Carl Nothnagel
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Carl Wilhelm Hermann Nothnagel (September 28, 1841 - July 7, 1905) was a German internist who in 1876 described the irregular pulse associated with atrial fibrillation. At the time he referred to this discovery as "delirium cordis".
From 1858 until 1863 Nothnagel studied under Ludwig Traube (1818-1876) and Rudolf Virchow (1821-1902) at the Friedrich Wilhelms-Institut in Berlin. After receiving his doctorate, he spent part of his early career as a military physician, including a stint in the Franco-Prussian War. From 1882 until 1905, he was a professor at the university clinic in Vienna. In collaboration with other physicians, Nothnagel published Handbuch der speciellen Pathologie und Therapie, a comprehensive 24-volume handbook of medicine.
The eponymous Nothnagel's syndrome is named after him. This condition is a combination of oculomotor palsy and cerebellar ataxia caused by a lesion affecting the oculomotor nucleus and cerebellar peduncles (stalk-like band of neurons).