NHI Electrocardiography and Cardiac Monitoring

Question 1

What does the P wave on an ECG represent?

Accepted Answer

Atrial depolarization

Answer

Ventricular depolarization

Answer

Ventricular repolarization

Answer

Atrial repolarization

Question 2

The QRS complex on an ECG represents which cardiac event?

Accepted Answer

Ventricular depolarization

Answer

Atrial depolarization

Answer

Atrial repolarization

Answer

Ventricular repolarization

Question 3

What is the normal range for heart rate in sinus rhythm?

Accepted Answer

60–100 bpm

Answer

40–60 bpm

Answer

100–150 bpm

Answer

150–200 bpm

Question 4

How many electrodes are placed on a patient for a standard 12-lead ECG?

Accepted Answer

10

Answer

6

Answer

8

Answer

12

Question 5

The T wave on an ECG represents which cardiac event?

Accepted Answer

Ventricular repolarization

Answer

Atrial depolarization

Answer

Ventricular depolarization

Answer

Atrial repolarization

Question 6

Which is the correct placement for the V1 precordial lead?

Accepted Answer

4th intercostal space, right sternal border

Answer

4th intercostal space, left sternal border

Answer

5th intercostal space, midaxillary line

Answer

2nd intercostal space, right sternal border

Question 7

What is the standard paper speed used when recording an ECG?

Accepted Answer

25 mm/sec

Answer

10 mm/sec

Answer

50 mm/sec

Answer

75 mm/sec