[1][4][5] As years have passed, Harvey has been upgraded with the addition of more advanced cardiac functions, with the intention of creating a general and also in-depth program in cardiology.

For beginners, the simulator is used to teach blood pressure measurement techniques and help students recognize a heart murmur.

For more senior level medical students, Harvey can mimic heart sound variation with respiration, along with a variety of cardiac issues, such as carotid or jugular venous pulsations.

By mimicking the basic cardiac functions of the human body, Harvey provides a much more realistic training exercise than a traditional classroom lecture.

[1] By removing the risk of working on a real patient, simulators prepare medical students, or anyone else who uses the device, for real-world situations.

The first commercial model used a series of cams and levers instead of telephone relays, but kept the 4-track tape recordings for sound.

The third and current version of this simulator uses a servo motor and a sound card to mimic the cardiovascular functions of the human body.

When using Harvey, trainees also use the slide programs, which provide additional sources of instruction by giving patient history, examples of laboratory findings from real patients who had the disease, as well as therapeutic decisions, pathologic data, and epidemiological data.