In an electrocardiogram, what is an artifact?

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Multiple Choice

In an electrocardiogram, what is an artifact?

Explanation:
An artifact on an electrocardiogram is any signal on the tracing that does not come from the heart’s electrical activity and is instead caused by external factors or technical issues. These unwanted interferences can come from muscle activity, patient movement, poor electrode contact, electrical interference from nearby devices, or slow baseline drift due to breathing or skin impedance. The broad description “unwanted interference on the recording” captures all these non-cardiac signals, which is why it’s the best choice. By contrast, the P wave and the QRS complex are normal parts of the heart’s rhythm representing atrial and ventricular depolarization. Baseline wander is a specific type of artifact, often due to respiration or impedance changes, but it falls under the general umbrella of unwanted recording interference. To reduce artifacts, ensure good skin prep, secure electrode placement, minimize movement, and verify lead connections.

An artifact on an electrocardiogram is any signal on the tracing that does not come from the heart’s electrical activity and is instead caused by external factors or technical issues. These unwanted interferences can come from muscle activity, patient movement, poor electrode contact, electrical interference from nearby devices, or slow baseline drift due to breathing or skin impedance. The broad description “unwanted interference on the recording” captures all these non-cardiac signals, which is why it’s the best choice. By contrast, the P wave and the QRS complex are normal parts of the heart’s rhythm representing atrial and ventricular depolarization. Baseline wander is a specific type of artifact, often due to respiration or impedance changes, but it falls under the general umbrella of unwanted recording interference. To reduce artifacts, ensure good skin prep, secure electrode placement, minimize movement, and verify lead connections.

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