What type of artifact can lead misplacement cause on ECG?

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Multiple Choice

What type of artifact can lead misplacement cause on ECG?

Lead misplacement creates an artifact by giving the ECG a wrong electrical vector. When electrodes are placed incorrectly—such as swapping limbs or placing chest leads in the wrong positions—the recorded signals don’t reflect the heart’s true activity. This can produce apparent axis shifts in the QRS complex and misleading ST-T changes that mimic ischemia or infarction, even though the heart’s conduction and tissues are normal. Recognizing this pattern helps distinguish a recording artifact from real pathology. In contrast, a normal artifact without ECG changes isn’t consistent with misplacement causing axis or ischemic-looking changes, and real conditions like atrial flutter with 2:1 block or pericarditis present genuine rhythm or inflammatory patterns rather than just an electrode-placement artifact.

Lead misplacement creates an artifact by giving the ECG a wrong electrical vector. When electrodes are placed incorrectly—such as swapping limbs or placing chest leads in the wrong positions—the recorded signals don’t reflect the heart’s true activity. This can produce apparent axis shifts in the QRS complex and misleading ST-T changes that mimic ischemia or infarction, even though the heart’s conduction and tissues are normal. Recognizing this pattern helps distinguish a recording artifact from real pathology.

In contrast, a normal artifact without ECG changes isn’t consistent with misplacement causing axis or ischemic-looking changes, and real conditions like atrial flutter with 2:1 block or pericarditis present genuine rhythm or inflammatory patterns rather than just an electrode-placement artifact.

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