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| Human cardiac catheterization was introduced by Werner Forssman in | |
| 1929. Ignoring his department chief, and tying his assistant to an | |
| operating table to prevent his interference, he placed a urethral | |
| catheter into a vein in his arm, advanced it to the right atrium [of | |
| his heart], and walked upstairs to the x-ray department where he took | |
| the confirmatory x-ray film. In 1956, Dr. Forssman was awarded the | |
| Nobel Prize. |