During World War II Werner Forssmann is appointed medical officer for surgery. He works at the military hospitals in Poland, Norway, Denmark and Russia until he returns to Robert Koch Clinic at Berlin in October of 1942. He becomes chief of the City Hospital Potsdam in April of 1943 and works at the military hospital Neuruppin during the last years of war. Until October of 1945 he´s an American prisoner of war. Later, he returns to his family, now living in the Black Forest.

After his State Examination Werner Forssmann gets his clinical training at the University Medical Clinic. He earns his PhD with a thesis about the influence of liver extract on blood chemistry in 1929. This is his first self-experiment: he drinks one liter a day of the extract.

In 1929 Werner Forssmann gets a job at the August Victoria Clinic at Eberswalde (now Werner Forssmann Clinic). Afterwards he works at the Charité in Berlin, where he´s dismissed due to plagiarism accusations. Forssmann returns to Eberswalde, where he performs gynecological examinations. Subsequently, he´s fetched back to the Charité by the chairman Ferdinand Sauerbruch. There he works as volunteer, surgeon and locum doctor until 1932.

At the Clinic at Eberswalde Werner Forssmann develops a method for the cardiac catheterization. In a self-experiment he anaesthetises his lower arm, inserts a cannula into his antecubital vein and passes a catheter for 65cm right in his right auricle. He walks to the X-ray department and a photograph proofs the catheter lying in his heart. Forssmann´s self experimentation doesn´t gain recognition at all.

Werner Forssmann and Elisabeth Engel get together at the City Hospital at Mainz and get married in December of 1933. They have five sons and one daughter.

Werner Theodor Otto Forssmann is born to his parents Julius Forssmann and Emmy Hindenberg in Berlin, Germany. When Werner is twelve years old, his father Julius falls in World War I (1916).

Werner Forssmann enters University of Berlin to study medicine in 1922. He passes his State Examination in 1928.

After his retirement in 1969 Werner Forssmann writes his autobiography, which is published in 1972. Living in Wies-Wambach he dies on 01. June of 1979.

Werner Forssmann is jointly with André Frédéric Cournand and Dickinson W. Richards awarded the 1956 Nobel Prize in Medicine or Physiology for their discoveries concerning heart catheterization and pathological changes in the circulatory system.

Werner Forssmann enrolls Askanisches Gymnasium in Berlin, where he graduates in 1922.

In 1958 Werner Forssmann becomes Chief of the Surgical Department of the Evangelical Hospital at Düsseldorf. He holds this position until his retirement in 1969.

After the war Werner Forssmann works first as lumberjack until he gets a position as a urological specialist at Bad Kreuznach in 1950. His interests in cardiology still disappeared for a long time, so he doesn´t realize the research on cardiac catheterization done by André Frédéric Cournand, which are based on his own work.

Between 1932 and 1939 Werner Forssmann works in different positions in various cities: surgeon assistant doctor at the City Hospital at Mainz (1932-1933), assistant medical director of the urological department at the Rudolf-Virchow-Clinic at Berlin (1933-1936), assistant medical director at the City Hospital at Dresden (1936-1937), surgeon assistant medical director at the Robert Koch Clinic at Berlin (1937-1939).