Who performed the first human cardiac catheterization?

The first human cardiac catheterization was performed by Dr. Werner Forssmann in 1929. He conducted the procedure on himself by inserting a catheter into his own heart through a vein in his arm, which demonstrated the feasibility of the technique. This groundbreaking work laid the foundation for modern cardiac catheterization and helped advance the field of cardiology. Forssmann was awarded the Nobel Prize in Physiology or Medicine in 1956 for his pioneering contributions.