Unit 2

Question 1

This is a regular rhythm with impulses initiated in the AV Junction. The only difference between this rhythm and Accelerated Junctional Rhythm is that the rate is greater than 100.

Answer 1

Junctional Tachycardia

Question 2

3 Junctional Rhythms

Answer 2

Junctional Escape Rhythm, Accelerated Junctional Rhythm, and Paroxysmal Supraventricular Tachycardia

Question 3

What causes a junctional escape rhythm?

Answer 3

normal response of the AV junction when SA node fails to fire or fails to reach the AV junction

Question 4

What are the signs and symptoms of a Junctional escape rhythm?

Answer 4

same as symptomatic bradycardia, SOB, chest pain, hypotension, pulmonary congestion, decreased level of consciousness

Question 5

What is the treatment for a Junctional escape rhythm?

Answer 5

Increase the heart rate

Question 6

Rules of Junctional escape rhythm
Regularity:
Rate:
P Wave:
PRI:
QRS:

Answer 6

Regularity: Regular
Rate: 40–60 bpm
P Wave: Will be inverted; can fall before or after the QRS complex or can be hidden within the QRS complex
PRI: Can be measured only if the P wave precedes the QRS complex; if measurable, will be less than 0.12 second
QRS: Less than 0.12 second

Question 7

What Rhythm is this?

Answer 7

Junctional Escape Rhythm

Question 8

Causes of Accelerated Junctional Rhythm

Answer 8

digitalis toxicity, excessive catecholamine administration, damage to AV junction from CAD or MI, electrolyte imbalance, hypoxemia

Examples of catecholamine’s are epi and dopamine

Question 9

Signs and symptoms of Accelerated Junctional Rhythm

Answer 9

same as any tachycardia, hypotension related to reduced cardiac output

Question 10

Treatment of Accelerated Junctional Rhythm

Answer 10

Reduce rate, reduces oxygen consumption

Question 11

What is the mechanism of Accelerated Junctional Rhythm?

Answer 11

An irritable focus in the AV junction speeds up to override the SA node for control of the heart. The atria are depolarized via retrograde conduction. Conduction through the ventricles is normal.

Question 12

What are the rules for Accelerated Junctional Rhythm?
Regularity:
Rate:
P Wave:
PRI:
QRS:

Answer 12

Regularity: regular
Rate: 60–100 bpm
P Wave: will be inverted; can fall before or after the QRS complex or can be hidden within the QRS complex
PRI: can be measured only if the P wave precedes the QRS complex; if measurable, will be less than 0.12 second
QRS: less than 0.12 second

Question 13

What rhythm is this?

Regularity: regular
Rate: 60–100 bpm
P Wave: will be inverted; can fall before or after the QRS complex or can be hidden within the QRS complex
PRI: can be measured only if the P wave precedes the QRS complex; if measurable, will be less than 0.12 second
QRS: less than 0.12 second

Answer 13

Accelerated Junctional Rhythm

Question 14

What Rhythm is this?

Answer 14

Accelerated Junctional Rhythm

Question 15

What is the mechanism of Junctional Tachycardia?

Answer 15

A very rapid irritable focus in the AV junction overrides the SA node for control of the heart. The atria are depolarized via retrograde conduction. Conduction through the ventricles is normal.

Question 16

What are the rules for Junctional Tachycardia?
Regularity:
Rate:
P Wave:
PRI:
QRS:

Answer 16

Regularity: Regular
Rate: 100–180 bpm
P Wave: Will be inverted; can fall before or after the QRS complex or can be hidden within the QRS complex
PRI: Can be measured only if the P wave precedes the QRS complex; if measurable, will be less than 0.12 second
QRS: Less than 0.12 second