Impact of the United Network for Organ Sharing allocation criteria changes on temporary mechanical circulatory support use as a bridge to transplant

Table 3 Currently identified attributes as well as attributes in discussion in the 2024 OPTN concept paper for continuous allocation system for heart transplant

	Medical urgency	Post-transplant survival	Candidate biology	Patient access	Placement efficiency
Currently identified attributes	Type of tMCS; Inotrope use; LVAD use; HCM, RCM, CHD; Re-Tx; IHD w angina; Multi-organ Tx		Blood type; Sensitization using CPRA	Pediatric recipients; Prior living organ donors	Geographic proximity; Proximity efficiency
Attributes still in discussion	Waiting time accrued with an LVAD (increased risk of complications with time)	Post-transplant survival metric	Abnormal stature

HCM: Hypertrophic cardiomyopathy; RCM: Restrictive cardiomyopathy; Tx: Transplant; IHD: Ischemic heart disease; CPRA: Calculated panel reactive antibody.