ray film in 1956 quotes

Human cardiac catheterization was introduced by Werner Forssman in 1929.
Ignoring his department chief, and tying his assistant to an operating
table to prevent her interference, he placed a ureteral 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.