Conduction Disorders

Question 1

Bradyarrhythmias

Answer 1

Sinus Bradycardia

Sick Sinus Syndrome - TachyBrady Syndrome

Atrioventricular Block - 1st, 2nd type I, II, 3Rd degree AV block

Question 2

Tachyarrhythmias -SVT

Answer 2

Atrial Fibrillation
Atrial Flutter
AVNRT
AVRT

Question 3

Tachyarrhythmias - VTach

Answer 3

Ventricular Tachycardia
Ventricular Fibrillation
Torsades de Pointe

Question 4

Premature Beats

Answer 4

Premature Atrial Contraction

Premature Ventricular Contractions

Question 5

< 60 bpm

Answer 5

Sinus Bradycardia

Question 6

Sinus bradycardia is commonly seen in

Answer 6

Young, Athletes, 
Medication induced, 
↑ vagal tone, 
↑ intracranial pressure (Widening pulse pressure, irregular respirations, bradycardia), 
Inferior MI,
sleep

Question 7

Treatment for sinus bradycardia

Answer 7

not necessary - only for severe symptoms

Question 8

Treatment for severe bradycardia

Answer 8

Atropine
Avoiding AVN blocking agents
Pacemaker

Question 9

4 types of Sick Sinus Syndrome

Answer 9

Persistent spontaneous sinus bradycardia not caused by medications and inappropriate for the physiologic stimulus

Sinus arrest or sinus exit block

Combinations of SA or AV nodal conduction disturbances

Alterations of paroxysms of rapid regular or irregular atrial tachyarrhythmias and periods of slow atrial or ventricular rates (Tachy-Brady Syndrome)

Chronotropic Incompetence

Question 10

Causes of Sick Sinus Syndrome

Answer 10

Other tachyarrythmias (Afib, SVT) – causes atrial remodeling fibrosis

Fibrosis (Senile degeneration)

Atrial Infarct (RCA)

Infiltrative heart disease (Sarcoidosis, Amyloidosis)