Daoud Hanania performed the first open-heart surgery procedure in Jordan in 1970, the first heart-valve replacement in the country in 1972 as well as the first kidney transplant in the Arab world in the same year and the first coronary artery bypass in Jordan in 1973 and in Iraq some years later. But his most important achievement came in 1985 after performing the first ever successful cardiac transplant in the Middle East and the Arab world at the King Hussein Medical Center in Amman, Jordan.