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Figure 3 The Number of UNOS Status 1 and 2 Heart Transplant Candidates Listed in the U.S.: Years 1990–2005

The number of the United Network of Organ Sharing (UNOS) status 1 candidates listed for heart transplantation in the U.S. increased from 836 patients in year 1990, to 1,159 patients in year 2005. During the same period of time the number of patients listed as UNOS status 2 decreased from 2,332 patients listed in year 1990 to 1,147 patients listed in year 2005. These trends were associated with an increased proportion of the listed-to-transplanted heart transplant candidates per calendar year from 41% in year 1990 to 77% in year 2005 (red line).