CRAT Junctional Rhythm Analysis 2

Question 1

A junctional escape rhythm typically fires at which rate?

Accepted Answer

40-60 bpm

Answer

60-100 bpm

Answer

20-40 bpm

Answer

100-150 bpm

Question 2

In a junctional rhythm, P waves appear inverted in the inferior leads (II, III, aVF) because of which mechanism?

Accepted Answer

Retrograde atrial activation from the AV junction travels superiorly, opposite to normal sinus direction

Answer

Atria do not depolarize at all in junctional rhythm

Answer

P waves originate from the right atrium

Answer

The PR interval is prolonged

Question 3

An accelerated junctional rhythm differs from a junctional escape rhythm primarily in which way?

Accepted Answer

Accelerated junctional rhythm has a rate of 60-100 bpm, faster than normal junctional escape

Answer

Accelerated junctional rhythm is slower than escape rhythm

Answer

Accelerated junctional rhythm has wide QRS complexes

Answer

Accelerated junctional rhythm never has P waves

Question 4

If a junctional rhythm shows P waves occurring immediately AFTER each QRS complex (short RP interval), what does this timing indicate?

Accepted Answer

Retrograde atrial activation occurs after ventricular depolarization because the atria are activated slower than the ventricles

Answer

The SA node is functioning normally

Answer

The QRS is conducted aberrantly

Answer

AV block is present

Question 5

Junctional tachycardia is defined by a junctional rhythm exceeding which rate threshold?

Accepted Answer

100 bpm

Answer

60 bpm

Answer

120 bpm

Answer

80 bpm

Question 6

Which clinical condition is most commonly associated with junctional escape rhythm as a primary rhythm?

Accepted Answer

Sick sinus syndrome with sinus arrest

Answer

Atrial fibrillation

Answer

Ventricular hypertrophy

Answer

Bundle branch block