What does the medical prefix "Tachy-" indicate?

The prefix "Tachy-" originates from the Greek word "tachys," meaning swift or fast. In medical terminology, this prefix is used to describe conditions or rates that are considered faster than normal. For example, tachycardia refers to an abnormally fast heart rate. This illustrates how the prefix is applied to indicate increased speed or intensity. Understanding the meaning of medical prefixes like "Tachy-" is essential for interpreting various medical terms and communicating effectively in healthcare settings.