Friedrich Ludwig Kreysig

Friedrich Ludwig Kreysig (7 July 1770 – 4 June 1839) was a German physician born in Eilenburg.

[1] In 1803 he was appointed personal physician to Frederick Augustus, and from 1815 served in Dresden as a trainer of Saxon military doctors.

For health reasons, he left academic work in 1822, retiring to a private practice, from which he concentrated on botanical studies.

[2] With physician Ernst Ludwig Heim (1747–1834), the "Heim-Kreysig sign" is named, which in adherent pericardium, an in-drawing of the intercostal space occurs, synchronous with the cardiac systole.

[3] In 1828, he was elected a foreign member of the Royal Swedish Academy of Sciences.