CET Lead Placement & Recording Procedures

Question 1

What is the correct placement for the V1 lead in a 12-lead ECG?

Accepted Answer

Fourth intercostal space, right of the sternum

Answer

Midclavicular line, 5th intercostal space

Answer

Fourth intercostal space, left of the sternum

Answer

Second intercostal space, right of the sternum

Question 2

Why is it important to avoid placing limb leads over bony areas?

Accepted Answer

They interfere with conductivity and cause inaccurate readings

Answer

They help improve conductivity

Answer

They reduce noise

Answer

They can cause electrode detachment

Question 3

What color is typically used for the left arm electrode in a standard ECG?

Accepted Answer

Black

Answer

Red

Answer

White

Answer

Green

Question 4

How should the skin be prepared before placing electrodes?

Accepted Answer

Shave and clean the skin with alcohol

Answer

Apply lotion to soften skin

Answer

Only wipe with a dry towel

Answer

Use adhesive tape over hair

Question 5

Which lead records electrical activity between the right arm and left leg?

Accepted Answer

Lead II

Answer

Lead I

Answer

Lead III

Answer

aVR

Question 6

Which of the following is part of the precordial (chest) leads?

Accepted Answer

V3

Answer

aVF

Answer

Lead I

Answer

aVR

Question 7

Why must electrode gel be used during ECG?

Accepted Answer

To enhance signal transmission

Answer

To prevent skin burns

Answer

To adhere better to dry skin

Answer

To reduce muscle tremors

Question 8

What might cause wandering baseline in ECG readings?

Accepted Answer

Loose or poorly placed electrodes

Answer

Electrical interference

Answer

Incorrect paper speed

Answer

Too many leads used

Question 9

Which lead is placed at the midaxillary line, level with V4?

Accepted Answer

V6

Answer

V4

Answer

V5

Answer

V2