Table 3.

United Network of Organ Sharing (UNOS) medical urgency codes.

Status	Clinical Criteria
1A	Mechanical circulatory support (MCS) (ventricular assist device [VAD] <30 days; total artificial heart; intraaortic balloon pump; extracorporeal membrane oxygenation) MCS with device-related complications Continuous mechanical ventilation Continuous infusion of multiple intravenous inotropic agents or a single agent at high-dose (dobutamine ≥ 7.5mcg/kg/min or milrinone ≥ 0.5 mcg/kg/min) with invasive hemodynamic monitoring (pulmonary artery catheterization) Life expectancy <7 days
1B	VAD implanted Continuous intravenous inotrope infusion
2	Does not meet criteria for Status 1A/1B
7	Temporarily inactive (unsuitable)