Which action is most appropriate to prevent electrical interference artifact during ECG recording?
QUESTION
Find the error: V1 is placed at the left sternal border. What is the correction?
QUESTION
Identify the best action to reduce artifact when the patient has oily or diaphoretic skin.
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ANSWER
Clean and dry skin; gently abrade before applying electrodes. Removing oils and dead skin improves electrode adhesion and signal quality, reducing impedance-related artifacts.