The doctor who became his own experiment.

Here's the strange part.

In 1929, Werner Forssmann tested cardiac catheterisation on himself and had an X-ray taken to document it. The episode became part of the history of the technique, but the headline leaves out a very important distinction: a remarkable historical risk is not a sensible modern challenge. Read it as history, never as instructions. (Heart / BMJ Journals (PMC))

Go straight to the receipts.

Curious about the methods, dates or details? Open the original source and keep the caveat in view.