EKG certification Certification EKG Certification General 1

Question 1

What is the normal duration of a QRS complex in an adult?

Accepted Answer

0.04–0.10 seconds

Answer

0.12–0.20 seconds

Answer

0.20–0.24 seconds

Answer

0.06–0.08 seconds

Question 2

On a standard EKG, how fast does the paper move?

Accepted Answer

25 mm/sec

Answer

50 mm/sec

Answer

10 mm/sec

Answer

100 mm/sec

Question 3

Which waveform on an EKG represents atrial depolarization?

Accepted Answer

P wave

Answer

T wave

Answer

QRS complex

Answer

U wave

Question 4

A rhythm strip shows no visible P waves and an irregularly irregular ventricular response. What is the most likely rhythm?

Accepted Answer

Atrial fibrillation

Answer

Atrial flutter

Answer

Ventricular tachycardia

Answer

Junctional rhythm

Question 5

What does the T wave on an EKG represent?

Accepted Answer

Ventricular repolarization

Answer

Atrial repolarization

Answer

Ventricular depolarization

Answer

SA node firing

Question 6

Which EKG change is a classic early sign of hyperkalemia?

Accepted Answer

Peaked, narrow T waves

Answer

Prolonged QT interval

Answer

Widened P wave

Answer

ST segment depression