Dr Walt Lillehei, M.D.
Born in Minnesota, Dr. Lillehei earned his doctorate in surgery at the university of his hometown in 1951.
The Challenge of Open-Heart Surgery
In the early 1950s, the medical world was still searching for a technique to perform open-heart surgery while maintaining oxygen delivery to the organs.
Hypothermia, which allowed the circulation to be stopped for only a few minutes, did not provide enough time to perform complex operations.
Dr. Lillehei then assembled a team to take on this challenge.
An Idea Inspired by Nature
The starting point came from observing the fetus: in the womb, oxygenation occurs through the mother’s circulation, without passing through the lungs. The placenta, firmly attached to the uterus, is a highly vascularized structure; a cord composed of veins and an artery carries away carbon dioxide (CO₂) and delivers oxygen to the fetus’s bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood.
This mechanism inspired Dr. Lillehei and his team with the bold idea of reproducing the principle outside the womb: connecting a patient with congenital heart disease to the circulation of their mother or father during the operation. What works in the womb might also work outside of it!
Developing “Cross-Circulation”
To put this idea into practice, Dr. Lillehei’s team obtained plastic tubing and a roller pump. This device works by a rotating wheel compressing the blood-filled tube in a rhythmic, adjustable way to push the bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood forward.
This method had two major advantages: the bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood never touched mechanical parts, reducing the risk of clotting or infection, and the tubes could be discarded after use, ensuring better sanitary safety.
The First Animal Trials
The first experiment was carried out on two dogs: one served as the donor and the other as the recipient. Both were anesthetized and connected by the pump for 30 minutes. The donor’s bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood was entirely diverted to a vein in the recipient, allowing the donor’s heart to be stopped temporarily so cardiac surgery could be performed. Oxygenated blood from the recipient then returned to the operated animal through an artery.
When they awoke, both dogs were in good health: the trial was deemed a success, confirming the feasibility of this innovative approach.
Encouraged by this success, the team went further, creating a model for cardiac repair: a hole was made between the two ventricles of the recipient dog’s heart. After setting up the donor dog and connecting the pump, the ventricular septum was repaired in 24 minutes.
Once again, both animals recovered without apparent complications.
First Human Procedure: Gregory Gitten
In March 1954, Dr. Lillehei prepared to perform a world first: repairing a ventricular septal defect (VSD) in a two-year-old boy, Gregory Gitten.
- Ethical Debate
The procedure relied on “cross-circulation,” a method that temporarily connected the patient to a parent’s circulation. This placed not one but two lives at risk: the young patient and the healthy donor. The combined mortality risk was estimated at 200%, a figure that shocked many and triggered intense ethical debate.
Opponents argued that such an intervention, even in a life-or-death situation, might be morally unacceptable. Supporters countered that without it, the child faced certain death.
- Permission to Proceed
After lengthy discussions and strong support, the hospital granted exceptional authorization. The operation went ahead as planned: the VSD was closed, and both Gregory and his mother donor initially left the operating room unharmed.
- Death from Complication
Unfortunately, the victory was short-lived. Two weeks later, Gregory developed a severe pneumonia. At that time, antibiotics and respiratory infection treatments were limited, especially for children weakened by major surgery.
The infection progressed rapidly, and despite all efforts, Gregory’s condition worsened. He passed away, leaving behind a grieving surgical team and a mother who, days earlier, had risked her life to save her son.
This tragic outcome did not erase the historical significance of the procedure. For the first time, a complex heart defect had been repaired with open-heart surgery using cross-circulation between two human beings. This achievement, though marked by loss, paved the way for new techniques and continued research that would transform cardiac surgery.
The Case of Annie Brown
Shortly after the first human procedure, another couple consulted Dr. Lillehei. Their four-year-old daughter, Annie Brown, had a large ventricular septal defect. With each heartbeat, some oxygenated bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood passed from the left ventricle into the right ventricle, overloading the pulmonary circulation.
This caused excessive bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood flow to the lungs, leading to repeated infections and threatening her life in the short term.
Annie had been hospitalized multiple times for severe pneumonia. Tests showed her father was the only compatible donor for cross-circulation. The surgery, initially planned, had to be postponed due to yet another lung infection.
- A Successful Surgery, But Not Without Suspense
When the operation finally took place, Annie was connected to her father’s circulation and her heart was opened. The hole in the ventricular septum was located and sutured. But as the heart was closed, a complication arose: the heartbeat resumed, but extremely slowly. A complete heart block interrupted electrical conduction to the ventricles, likely caused by a suture placed near the conduction system. At that time, pacemakers did not yet exist to address such a crisis.
After 90 long seconds, the normal rhythm returned spontaneously, averting disaster. Father and daughter awoke without immediate complications. Recovery was smooth, and Annie returned home free of the heart defect that had threatened her future.
Results and Complications
In nine weeks, seven patients were operated on using this method: only one survived without sequelae, while the others died or suffered a stroke.
Despite this, Dr. Lillehei succeeded in the first repair of a Tetralogy of Fallot.
Cross-circulation was eventually abandoned in favor of other techniques.
Legacy
Dr. Walt Lillehei died on July 5, 1999, at the age of 80.
A bold pioneer, he helped open the way to modern cardiac surgery.
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