János Oscar Plesch (18 November 1878 – 28 May 1957) was a Hungarian academic pathologist,

physiologist Physiology (; ) is the scientific study of functions and mechanisms in a living system. As a subdiscipline of biology, physiology focuses on how organisms, organ systems, individual organs, cells, and biomolecules carry out chemical and ...

, and physician. Plesch was well known internationally for his clinical research on

blood circulation In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. It includes the cardiovascular system, or vascular system, that consists of the heart an ...

. He also invented the first convenient device for taking blood pressure. Plesch was a close friend and doctor to

Albert Einstein Albert Einstein (14 March 187918 April 1955) was a German-born theoretical physicist who is best known for developing the theory of relativity. Einstein also made important contributions to quantum mechanics. His mass–energy equivalence f ...

for 25 years. Plesch's autobiography contains two chapters on Einstein. Plesch lived in Berlin for much of his early working life. As a Jew, he left Germany after the

Nazi Party The Nazi Party, officially the National Socialist German Workers' Party ( or NSDAP), was a far-right politics, far-right political party in Germany active between 1920 and 1945 that created and supported the ideology of Nazism. Its precursor ...

took control and moved to England where he was required to re-qualify as a medical doctor. In the UK, Plesch became the physician to the economist

John Maynard Keynes John Maynard Keynes, 1st Baron Keynes ( ; 5 June 1883 – 21 April 1946), was an English economist and philosopher whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments. Originall ...

and was credited with helping Keynes to survive heart attacks and declining health through his skilled medical treatment. Plesch's son, Peter, was an art collector.

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János Plesch and Albert Einstein
{{DEFAULTSORT:Plesch, Janos 1878 births 1957 deaths Emigrants from Austria-Hungary to Germany German emigrants to the United Kingdom