Narrow Complex Tachycardia

Question 1

What are the contraindications of adenosine?

Answer 1

2nd degree/3rd degree AV block, sick sinus syndrome, symptomatic bradycardia, broncoconstriction/bronchospasm, asthma

Question 2

Role of Metoprolol (with Flecainide)

Answer 2

Prevent 1:1 conduction if atrial flutter occurs

Question 3

Multifocal Atrial Tachycardia ECG appearance

Answer 3

Irregular NCT, at least 3 different P wave morphology

Question 4

Multifocal Atrial Tachycardia - causes

Answer 4

Cor pulmonale
Hypoxia and hypercapnia
Increased synthetic drive

Question 5

Short R-P NCT

Answer 5

AVNRT (slow-fast) - 90%
AVRT

Question 6

Long R-P NCT

Answer 6

Atrial tachycardia
Atypical AVNRT (fast-slow, slow-slow)
AVRT w/ slow conducting pathway