Beat Reading Heart Beat Reading 2

Question 1

A patient's ECG shows a PR interval of 0.28 seconds. This finding is most consistent with:

Accepted Answer

First-degree AV block

Answer

A PR interval greater than 0.20 seconds that is consistent and not associated with dropped beats indicates first-degree AV block.

Question 2

On a standard ECG tracing, what does the T wave represent?

Accepted Answer

Ventricular repolarization

Answer

The T wave represents ventricular repolarization, the electrical recovery of the ventricles after contraction.

Question 3

Which rhythm is characterized by an irregularly irregular pattern with no identifiable P waves?

Accepted Answer

Atrial fibrillation

Answer

Atrial fibrillation produces an irregularly irregular rhythm with absent distinct P waves, replaced by chaotic fibrillatory baseline.

Question 4

A heart rate of 42 bpm with a normal P-QRS relationship is best described as:

Accepted Answer

Sinus bradycardia

Answer

Sinus bradycardia is defined as a sinus-originated rhythm with a rate below 60 bpm with normal P wave morphology preceding each QRS.

Question 5

How many small squares on standard ECG paper equal one large square?

Accepted Answer

5

Answer

Each large square on standard ECG paper contains 5 small squares, with each small square representing 0.04 seconds.

Beat Reading Practice Test