RIYADH: King Faisal Specialist Hospital and Research Centre has successfully treated two children using a single donor heart in what it described as the first pediatric domino heart transplant of its kind in the Middle East and Europe, SPA reported. The donor heart was transplanted into a 12-year-old boy with end-stage heart failure, while the healthy pulmonary valve and root from his explanted heart were used to treat a second child, extending the benefit of a single donated heart to two patien