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From Citizendium, the Citizens' Compendium

Electronics for Medicine, commonly known as "E for M," was a pioneering company in medical electronics. Founded in the 1950s to make instrumentation for recording physiological signals from the heart, it was based in Westchester County, New York.

Its product line ultimately included instrumentation for all cardiac-related medical procedures, including electrocardiography, electrophysiology, echocardiography, and patient monitoring. Its DR and VR series physiological recorders were used in almost every cardiac catheterization laboratory from the 1950s well into the 1980s, and are widely mentioned in cardiology papers of that era.

In 1979, the company was sold to Honeywell, and its name was changed to E for M/Honeywell. In the mid-1980s it was sold to PPG Industries, moved to the Kansas City, Kansas area, and renamed as a division of that company. In 1990, is was sold to an investor who renamed it E for M. Marquette Medical Systems acquired E for M in 1996 and moved it to Florida. By the time General Electric Medical Systems acquired Marquette in late 1998, the name E for M had disappeared, as had the original company's products.

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