ECG Online Electrocardiogram 3

Question 1

The QRS complex on an ECG primarily represents:

Accepted Answer

Ventricular depolarization

Answer

Atrial repolarization

Answer

SA node firing

Answer

Atrial depolarization

Question 2

Which electrode color is standard for the right arm in the AHA labeling system?

Accepted Answer

White

Answer

Black

Answer

Green

Answer

Red

Question 3

The natural pacemaker of the heart is the:

Accepted Answer

SA node

Answer

AV node

Answer

Purkinje fibers

Answer

Bundle of His

Question 4

Muscle tremor (somatic) artifact appears on an ECG as:

Accepted Answer

Irregular, jagged, rapid spikes

Answer

A perfectly flat line

Answer

A slow smooth wave

Answer

Missing QRS complexes

Question 5

How many seconds does one large box on standard ECG paper represent?

Accepted Answer

0.20 sec

Answer

0.04 sec

Answer

1.0 sec

Answer

0.10 sec

Question 6

Before applying chest electrodes, the technician should:

Accepted Answer

Clean and prep the skin site

Answer

Apply lotion to the skin

Answer

Leave skin oily for adhesion

Answer

Place electrodes over bone only

Question 7

The T wave on an ECG represents:

Accepted Answer

Ventricular repolarization

Answer

Atrial depolarization

Answer

Ventricular depolarization

Answer

SA node discharge