Regular Supraventricular Tachycardia

Question 1

when is it most common

Answer 1

paediatrics

Question 2

what is cause

Answer 2

AV node re-entrant tachycardia
AV reciprocating tachycardia
Ectopic atrial tachycardia
WPW

Question 3

what is WPW

Answer 3

caused by congenital accessory conduction pathway connecting atria and ventricles which does not have rate lowering properties of AV node

Question 4

what is treatment of WPW

Answer 4

destruction of abnormal electrical pathway by radio frequency ablation by cardiac electrophysiologists

Question 5

treatment of acute if haemodynamically stable

Answer 5

increase vagal tone
valsalva maneouvure (forceful attempt exhalation against closed airway)
carotid massage

Question 6

treatment of acute if haemodynamically unstable

Answer 6

emergency cardioversion

Question 7

treatment of chronic

Answer 7

avoid stimulants
adenosine 
class II (atenolol, bisprolol, metopolol, propranolol)
class III (amiodarone)