EKG artifacts
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Editor-in-Chief: Santosh Patel M.D., FRCA [1]
Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
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Artifacts
The gallery of images below shows a variety of EKG artifacts that are due to tremor, movement, movement disorders and electrical interference. These artifacts should not be confused with an abnormality in the patient's electrocardiogram. Atrial fibrillation can be confused with these artifacts.
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Movement artifacts
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Increasing movement artifacts in a Parkinson patient.
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Baseline drift. The amplifier in the ECG machine has to re-find the 'mean'. This often occurs right after lead connection and after electric cardioversion.
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Cardioversion from atrial fibrillation to sinus rhythm, with clear baseline drift.
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Electrical interference from a nearby electrical appliance. A typical example is a 100 Hz background distortion from fluorescent lights. Not to be confused with atrial fibrillation.
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Another example of an artifact caused by an electrical appliance. The patients rhythm is regular. This strip shows 10 QRS complexes.
References
- Dubois Du Bois-Reymond, E. Untersuchungen über thierische Elektricität. Reimer, Berlin: 1848.
- Hoffa Hoffa M, Ludwig C. 1850. Einige neue versuche uber herzbewegung. Zeitschrift Rationelle Medizin, 9: 107-144
- Waller Waller AD. A demonstration on man of electromotive changes accompanying the heart's beat. J Physiol (London) 1887;8:229-234
- Einthoven W. Le telecardiogramme. Arch Int de Physiol 1906;4:132-164
- Einthoven W. Über die Form des menschlichen Electrocardiogramms. Pfügers Archiv maart 1895, pagina 101-123
- Marey EJ. Des variations electriques des muscles et du couer en particulier etudies au moyen de l'electrometre de M Lippman. Compres Rendus Hebdomadaires des Seances de l'Acadamie des sciences 1876; 82: 975-977
- Marquez PMID 12177632
- Hurst PMID 9799216
- Kligfield PMID 17322457