A heart surgery in progress at National Jewish Hospital. The cardiac surgery program was started in 1948 and discontinued in June of 1968. This program was one of the first in the West to perform the heart valve operations, mitral commissurotomy in the late 1940s. Even though the program had produced pioneering work in open-heart and lung surgery, it became too expensive to maintain and was no longer considered unique.

An operating room in an unidentified hospital. Five unidentified men and women are standing around a patient who is on the operating table.

An operating room at Denver General Hospital in Denver, Colorado. Five unidentified medical professionals are standing around a patient who is on the table.

Interior of an operating room at the Texas Pavilion, on the campus of the Jewish Consumptives' Relief Society (JCRS). The JCRS was a sanatorium for tuberculosis patients that was founded in 1904 by a group of immigrant Jewish workingmen along with the support of several leading physicians and rabbis in Denver, Colorado. The sanatorium was located on West Colfax Avenue just outside of Denver.