ECG ECG Interpretation

Question 1

What does the P wave on an ECG represent?

Accepted Answer

Atrial depolarization

Answer

Ventricular depolarization

Answer

Atrial repolarization

Answer

Ventricular repolarization

Question 2

A normal PR interval ranges from:

Accepted Answer

0.12 to 0.20 seconds

Answer

0.06 to 0.10 seconds

Answer

0.24 to 0.36 seconds

Answer

0.40 to 0.60 seconds

Question 3

ST segment elevation most commonly indicates:

Accepted Answer

Acute myocardial injury

Answer

Normal variant in all cases

Answer

Chronic heart failure

Answer

Pulmonary embolism

Question 4

What does the QRS complex represent?

Accepted Answer

Ventricular depolarization

Answer

Atrial depolarization

Answer

Ventricular repolarization

Answer

AV node conduction

Question 5

What is the standard paper speed for ECG recording?

Accepted Answer

25 mm/sec

Answer

50 mm/sec

Answer

10 mm/sec

Answer

100 mm/sec

Question 6

Lead II records electrical activity between which electrodes?

Accepted Answer

Right arm and left leg

Answer

Right arm and left arm

Answer

Left arm and left leg

Answer

Right leg and left arm