What causes PJRT?

What causes PJRT?

PJRT is a rare form of refractory and persistent SVT occurring predominantly in infants and children, accounting for 1% of SVT in this age group. PJRT is caused by AV re-entry using the AV node as the antegrade limb and a slowly conducting accessory pathway (AP) as the retrograde limb.

Can PJRT be cured?

Over the past few years radiofrequency catheter ablation of the accessory pathway has been reported to be very effective and safe as definitive treatment of PJRT.

What is PJRT heart?

Permanent junctional reciprocating tachycardia, more commonly referred to as PJRT, is a rare form of supraventricular tachycardia (SVT), or abnormal fast heartbeats, typically seen in infants and children. This type of SVT can be very incessant. The child may constantly be in and out of tachycardia.

What is short RP tachycardia?

Short RP tachycardia is caused by typical atrioventricular nodal reentrant tachycardia, atrioventricular reentrant tachycardia or atrial tachycardia (AT) with first degree AV block. In the last mechanism, delayed AV nodal conduction during tachycardia causes the P wave to be cast close to the preceding R wave.

How common is PJRT?

PJRT is a rare form of refractory and persistent SVT occurring predominantly in infants and children, accounting for 1% of SVT in this age group.

What is the difference between AVRT and AVNRT?

In typical AVNRT, retrograde P waves occur early, so we either don’t see them (buried in QRS) or partially see them (pseudo R’ wave at terminal portion of QRS complex) In AVRT, retrograde P waves occur later, with a long RP interval > 70 msec.

Can you see P waves in SVT?

In SVTs with rapid ventricular rates, P waves are often obscured by the T waves, but may be seen as a “hump” on the T.

What is junctional ectopic tachycardia?

Junctional ectopic tachycardia (JET) is characterized by rapid heart rate for a person’s age that is driven by a focus with abnormal automaticity within or immediately adjacent to the atrioventricular (AV) junction of the cardiac conduction system (ie, AV node–His bundle complex).

How is AVNRT diagnosed?

Tests and procedures used to diagnose AVNRT may include: Blood tests to check thyroid function, heart disease or other conditions that may trigger an irregular heartbeat. Electrocardiogram (ECG) to measure the electrical activity of the heart and measure the timing and duration of each heartbeat.

How do you detect AVNRT?

Two sensitive characteristics to identify AVNRT on the ECG are:

1. R’. This is a small secondary R wave.
2. RP << 100ms. The distance between the R and P waves is less than 100ms.
3. Onset after a premature atrial beat with delayed conduction to the ventricles.