ECG Electrode Placement Quiz

How many leads are recorded in a 12-lead ECG?

• 6

• 10

• 12

• 14

What is the difference between an electrode and a lead?

• There is no difference

• An electrode is a sensor, while a lead is a recording of electrical activity

• An electrode is on the chest, while a lead is on the limbs

• Electrodes are used for precordial leads, while leads are used for limb leads

How many types of electrodes are used in a 12-lead ECG?

• 1

• 2

• 3

• 4

Where are limb electrodes placed?

Answer explanation

Limb electrodes are placed on the limbs of the body, typically on the arms and legs, to measure electrical activity in the muscles.

Where are precordial electrodes placed?

Answer explanation

Precordial electrodes are placed on the chest, specifically on the left and right sides of the sternum and around the heart area to monitor cardiac activity.

Which of the following is a mnemonic device for limb electrode placement?

• Red over fire, white on the right, clouds over grass

• White on the right, clouds over grass, smoke over fire

• Grass over clouds, fire over red

• Smoke over fire, grass over clouds, white on the right

Which of the following is a mnemonic device for precordial electrode placement?

• Ride your green bike on pavement

• Bike on green pavement, ride your

• Pavement, ride your bike on green

• Green bike on pavement, ride your

How many limb electrodes are there?

• 4

• 6

• 8

• 10

How many precordial electrodes are there?

• 4

• 6

• 8

• 10

The V1 precordial electrode is placed at the:

• Fourth intercostal space, right sternal border

• Fourth intercostal space, left sternal border

• Fifth intercostal space, right sternal border

• Fifth intercostal space, left sternal border