Holter monitor
[hohl-ter]
noun
a portable electrocardiograph worn by a patient over an extended period of time to assess the effects on heart function of activities of daily living.
Origin of Holter monitor
after Norman J. Holter (born 1914), U.S. physicist, its developer
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019