CRAT ECG Waveform Measurements and Intervals 3

Question 1

In the 6-second strip method for calculating heart rate, you count the number of QRS complexes and:

Accepted Answer

Multiply by 10

Answer

In the 6-second method, counting QRS complexes in a 6-second strip and multiplying by 10 gives beats per minute.

Question 2

A notched or bifid P wave (P mitrale) is associated with:

Accepted Answer

Left atrial enlargement

Answer

A wide, notched P wave (P mitrale) indicates left atrial enlargement, often seen in mitral valve disease.

Question 3

What does the TP segment of the ECG represent?

Accepted Answer

The true isoelectric baseline during diastole

Answer

The TP segment, occurring between the end of the T wave and the start of the next P wave, represents the true isoelectric baseline during diastole.

Question 4

Tall, peaked T waves on an ECG are classically associated with:

Accepted Answer

Hyperkalemia

Answer

Hyperkalemia causes tall, peaked (tent-shaped) T waves, and as potassium rises further, it can cause widened QRS and eventual sine-wave pattern.

Question 5

The J point on the ECG is defined as:

Accepted Answer

The junction between the QRS complex and ST segment

Answer

The J point is the junction where the QRS complex ends and the ST segment begins, and is the reference point for measuring ST elevation or depression.

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT ECG Waveform Measurements and Intervals 3