Dr. Waleed Alhazzani

Division of Critical Care

Waleed Alhazzani


Assistant Professor, Division of Critical Care, Department of Medicine

Associate Member, Clinical Epidemiology and Biostatistics

Active Staff, Intensive Care, General Internal Medicine, and Gastroenterology, St. Joseph’s Healthcare Hamilton.




Education and Professional Standing

MBBS (Saudi Arabia),
MSc in Health Research Methodology (McMaster University),
FRCPC and American Board in Internal Medicine (McMasterUniversity),
FRCPC in Gastroenterology (McMasterUniversity),
FRCPC and American Board in Critical Care Medicine (McMasterUniversity),
Clinical fellowship inEndoscopic Ultrasound (McMasterUniversity)

Academic Interests

Research interests focus on methodology of systematic reviews, meta-analyses, and clinical practice guideline development. Dr. Alhazzani is the lead methodologist on multiple international practice guidelines and professional societies (SCCM, ATS). Dr. Alhazzani is interested in conducting large simple (pragmatic) clinical trials on gastrointestinal disorders in critically ill patients.

Selected Publications

  1. Alhazzani W,Smith O, Muscedere J, Medd J, Cook D: Toothbrushing for critically ill mechanically ventilated patients: a systematic review and meta-analysis of randomized trials evaluating ventilator-associated pneumonia.Critical care medicine 2013, 41:646-655.
  2. Alhazzani W, Alenezi F, Jaeschke RZ, Moayyedi P, Cook DJ: Proton pump inhibitors versus histamine 2 receptor antagonists for stress ulcer prophylaxis in critically ill patients: a systematic review and meta-analysis.Critical care medicine 2013, 41:693-705.
  3. Alhazzani W, Alshahrani M, Jaeschke R, Forel JM, Papazian L, Sevransky J, Meade MO: Neuromuscular blocking agents in acute respiratory distress syndrome: a systematic review and meta-analysis of randomized controlled trials.Crit Care 2013, 17:R43.
  4. Alhazzani W, Jacobi J, Sindi A, Hartog C, Reinhart K, Kokkoris S, Gerlach H, Andrews P, Drabek T, Manzanares W, et al: The effect of selenium therapy on mortality in patients with sepsis syndrome: a systematic review and meta-analysis of randomized controlled trials.Critical care medicine 2013, 41:1555-1564.
  5. Alhazzani W, Lim W, Jaeschke RZ, Murad MH, Cade J, Cook DJ: Heparin thromboprophylaxis in medical-surgical critically ill patients: a systematic review and meta-analysis of randomized trials.Critical care medicine 2013, 41:2088-2098.
  6. Alhazzani W, Almasoud A, Jaeschke R, Lo BW, Sindi A, Altayyar S, Fox-Robichaud AE: Small bowel feeding and risk of pneumonia in adult critically ill patients: a systematic review and meta-analysis of randomized trials.Crit Care 2013, 17:R127.
  7. Rochwerg B, Alhazzani W, Sindi A, Heels-Ansdell D, Thabane L, Fox-Robichaud A, Mbuagbaw L, Szczeklik W, Alshamsi F, Altayyar S, et al: Fluid resuscitation in sepsis: a systematic review and network meta-analysis.Annals of internal medicine 2014, 161:347-355.
  8. Almenawer SA, Farrokhyar F, Hong C, Alhazzani W, Manoranjan B, Yarascavitch B, Arjmand P, Baronia B, Reddy K, Murty N, Singh S: Chronic subdural hematoma management: a systematic review and meta-analysis of 34,829 patients.Annals of surgery 2014, 259:449-457.
  9. Rochwerg B, Alhazzani W, Jaeschke R: Clinical meaning of the GRADE rules.Intensive care medicine 2014, 40:877-879.
  10. Badhiwala JH, Lai CK, Alhazzani W, Farrokhyar F, Nassiri F, Meade M, Mansouri A, Sne N, Aref M, Murty N, et al. Cervical spine clearance in obtunded patients after blunt traumatic injury: a systematic review. Annals of internal medicine.Mar 17 2015;162(6):429-437.