Question: Who performed the first successful human heart operation?
Disambiguated questions and answers: question: Who performed the first successful human heart transplant operation?
Who performed the first successful human heart valve operation?
Who performed the first successful palliative pediatric human heart operation?
Who performed the first successful human open heart operation?
answer: Barnard
Christiaan Neethling Barnard
Christiaan Barnard
Henry Souttar
Souttar
Sir Henry Sessions Souttar
Helen Taussig
Vivien Thomas
Alfred Blalock
Alfred Blalock, Helen Taussig, and Vivien Thomas
John Heysham Gibbon Jr.
Gibbon
John Heysham Gibbon
Natural Questions answer: Christiaan Neethling Barnard (from the Wikipedia article "Christiaan Barnard")