Waitlist management for patients at high risk such as those needing cardiac surgery is an ongoing challenge for clinicians and administrators in Canada and other countries with publicly funded health care systems, where access to these procedures is limited by surgical capacity. 1 The cardiac surgery waitlist has grown during the COVID-19 pandemic through lengthening wait times 2 and delayed disease presentation owing to missed cardiac specialist visits. 3,4 During the first wave of the pandemic, nonemergent cardiac procedures were deferred to ensure that sufficient resources were available to treat patients with COVID-19, 2 which created surgical backlogs around the globe. 5 As the pandemic evolves, evidence-based criteria are needed to facilitate timely and efficient resource allocation to address this surgical backlog.The growing backlog of patients with advanced cardiac disease needing surgery creates a dilemma for clinicians and administrators, as these patients require monitoring in the intensive care unit after surgery and may potentially compete with patients with severe COVID-19 for resources. Our group recently developed and externally validated the CardiOttawa LOS Score as an evidence-based decisionsupport tool to identify high and low users of intensive care unit resources after cardiac surgery. 6 However, safe triage decision-making goes beyond knowing patients' postoperative health care resource needs: it also requires an accurate estimation of the risks they will face in waiting for surgery.