FREE CRAT ECG Interpretation Questions and Answers

Question 1

Ensuring that the electrocardiograph is properly grounded reduces the risk of:

Accepted Answer

60-cycle electrical interference

Answer

Electrical shock

Answer

Paper speed acceleration

Answer

Faulty interpretation of results

Question 2

In a normal sinus rhythm, the sinus node fires at a rate of:

Accepted Answer

61-100 per minute

Answer

40-60 per minute

Answer

101-150 per minute

Answer

151-180 per minute

Question 3

Which of these is a method that can be used to calculate the ventricular rate of a cardiac rhythm when the R-R is regular?

Accepted Answer

Divide the number of large boxes between 2 R waves into 300

Answer

Add the number of large boxes between 2 R waves to 300

Answer

Subtract the number of large boxes between 2 R waves from 300

Answer

Multiply the number of large boxes between 2 R waves by 300

Question 4

An EKG caliper measurement of peak-to-peak flutter waves reveals five small boxes. What is the atrial rate of for this rhythm?

Accepted Answer

300 BPM

Answer

60 BPM

Answer

120 BPM

Answer

150 BPM

Question 5

In standard calibration ECG graph paper, a deflection of the tracing upward or downward by one large box (outlined by thick, dark lines) from the baseline represents:

Accepted Answer

0.5 millivolt

Answer

0.25 millivolt

Answer

1.0 millivolt

Answer

1.0 volt

Question 6

Which waveform represents ventricular repolarization on an ECG strip?

Accepted Answer

T wave

Answer

P wave

Answer

R wave

Answer

S wave

Question 7

To get an accurate measurement of the QRS complex, measure from:

Accepted Answer

The beginning of the Q wave to the end of the S wave

Answer

The middle of the Q wave to the middle of the S wave

Answer

The end of the Q wave to the end of the S wave

Answer

Before the Q wave to after the end of the S wave

Question 8

The P wave on the electrocardiogram represents an electrical impulse that spreads through the:

Accepted Answer

Atria

Answer

Ventricles

Answer

Bundle of His

Answer

Purkinje Fibers

Question 9

The first negative deflection noted in the QRS complex is which wave?

Accepted Answer

Q wave

Answer

S wave

Answer

R wave

Answer

T wave

Question 10

What mode of operation is exhibited in the lead II rhythm strip?

Accepted Answer

Atrial and Ventricular sensing

Answer

Atrial pacing only

Answer

Ventricular sensing only

Answer

Atrial and Ventricular pacing