ECG Online Electrocardiogram 4

Question 1

Lead II is formed by measuring the electrical difference between the:

Accepted Answer

Right arm and left leg

Answer

Lead II records between the right arm (negative) and left leg (positive).

Question 2

An excessively hairy chest that prevents electrode adhesion should be managed by:

Accepted Answer

Clipping or shaving the site

Answer

Clipping or shaving hair at the site allows proper electrode contact.

Question 3

A 60-cycle (AC) interference artifact usually looks like:

Accepted Answer

Uniform, fine, regular spikes

Answer

AC interference shows as uniform, fine, regularly-spaced spikes.

Question 4

The augmented limb leads on a 12-lead ECG are:

Accepted Answer

aVR, aVL, aVF

Answer

aVR, aVL, and aVF are the three augmented unipolar limb leads.

Question 5

Which condition might require modified electrode placement or a note to the physician?

Accepted Answer

A patient with an amputated limb

Answer

An amputated limb requires modified placement and documentation.

ECG (Electrocardiogram) Practice Test