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Twenty-four (86%) had paediatric and 25 (89%) had adult congenital HTx services. National paediatric HTx centre density ranged from 0.00 to 5.35 per 10 million inhabitants. Eighteen (64%) countries followed either Eurotransplant or Scandiatransplant protocols for organ allocation and 59% of the surveyed countries had low HTx volumes (&lt;\u20094 paediatric HTx annually), based on the self-reported numbers. A ventricular assist device (VAD) programme was operational in 22 (79%) countries. In only 9 countries (38%), there were dedicated resources for HTx as part of the hospital budget; however, a vast majority (77%) reported that families suffered no cost when a VAD was utilised. Twenty-one countries (78%) reported limited intensive care unit beds and 14 (54%) reported that HTx impacted on congenital heart surgery cases. Only 12 of 27 countries (44%) had a standardised national protocol for post-HTx care. There was no correlation between paediatric HTx centre density, population or GDP per capita.<\/jats:p>\n                  <jats:p>\n                    <jats:italic>Conclusion<\/jats:italic>\n                    :\u00a0There is a high degree of variation both within and between the surveyed European countries with regard to paediatric HTx centre density, VAD availability, listing protocols, and post-HTx management. Multiple factors contribute to this heterogeneity, which makes standardisation of HTx listing and VAD criteria challenging. Increased cross-national collaborative efforts between European countries may strengthen both HTx and MCS availability and outcomes, especially in regions with several smaller neighbouring countries.\n                    <jats:table-wrap>\n                      <jats:table>\n                        <jats:tbody>\n                          <jats:tr>\n                            <jats:td colspan=\"2\">\n                              <jats:bold>What is Known:<\/jats:bold>\n                              \u2022\u00a0\n                              <jats:italic>The care of paediatric heart transplant (HTx) and mechanical support (MCS) patients varies across Europe.<\/jats:italic>\n                            <\/jats:td>\n                          <\/jats:tr>\n                          <jats:tr>\n                            <jats:td colspan=\"2\">\n                              <jats:bold>What is New:<\/jats:bold>\n                              \u2022\u00a0\n                              <jats:italic>This paper elucidates the differences in transplant service organisation and the care of transplant and MCS patients in twenty-eight European countries.<\/jats:italic>\n                              \u2022\u00a0\n                              <jats:italic>These findings could potentially encourage broader open dialogue and facilitate collaboration across European paediatric HTx centres with development of standardised listing criteria, improved collective European registry data and creation of standards for screening post-HTx patients.<\/jats:italic>\n                            <\/jats:td>\n                          <\/jats:tr>\n                        <\/jats:tbody>\n                      <\/jats:table>\n                    <\/jats:table-wrap>\n                  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