Answer
Philip Blaiberg, a 58-year-old dentist, became Barnard's second heart transplant patient on January 2, 1968, just over a month after Louis Washkansky's groundbreaking surgery. Blaiberg survived for 19 months after his transplant, a significant improvement over Washkansky's 18 days. Blaiberg's extended survival demonstrated the potential of heart transplantation as a viable treatment for end-stage heart failure.