AVNRT

Question 1

what is paroxysmal supra ventricular tachycardia? (PSVT)

Answer 1

Question 2

what is this?

Answer 2

PSVT

Question 3

what symptoms in PSVT?

Answer 3

Question 4

what is atrioventiruclar nodal reentrant tachycardia?

Answer 4

Question 5

what is most common PSVT?

Answer 5

AVNRT

Question 6

what pathway allows AVNRT to occur?

Answer 6

dual pathway

Slow conduction of electrical pulses, short refractory period
+
Fast conduction of electrical pulses, long refractory period

Question 7

what happens in pt with dual pathway if premature atrial contraction occurs?

Answer 7

impulses travel down slow pathway but by the time they reach bottom of AV node, fast pathway ready to conduct again

circuit generated where impulses up fast and down slow, rapidly depolarising bundle of His + purkinje

resultant tachycardia that is not in SA node, but inside AV node (AVNRT)

Question 8

what is this

Answer 8

retrograde p wave, after QRS complex in AVNRT

Question 9

symptoms of AVNRT?

Answer 9

Question 10

what is carotid massage?

Answer 10

Question 11

what are vagal manoeuvres?

Answer 11

Question 12

what is chronic tx for AVNRT?

Answer 12