1956 Nobel Prize in Physiology or Medicine: Cournand, Forssmann, and Richards – Probing the Heart

What You Will Learn

Learn how a 24-year-old German intern, Forssmann, demonstrated the principle of cardiac catheterization through an extreme self-experiment by inserting a catheter into his own heart, why this experiment was initially dismissed as reckless, and how Cournand and Richards from New York refined this method into a standard clinical diagnostic tool, leading to their shared Nobel Prize 27 years later.

Beyond the Textbook: How Do We Measure a Living Heart?

We typically imagine heart examinations as "listening with a stethoscope or measuring electrical signals with an electrocardiogram." While both are valid, to precisely measure the heart's actual mechanical performance – the pressure in each atrium and ventricle, the precise volume of blood flow, and the actual opening and closing of the valves – requires different tools.

The most precise tool is cardiac catheterization. A thin, flexible tube is inserted into a large vein or artery in the arm or thigh, and this tube is guided through the blood vessels to the heart. The tip of the tube contains pressure sensors, fluid injection ports, and contrast agent outlets, allowing for real-time measurements and imaging within the heart.

This procedure is now very common in clinical practice. Coronary angiography, evaluation of valve disease, and acute reperfusion therapy for myocardial infarction (stenting) all rely on this catheterization technique. However, when this method was first attempted in 1929, it was rejected by the scientific community as "reckless and dangerous self-experimentation."

In the language of CS, this can be described as inserting a live debugging probe into a production system. It is a tool that allows one to observe the values at specific points while the system is running, without stopping it. The power of this approach lies in its accuracy, but it also carries the risk of inserting the probe while the system is actually running. The trade-off between accuracy and risk permeates the entire story.

The Zeitgeist: A Year of Cracks in the Cold War

1956 was a year when the Cold War showed signs of fracturing in several areas.

In February, Khrushchev of the Soviet Union delivered a secret speech at the 20th Party Congress criticizing the cult of personality around Stalin. The leak of this speech triggered a reassessment of the Stalin era in the Eastern European satellite states. In October, an uprising broke out in Hungary. A non-Soviet government was briefly established before being suppressed by Soviet military intervention. At the same time, the Suez Crisis – Egypt's Nasser announced the nationalization of the Suez Canal, leading to an invasion by Britain, France, and Israel, followed by a withdrawal under pressure from the United States. This event confirmed the existence of new political forces outside the bipolar Cold War.

The Nobel Committee's decision to award the prize to these three individuals in that year held special significance. Forssmann, the German, had been ostracized by the scientific community after his 1929 self-experiment and was living as a rural GP. Cournand and Richards in New York were the ones who rediscovered his method and refined it into a clinical tool. Recognizing these three individuals together was an example of fairly distributing credit between the original discoverer and the team that made it practical.

In the context of Korean history, May 1956 saw Lee Syngman's fourth presidential election. While Lee Syngman was re-elected, the opposition candidate, Chang Myon, unexpectedly won the vice-presidential election. This marked the beginning of the weakening of Lee Syngman's political base.

Forssmann: The 24-Year-Old Who Inserted a Catheter into His Own Body

Werner Forssmann was born in Berlin, Germany, in 1904. In 1928, at the age of 24, he was training as a surgical intern at the Eberswalde Hospital near Berlin.

He was interested in finding a way to accurately deliver emergency drugs to the heart. At the time, drugs were administered directly to the heart through the chest wall in patients with cardiac arrest, a dangerous procedure. He believed that inserting a catheter into the heart through a vein would be much safer. He proposed this idea to his superiors, but they all rejected it, saying, "It is absolutely forbidden to try this on a patient."

His response was extreme. He decided to perform the experiment on himself, and convinced a surgical nurse to help him gain access to the operating room at night. The nurse initially offered to be the subject of the experiment, but Forssmann decided to perform the experiment on himself.

The experiment proceeded as follows. He made an incision in his left arm's radial vein and inserted a urethral catheter (designed for the urinary tract). He then guided the catheter through the vein in his arm, towards his shoulder, then into the subclavian vein, into the superior vena cava, and finally, about 65 cm, into the right atrium. With the catheter inside his heart, he walked to the radiology room and had an X-ray taken. The X-ray confirmed that the tip of the catheter was precisely in the right atrium.

He published the results of this experiment in a paper (1929, German Clinical Weekly). The response from the scientific community was very negative. The main criticisms were that it was "reckless self-experimentation," "an unrepeatable individual experiment," and "there is no basis for applying it to patients." As a result of this controversy, Forssmann was effectively ostracized by the scientific community and spent most of his life as a GP in a rural hospital.

Rediscovery in New York

Forssmann's paper was not completely forgotten. In the late 1930s, André Cournand, a young French cardiac physiologist, and Dickinson Richards, a clinician, at Columbia University's Bellevue Hospital in New York, reread his paper and recognized its potential as a clinical diagnostic tool.

The two men refined the method over the 1940s. They improved the catheter material, standardized the insertion technique, and established protocols for measuring pressure and oxygen saturation in various parts of the heart. During this period, they were particularly interested in the diagnosis of pulmonary hypertension, tuberculous heart disease, and congenital heart defects.

The power of catheterization became evident in these clinical settings. For example, congenital heart defects – such as atrial septal defects, ventricular septal defects, and tetralogy of Fallot – require measuring the pressure and oxygen saturation in various parts of the heart for accurate diagnosis. This information could not be obtained from auscultation or electrocardiography. Catheterization made this diagnosis practically possible, and subsequently supported the accurate planning of pediatric cardiac surgery.

By 1954, catheterization had become a fully established standard diagnostic tool in clinical practice. It was at this point that the Nobel Committee recognized Forssmann, the original discoverer of the method, along with Cournand and Richards, the team that made it practical. It was a belated recognition, 27 years later, but it was a decision that acknowledged the original discoverer.

The CS Framework of Self-Experimentation

Forssmann's actions were an extreme form of self-experimentation. How can this approach be organized using the language of CS?

When introducing a new probe into a production system, we usually first validate it in a test environment. This is the standard procedure to avoid risking actual users of the system. However, some tools have characteristics that cannot be reproduced in a test environment – when the size of the actual production, the diversity of actual users, or the physical characteristics of actual hardware are not available, the validation itself becomes meaningless.

Forssmann faced this situation. To confirm whether the catheterization method was safe in humans, it had to be tried on humans, but it was not ethically justifiable to perform this experiment on any patient (even by today's IRB standards). He chose to make himself the first subject of the experiment. While this choice violated the norms of the scientific community, it did maintain the principle that he was taking the risk to his own body.

Throughout history, there have been several medical researchers who have conducted self-experiments. Barry Marshall, who swallowed Helicobacter pylori in 1984 to demonstrate the bacterial cause of peptic ulcers, is a recent example (Nobel Prize in 2005). Self-experimentation is not a method that the scientific community fully accepts, nor does it fully reject it; it remains in an ambiguous area.

When we move to the world of CS, the same ambiguity exists. Developers performing risky experiments on their actual production systems (their company, their data) falls into this category. There are many bad examples, and there are also examples that have led to groundbreaking discoveries.

Why It Matters

The story of the three individuals leaves us with two themes: the "power of tools for observing live systems" and the "tension between scientific norms and individual insight."

In the first theme, catheterization is now at the heart of modern clinical cardiology. Percutaneous coronary intervention (PCI) is performed millions of times worldwide each year. Transcatheter aortic valve replacement (TAVR) has become the standard for replacing the aortic valve without open-heart surgery. Electrophysiological catheter ablation is the standard for treating arrhythmias. All of these procedures are rooted in Forssmann's 1929 self-experiment and Cournand and Richards' clinical refinement.

In the second theme, this story remains an example of an individual insight that was initially rejected by the scientific community but was later vindicated. While Forssmann's experiment clearly violated the norms of the scientific community, his insight was proven correct 27 years later with the Nobel Prize. This story reminds us that while not all norm violations are correct, norms are not perfect. Today's clinical research norms (IRB, informed consent) are much more sophisticated, but the possibility of new methods emerging in the gaps of the norms has not completely disappeared.

The Nobel Committee's decision to recognize the original discoverer 27 years later also has meaning. It demonstrates that the scientific community has a system that can correct its own past mistakes. Of course, 27 years is a long time, and Forssmann lost a significant portion of his scientific career during that time. The fact that he paid this price personally is also part of the story.

1956 Cournand, Forssmann, and Richards Summary: In 1929, 24-year-old intern Forssmann demonstrated the principle of cardiac catheterization by inserting a catheter into his own heart. After being ostracized by the scientific community, he lived as a rural GP. In the 1940s, Cournand and Richards, at Columbia University in New York, rediscovered his method and refined it into a clinical diagnostic tool. They were belatedly recognized with the Nobel Prize 27 years later. This is the foundation of today's coronary stenting, TAVR, and electrophysiological ablation.

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