Ron Wald


Scientist, Li Ka Shing Knowledge Institute

Tel: 416-867-3703
Twitter: @DrRonWald


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.

Recent Publications

  1. Wald, R, Gallagher, M, Bagshaw, SM. In Reply to 'Why ELAIN and AKIKI Should Not Be Compared: Resolving Discordant Studies'. Am. J. Kidney Dis. 2017; :. doi: 10.1053/j.ajkd.2017.03.002. PubMed PMID:28438341 .
  2. Goodman, ZA, Thomas, SG, Wald, RC, Goodman, JM. Cardiovascular Response to Recreational Hockey in Middle-Aged Men. Am. J. Cardiol. 2017; :. doi: 10.1016/j.amjcard.2017.03.241. PubMed PMID:28438305 .
  3. Jimenez-Juan, L, Karur, GR, Connelly, KA, Deva, D, Yan, RT, Wald, RM et al.. Relationship between right and left ventricular function in candidates for implantable cardioverter defibrillator with low left ventricular ejection fraction. J Arrhythm. 2017;33 (2):134-138. doi: 10.1016/j.joa.2016.07.005. PubMed PMID:28416981 PubMed Central PMC5388044.
  4. Keir, M, Bhagra, C, Vatenmakher, D, Arancibia-Galilea, F, Jansen, K, Toh, N et al.. Paediatric-onset coronary artery anomalies in pregnancy: a single-centre experience and systematic literature review. Cardiol Young. 2017; :1-9. doi: 10.1017/S1047951117000658. PubMed PMID:28412993 .
  5. Bellomo, R, Kellum, JA, Ronco, C, Wald, R, Martensson, J, Maiden, M et al.. Acute kidney injury in sepsis. Intensive Care Med. 2017; :. doi: 10.1007/s00134-017-4755-7. PubMed PMID:28364303 .
  6. Bell, M, Chawla, LS, Wald, R. Understanding renal recovery. Intensive Care Med. 2017; :. doi: 10.1007/s00134-017-4773-5. PubMed PMID:28337509 .
  7. Sarak, B, Wald, R, Goldstein, MB, Deva, DP, Leipsic, J, Kiaii, M et al.. Relationship between changes in blood pressure and left ventricular mass over 1 year in end-stage renal disease. J. Hypertens. 2017; :. doi: 10.1097/HJH.0000000000001353. PubMed PMID:28319597 .
  8. Bagshaw, SM, Darmon, M, Ostermann, M, Finkelstein, FO, Wald, R, Tolwani, AJ et al.. Current state of the art for renal replacement therapy in critically ill patients with acute kidney injury. Intensive Care Med. 2017; :. doi: 10.1007/s00134-017-4762-8. PubMed PMID:28289816 .
  9. Chawla, LS, Bellomo, R, Bihorac, A, Goldstein, SL, Siew, ED, Bagshaw, SM et al.. Acute kidney disease and renal recovery: consensus report of the Acute Disease Quality Initiative (ADQI) 16 Workgroup. Nat Rev Nephrol. 2017;13 (4):241-257. doi: 10.1038/nrneph.2017.2. PubMed PMID:28239173 .
  10. Ross, BA, Wald, R, Goldstein, MB, Yuen, DA, Leipsic, J, Kiaii, M et al.. Relationships Between Left Ventricular Structure and Function According to Cardiac MRI and Cardiac Biomarkers in End-Stage Renal Disease. Can J Cardiol. 2017;33 (4):501-507. doi: 10.1016/j.cjca.2016.11.021. PubMed PMID:28222921 .
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Affiliations & Other Activities

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