NEET SS Practice Quiz

Question 1

In typical slow-fast AV nodal re-entrant tachycardia (AVNRT), which limb usually conducts antegradely during the tachycardia circuit?

Accepted Answer

Slow pathway

Question 2

Which electrophysiologic feature best distinguishes orthodromic AV re-entrant tachycardia (AVRT) from typical AVNRT?

Accepted Answer

Participation of an accessory atrioventricular pathway in the re-entry circuit

Question 3

During tachycardia, a His-refractory premature ventricular complex advances the next atrial electrogram without terminating the arrhythmia. What does this strongly support?

Accepted Answer

Orthodromic AVRT using an accessory pathway

Question 4

In atypical fast-slow AVNRT, which electrophysiologic pattern is expected compared with typical slow-fast AVNRT?

Accepted Answer

Long RP tachycardia due to slow retrograde conduction

Question 5

During an EP study, a premature atrial extrastimulus causes a sudden increase in the AH interval by 70 ms with only a 10 ms decrement in the coupling interval. What does this most strongly indicate?

Accepted Answer

Dual AV nodal physiology

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