Medical Terminology Daily - Est. 2012

Medical Terminology Daily (MTD) is a blog sponsored by Clinical Anatomy Associates, Inc. as a service to the medical community. We post anatomical, medical or surgical terms, their meaning and usage, as well as biographical notes on anatomists, surgeons, and researchers through the ages. Be warned that some of the images used depict human anatomical specimens.

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A Moment in History

Jean George Bachman

Jean George Bachmann
(1877 – 1959)

French physician–physiologist whose experimental work in the early twentieth century provided the first clear functional description of a preferential interatrial conduction pathway. This structure, eponymically named “Bachmann’s bundle”, plays a central role in normal atrial activation and in the pathophysiology of interatrial block and atrial arrhythmias.

As a young man, Bachmann served as a merchant sailor, crossing the Atlantic multiple times. He emigrated to the United States in 1902 and earned his medical degree at the top of his class from Jefferson Medical College in Philadelphia in 1907. He stayed at this Medical College as a demonstrator and physiologist. In 1910, he joined Emory University in Atlanta. Between 1917 -1918 he served as a medical officer in the US Army. He retired from Emory in 1947 and continued his private medical practice until his death in 1959.

On the personal side, Bachmann was a man of many talents: a polyglot, he was fluent in German, French, Spanish and English. He was a chef in his own right and occasionally worked as a chef in international hotels. In fact, he paid his tuition at Jefferson Medical College, working both as a chef and as a language tutor.

The intrinsic cardiac conduction system was a major focus of cardiovascular research in the late nineteenth and early twentieth centuries. The atrioventricular (AV) node was discovered and described by Sunao Tawara and Karl Albert Aschoff in 1906, and the sinoatrial node by Arthur Keith and Martin Flack in 1907.

While the connections that distribute the electrical impulse from the AV node to the ventricles were known through the works of Wilhelm His Jr, in 1893 and Jan Evangelista Purkinje in 1839, the mechanism by which electrical impulses spread between the atria remained uncertain.

In 1916 Bachmann published a paper titled “The Inter-Auricular Time Interval” in the American Journal of Physiology. Bachmann measured activation times between the right and left atria and demonstrated that interruption of a distinct anterior interatrial muscular band resulted in delayed left atrial activation. He concluded that this band constituted the principal route for rapid interatrial conduction.

Subsequent anatomical and electrophysiological studies confirmed the importance of the structure described by Bachmann, which came to bear his name. Bachmann’s bundle is now recognized as a key determinant of atrial activation patterns, and its dysfunction is associated with interatrial block, atrial fibrillation, and abnormal P-wave morphology. His work remains foundational in both basic cardiac anatomy and clinical electrophysiology.

Sources and references
1. Bachmann G. “The inter-auricular time interval”. Am J Physiol. 1916;41:309–320.
2. Hurst JW. “Profiles in Cardiology: Jean George Bachmann (1877–1959)”. Clin Cardiol. 1987;10:185–187.
3. Lemery R, Guiraudon G, Veinot JP. “Anatomic description of Bachmann’s bundle and its relation to the atrial septum”. Am J Cardiol. 2003;91:148–152.
4. "Remembering the canonical discoverers of the core components of the mammalian cardiac conduction system: Keith and Flack, Aschoff and Tawara, His, and Purkinje" Icilio Cavero and Henry Holzgrefe Advances in Physiology Education 2022 46:4, 549-579.
5. Knol WG, de Vos CB, Crijns HJGM, et al. “The Bachmann bundle and interatrial conduction” Heart Rhythm. 2019;16:127–133.
6. “Iatrogenic biatrial flutter. The role of the Bachmann’s bundle” Constán E.; García F., Linde, A.. Complejo Hospitalario de Jaén, Jaén. Spain
7. Keith A, Flack M. The form and nature of the muscular connections between the primary divisions of the vertebrate heart. J Anat Physiol 41: 172–189, 1907.


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This article is part of the series "A Moment in History" where we honor those who have contributed to the growth of medical knowledge in the areas of anatomy, medicine, surgery, and medical research.

Folder of "Sutures in Ancient Surgery"
Folder of "Sutures in Ancient Surgery"

During a recent 2024 lecture I delivered to a group of engineers at Medtronic, I met with Jack Kennedy, an engineer, past student, and a good friend. Jack and I share a passion for medical history. He has a very interesting collection of antique sutures and books related to the topic. He gifted me a collection of antique photographic prints in a leather-like folder with gilded letters. The name of the work is “Sutures in Ancient Surgery”. Jack was kind enough to sign and dedicate this gift that now holds an important place in my library.

For those who know me, I cannot have a book without looking into its history. What I found was incredible! The findings are in the following areas and topics:

  1. The history of the Davis and Geck suture company.
    2. Lejaren à Hillier, main photographer of “Sutures in Ancient Surgery”
    3. The content of the publication, images, and controversy
    4. Missing prints

    1. The history of the Davis & Geck company

Davis & Geck (D&G) was founded in 1909 by Charles T. Davis and Fred A. Geck, along with Frank D. Bradeen, and Benjamin F. Hirsch. Interestingly, Fred Geck left the company only a few months after its formation, but the company kept his name.

Located in Brooklyn, NY., the company specialized in the development and manufacture of surgical sutures along with various other medical products. Over the years the company changed ownership and has changed its name a couple of times. In 1930, the company was acquired by American Cyanamid after a trial between Charles Davis and his wife. This particular spot in the company’s history includes a murder, prison, lovers, and a trial. If you are interested, read the story of the company at UConn’s and SNAC web pages (see “sources”).

D&G was acquired by Sherwood, and later by the Tyco Corporation where it was renamed Syneture. Tyco Healthcare became Covidien, Ltd., which was later acquired by Medtronic, where it is today.

In 1970 Davis & Geck introduced Dexon, the first synthetic absorbable suture, followed shortly by Ethicon (J&J) sutures with Vicryl. Since then, research and development in the Medtronic line of sutures makes this company one of the world leaders in wound closure.

2. Lejaren à Hillier, main photographer of “Sutures in Ancient Surgery”

Lejaren à Hillier (1880-1969), was born in Milwaukee. He studied at the School of the Chicago Art Institute; his interest was classical fine arts. His studies and activities drew him to experimenting with photography and novel techniques for the times, where he mixed photography and painting. He became a famous commercial photographer.

One of his most exciting works was that of “tableaux vivants” (living portraits), where he would stage actors and innovative lighting techniques to represent scenes that he would later edit with paintings or use different photographic development techniques to obtain the appropriate mood. His work soon caught the attention of companies that used these tableaux vivants in commercial printings for brochures or newspapers.

Hillier was approached by D&G and the project of “Sutures in Ancient Surgery” was born. Starting in 1927 and all trough 1950, D&G sales representatives would present their customers (physicians and surgeons) with the “latest” image, ensuring an open door when they showed up at the doctor’s office. The doctors were also presented with a leather-like folder to maintain their collection. The number of prints varied each year, and it is interesting to note that none were published during the long years of WWII.

According to JTH Connor, a total of eighty three portraits were published. These show medical scenes that range from prehistory, trough Egypt, Greece, Rome, the Middle Ages, the Renaissance, all the way to the 19th century. The list of individuals portrayed is itself worth of research, as all of them in one way or another influenced medicine and surgery. Albucasis, Avicenna, Celsus, Fallopius, Fabricius, Galen, Harvey, Hunter, Rhazes, and Vesalius are but some of the tableaux vivants created for D&G.

Hillier was criticized for the lack of accuracy in some of the portraits as well as the person depicted, but the ideas for the topics were not his. The consultant used by D&G to suggest the topics was Samuel Harvey (1886-1953), who himself studied under the tutelage of famous neurosurgeon and medical historian Harvey Cushing (1869-1939).

Some of the images were later published in a book by Hillier (“Surgery through the ages”, 1944) showing other tableaux made for other medical publications.

Lejaren à HillierLejaren à Hillier

Title page of "Surgery through the ages" by HillierTitle page of "Surgery through the ages" by Hillier

This article continues here: The interesting story of “Sutures in Ancient Surgery (2)"