Louis Henri Vaquez
Encyclopedia
Louis Henri Vaquez was a French physician who practiced medicine in Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

.

In 1890 he earned his medical doctorate, and in 1898 became professeur agrégé. In 1918 he was appointed professor of clinical medicine and elected a member of the Academy of Medicine. Cardiologist Pierre Potain
Pierre Potain
Pierre Charles Édouard Potain was a French cardiologist born in Paris.In 1853 he earned his doctorate from the University of Paris, and afterwards worked as an assistant to Jules Baillarger at the mental asylum at Ivry...

 (1825-1901) was an important influence in his medical career.

Vaquez is remembered for his work in the field of hematology
Hematology
Hematology, also spelled haematology , is the branch of biology physiology, internal medicine, pathology, clinical laboratory work, and pediatrics that is concerned with the study of blood, the blood-forming organs, and blood diseases...

 and his research of heart disease
Heart disease
Heart disease, cardiac disease or cardiopathy is an umbrella term for a variety of diseases affecting the heart. , it is the leading cause of death in the United States, England, Canada and Wales, accounting for 25.4% of the total deaths in the United States.-Types:-Coronary heart disease:Coronary...

. In 1892 he was the first to describe the blood disorder polycythaemia vera, which is also known as "Osler-Vaquez disease" (named with William Osler
William Osler
Sir William Osler, 1st Baronet was a physician. He was one of the "Big Four" founding professors at Johns Hopkins Hospital as the first Professor of Medicine and founder of the Medical Service there. Sir William Osler, 1st Baronet (July 12, 1849 – December 29, 1919) was a physician. He was...

 (1849-1919). He was among the first physicians to recognize the correlation of Stokes-Adams attack
Stokes-Adams attack
Stokes–Adams syndrome refers to a sudden, transient episode of syncope, occasionally featuring seizures. It is named after two Irish physicians, Robert Adams and William Stokes .-Signs and symptoms:...

 to interference of the bundle of His
Bundle of His
The bundle of His, known as the AV bundle or atrioventricular bundle, is a collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex of the fascicular branches...

 causing a discordant beating of the atria in relation to that of the ventricles
Ventricle (heart)
In the heart, a ventricle is one of two large chambers that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs. The Atria primes the Pump...

. He also performed research involving cardiac arrhythmia and high blood pressure.

Vaquez was founder and editor of the journal Archives des maladies du coeur, vaissaux et du sang.
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