Which of these is the only factor that does not require consideration when placing electrodes for an ECG test?

Which of these is the only factor that does not require consideration when placing electrodes for an ECG test?
A . Patient scars
B . Patient ethnicity
C . Patient piercings
D . Patient stents

Answer: B

Explanation:

An ECG test requires a clear flow between electrodes: any thickening of the skin or metal objects may impede this. Do not place electrodes over piercings, scars or stents or in such a way that these elements may interfere with results.