The artefact seen depends on the procedure. Artefacts in electronic readout devices (e.g., EEG, EKG, and EMG) may be due to loose leads or electrical contacts.Īn electrical impulse of noncardiac origin which is recorded as a vertical spike on an EKG or other ECG monitor (e.g., a pacemaker pulse) electrical signals from muscle contractions, or myopotentials, are called muscle artefacts.Īny change in tissue that occurs during tissue processing which may alter a tissue’s appearance and possibly the diagnosis.
(2) The distortion of a substance or signal which interferes with or obscures the interpretation of a study, or a structure that is not representative of a specimen’s in vivo state, or which does not reflect the original sample, but rather is the result of an isolation procedure, its handling or other factors. artefact (1) A structure not normally present, but produced by some external action something artificial.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company.
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