1A: Adult - Registrant at least 18 years of age, admitted to listing hospital with at least one of the following: (a) mechanical circulatory support for acute hemodynamic decompensation with VAD 30 days or less, TAH, balloon pump, or ECMO; (b) mechanical circulatory support for more than 30 days with objective medical evidence of significant device-related complications; (c) mechanical ventilation; (d) continuous infusion of a single high-dose intravenous inotrope or multiple intravenous inotropes, in addition to continuous hemodynamic monitoring of left ventricular filling pressures; or (e) meets none of the criteria specified above but admitted to the listing hospital with a life expectancy without a heart transplant of less than seven days.

Pediatric - Registrant less than 18 years of age and meets at least one of the following criteria: (a) requires assistance with a ventilator; (b) requires assistance with a mechanical assist device; (c) requires assistance with a balloon pump; (d) is less than 6 months old with congenital or acquired heart disease exhibiting reactive pulmonary hypertension at greater than 50% of systemic level; (e) requires infusion of high dose or multiple inotropes; or (f) meets none of the criteria specified above but has a life expectancy without a heart transplant of less than 14 days.

1B: Adult - A registrant who (a) has a left and/or right ventricular assist device implanted for more than 30 days; or (b) receives continuous infusion of intravenous inotropes.

Pediatric - A registrant who (a) requires infusion of low dose single inotropes, (b) is less than 6 months old and does not meet the criteria for Status 1A, or (c) exhibits growth failure (see OPTN policies for definition).

2: A patient of any age who does not meet the criteria for Status 1A or 1B.

7: Temporarily inactive.