Russell M. Nelson
Heart surgeon He worked on a team that developed the first machine that could perform the functions of a patient’s heart and lungs during heart surgery. In 1951, the machine performed well in the first open-heart operation on a human being. Four years later, he performed the first successful open-heart surgery using a heart-lung machine in Salt Lake City, making Utah the third state in the nation to reach this important milestone.
Source: “Elder Russell M. Nelson: Applying Divine Laws” by Marvin K. Gardner Ensign, June 1984, page 9.