TO REACH THE HEART:
CARDIAC CATHETERIZATION
In the operating room of a provincial Red Cross hospital in Eberswald, Germany, on an afternoon in 1929 a young intern, Werner Forssmann, stood behind the operating table, where a surgical nurse, Gerda Ditzen, was lying, unable to see him. Forssmann injected novocaine into his right elbow area, made a small incision, and
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Werner Forstmann (Wikipedia) |
inserted a needle through which he threaded a narrow ureteral catheter, 65 cm long, pushing it up a vein to the level of his shoulder. The nurse had initially volunteered for the catheterization and was awaiting the procedure, but Forssmann, having used her primarily to access the operating room, catheterized himself instead.
To document the catheter’s position, Forssmann, catheter in place, and the nurse, furious but curious, headed down a flight of stairs to the X-ray room. Behind a fluoroscope, Forssmann viewed his thorax in a mirror held by Gerda as he pushed the catheter up until it reached his right atrium. Another doctor burst into the room, enraged, and tried to pull out the catheter, but the technician had already taken a few shots.
The general surgeon supervising Forssmann, Dr. Richard Schneider, had previously refused a request by Forssmann to perform the catheterization either on himself or a moribund patient and was now obliged to discharge him. Schneider saw, however, the importance of the experiment and helped Forssmann write a paper, published by the prestigious Klinische Wochenschrift.
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X-ray published in Klinische Wochenschrift, 1929, of Forssmann with first documented catheter placement. See reference below. (Courtesy Hathi Trust) |
Forssmann had prepared himself. As a student, he learned that French physiologists had catheterized animals for years without ill effects. Claude Bernard, for example, to settle an argument about whether most of the metabolism of the body (and the source of heat) took place in the lungs, the opinion favored by Lavoisier, or in peripheral tissues, the idea promoted by Gustav Magnus (who had shown that venous blood contained more CO2 and less oxygen than
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Claude Bernard (Wikipedia) |
arterial blood). Bernard, using horses and dogs, introduced thermometers on catheters through the carotid artery into the left ventricle and through the jugular vein into the right heart, confirming a temperature difference that favored Magnus’ opinion.
To settle arguments over the timing of the contractions of atria and ventricles a veterinary physiologist, A. Chauveau, and a Parisian physician interested in blood pressure, E. J. Marey (see last month’s essay), had also introduced catheters into animal hearts to produce tracings of the timing and the force of the contractions.
Additionally, Adolf Fick, a German physiologist in Würzburg, established in 1870 a formula for determining cardiac output: the amount of oxygen taken up by the lungs per unit time divided by the difference between arterial and venous contents of oxygen. This required the simultaneous collection of mixed venous and arterial blood coupled with measurements of gas exchange in the lungs. Mixed venous blood is found in the right atrium.
In Forssmann’s 1929 report he claimed that he had first tried catheterization on a cadaver and that a colleague had introduced the catheter into his arm but became uneasy and refused to continue, obliging Forssmann to finish the attempt alone. Both statements were false, as documented by the medical reporter, Lawrence Altman. It was a true self-experiment without preliminary trials. The medical community missed the significance of catheterization, however. His action aroused severe criticism and his surgical career suffered. Undeterred, a short time later Forssmann reported self-injections of contrast material through a catheter into his right heart to visualize the chambers. The medical community had little reaction. Overall, Forssmann catheterized himself nine times.
Catheterization efforts were few and far between for several years. A young French physician, André Cournand, aiming to
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André Cournand (Wikipedia) |
practice pulmonary medicine, enrolled in 1932 as a resident on the Columbia Chest Service of Bellevue Hospital in New York. While there, he accepted an offer from Dickinson Richards to collaborate on research on pulmonary gas exchange.
Richards, a graduate of Columbia’s College of Physicians and Surgeons, had begun a career in pulmonary physiology. He and Cournand, studying emphysema, established abnormalities in the mixing of gases but for precision needed to measure blood flow through the lungs, a step requiring samples of right atrial blood. Cournand consulted a colleague in France, Pierre Ameuille, who had catheterized the right heart in over
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Dickinson Richards (Wikipedia) |
100 cases, introducing contrast solution to visualize the pulmonary circulation. Cournand reviewed the cases and, after trials in animals, he and Richards proceeded gingerly, in 1941, to catheterize humans.
War influenced all three men. Forssmann had joined the Nazi party and served in WWII, spending three years near the eastern front treating wounded soldiers. After the war, barred from hospital posts as a former member of the Nazi party, he practiced urology in a small town. Cournand, when a first-year medical student, served in WWI as a medic, applying first aid and retrieving wounded from no-man’s-land between trenches. The two, from former enemy countries, first met in 1952 and Cournand later wrote the introduction to Forssmann’s autobiography.
Richards served in WWI as an artillery officer and during WWII he and Cournand, using cardiac catheterization, worked on the wartime problem of the physiology of shock. The three shared the Nobel Prize in 1956 for their contributions to cardiac catheterization. Research seemed to be a criterion for the prize. As the Nobel Committee, speaking of Cournand and Richards, put it: “…the main point was that a well-known research group at a distinguished clinic had set their seal of approval on the method, which then made its triumphant entry into the world of clinical medicine.”
Cardiac catheterization is now a routine procedure, essential for modern cardiology and cardiac surgery.
SOURCES:
Weibel ER, “Andre Frederic Cournand, 1895-1988: A Biographical Memoir.” Nat Acad Sci, Biographical Memoirs, 1995.
Cournand A F and Ranges HA, “Catheterization of the Right Auricle in Man.” Proc Soc Exptl Biol Med 1941; 46: 462-6.
Buzzi A, “Claude Bernard on Cardiac Catheterization,” Amer J Cardiol 1959; 28: 405-9.
Altman L, Who Goes First: The Story of Self-Experimentation in Medicine. 1987, Random House.
Ameuille P, et al, “Remarques sur Quelques Cas d’Artériographie Pulmonaire chez l’Homme Vivant.” Le Concours Médical 1936; 58: 3308. (The report contains little information of a physiologic nature.)
Forssmann W, Experiments on Myself: Memoirs of a Surgeon in Germany. New York: St. Martin’s Press; 1974.
Cournand A F, From Roots to Late Budding: The Intellectual Adventures of a Medical Scientist. Gardner Press, N.Y; 1986
Cournand A F, “Cardiac Catheterization.” Acta Medica Scandinavica 1975; 198 (issue S579): 7-32. (A history of cardiac catheterization).
A full index of past essays is available at:
https://museumofmedicalhistory.org/j-gordon-frierson%2C-md