CET Lead Placement & Recording Procedures 2

Question 1

Which anatomical landmark is used to locate the fourth intercostal space for V1 and V2 placement?

Accepted Answer

Sternal angle (angle of Louis)

Answer

The sternal angle (angle of Louis) marks the junction of the manubrium and sternal body, which aligns with the second rib, allowing the technician to count down to the fourth intercostal space.

Question 2

When applying limb electrodes to a patient with bilateral lower-limb amputations, where should the leg electrodes be placed?

Accepted Answer

On the lower torso or upper thighs bilaterally

Answer

When limbs are absent, electrodes are repositioned to the most distal portion of the remaining limb or the corresponding torso area, maintaining left-right symmetry.

Question 3

What does a 'wandering baseline' on an ECG most commonly indicate?

Accepted Answer

Patient movement or improper skin preparation

Answer

A wandering baseline is typically caused by poor electrode contact, patient breathing, movement, or inadequate skin preparation preventing stable electrical conduction.

Question 4

Which precordial lead is placed at the right side of the sternum at the fourth intercostal space?

Accepted Answer

V1

Answer

V1 is positioned at the right sternal border in the fourth intercostal space, while V2 mirrors it on the left sternal border.

Question 5

The standard paper speed for a resting 12-lead ECG in the United States is:

Accepted Answer

25 mm/sec

Answer

25 mm/sec is the standard paper speed in the US, making each small square represent 0.04 seconds and each large square 0.20 seconds.

(CET) Certified Electrocardiogram Technician Practice Test

(CET) Certified Electrocardiogram Technician Practice Test

CET Lead Placement & Recording Procedures 2