.05920421. PubMed PMID:34407990 PubMed Central PMC8499008.
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Affiliations & Other Activities

  • Nephrologist, Department of Medicine, St. Michael’s Hospital
  • Associate Professor, Department of Medicine, University of Toronto