CRAT - Certified Rhythm Analysis Technician Junctional Rhythm Analysis Questions and Answers

Question 1

A rhythm analysis technician is reviewing a 6-second strip that shows a regular rhythm with a heart rate of 50 bpm.
P waves are not discernible, and the QRS complexes are narrow, measuring 0.08 seconds.
Which rhythm should the technician identify?

Accepted Answer

Junctional Rhythm

Answer

Sinus Bradycardia

Answer

Idioventricular Rhythm

Answer

Third-Degree AV Block

Question 2

Which of the following ECG findings is the most definitive characteristic of a rhythm originating from the AV junction?

Accepted Answer

An inverted or absent P wave with a short PR interval if visible

Answer

A wide QRS complex (>0.12 seconds)

Answer

A heart rate greater than 100 bpm

Answer

A regularly irregular R-R interval

Question 3

A CRAT observes a regular rhythm on a patient's monitor with a rate of 75 bpm. The QRS complexes are 0.06 seconds wide. There are inverted P waves in lead II just before each QRS complex, with a PR interval of 0.10 seconds. What is the correct interpretation of this rhythm?

Accepted Answer

Accelerated Junctional Rhythm

Answer

Junctional Tachycardia

Answer

Sinus Rhythm with PACs

Answer

Junctional Escape Rhythm

Question 4

What is the intrinsic pacemaker rate of the atrioventricular (AV) junction?

Accepted Answer

40-60 bpm

Answer

20-40 bpm

Answer

100-150 bpm

Answer

60-100 bpm

Question 5

A patient's ECG shows a regular, narrow-complex rhythm at a rate of 120 bpm. No P waves are visible before, during, or after the QRS complexes. This rhythm is best described as:

Accepted Answer

Junctional Tachycardia

Answer

Accelerated Junctional Rhythm

Answer

Sinus Tachycardia

Answer

Atrial Fibrillation

Question 6

All of the following are potential P wave presentations in a junctional rhythm EXCEPT:

Accepted Answer

Upright and uniform before each QRS with a PR interval of 0.16 seconds

Answer

Inverted, appearing immediately before the QRS complex

Answer

Absent, buried within the QRS complex

Answer

Inverted, appearing immediately after the QRS complex