Can we safely expand the donation after circulatory death donor heart pool by extending the donor age limit?

Yeahwa Hong1, Nicholas R Hess1, Luke A Ziegler1

  • 1Department of Cardiothoracic Surgery at the University of Pittsburgh Medical Center, Pittsburgh, Pa.

Insights

Donation after circulatory death heart transplantation using donors aged 40 years or more shows similar survival rates to younger donors. Careful selection is key to expanding the donor pool and improving outcomes.

Area of Science:

  • Cardiology
  • Transplantation Medicine
  • Organ Donation

Background:

  • Organ shortage remains a critical challenge in heart transplantation.
  • Donation after circulatory death (DCD) offers a potential solution to expand the donor pool.
  • The impact of donor age on DCD heart transplant outcomes requires further investigation.

Purpose of the Study:

  • To evaluate the influence of donor age on outcomes after DCD heart transplantation.
  • To compare survival rates between recipients of DCD allografts from older versus younger donors.
  • To explore the role of recipient age in outcomes when using older DCD donors.

Main Methods:

  • Analysis of adult recipients undergoing isolated DCD heart transplantation (2019-2023) from the UNOS registry.
  • Stratification of donors into two groups: advanced age (≥40 years) and younger age (<40 years).
  • Propensity score matching and subgroup analysis based on recipient age were performed to assess 90-day and 1-year survival.

Main Results:

  • A total of 994 DCD heart transplants were analyzed; 17.1% involved donors aged ≥40 years.
  • Recipients of DCD allografts from advanced-age donors demonstrated similar 90-day and 1-year survival compared to those from younger donors.
  • Subgroup analysis revealed reduced 90-day survival in recipients aged ≥60 years who received allografts from advanced-age donors.

Conclusions:

  • Appropriately selected DCD donors aged 40 years or more can yield comparable early post-transplant survival to younger donors.
  • Utilizing older DCD donors, with careful recipient risk stratification, may help alleviate organ shortages.
  • This approach offers a promising strategy to improve heart transplant accessibility without compromising early outcomes.
Abstract