I found this article interesting! From: http://www.novitatherapeutics.com/blog/werner-forssmann-urologist-nobel-prize-cardiology I've copied it here in case it gets deleted on the other site one day. Over the last several years I have become interested in learning where important ideas come from. This interest includes both relatively new ideas, such as ablating sympathetic nerves around the kidney in patients with high blood pressure using a catheter placed in the renal artery, and older ones such as the idea for catheterization itself. Last week I learned about Werner Forssman, who performed the first catheterization of the heart. I would like to share an excerpt from Dr. Forssman’s biography at Angioplasty.org: "In 1929 in a small hospital in Eberswald Germany Werner Forssmann, a young surgical resident, anesthetized his own elbow, inserted a catheter in his antecubital vein and, catheter dangling from his arm, proceeded to a basement x-ray room where he ...