ECG ECG Interpretation 2

Question 1

Which ECG finding is characteristic of atrial fibrillation?

Accepted Answer

Irregularly irregular rhythm with no P waves

Answer

Regular rhythm with tall P waves

Answer

Wide QRS complexes only

Answer

Saw-tooth pattern

Question 2

A prolonged QT interval increases the risk of:

Accepted Answer

Torsades de pointes

Answer

Atrial flutter

Answer

First-degree heart block

Answer

Pericarditis

Question 3

Which lead is best for identifying atrial activity?

Accepted Answer

Lead V1

Answer

Lead I

Answer

Lead aVL

Answer

Lead V6

Question 4

What ECG change is seen with hyperkalemia?

Accepted Answer

Peaked T waves

Answer

Inverted P waves only

Answer

Short QT interval

Answer

Delta waves

Question 5

What does sinus rhythm mean on an ECG?

Accepted Answer

The heart rhythm originates from the SA node

Answer

The heart is beating irregularly

Answer

There is a conduction block

Answer

The ventricles are pacing the heart

Question 6

What is the normal duration of the QRS complex?

Accepted Answer

0.06 to 0.10 seconds

Answer

0.12 to 0.20 seconds

Answer

0.20 to 0.30 seconds

Answer

0.01 to 0.04 seconds