Overview
Permanent junctional reciprocating tachycardia (PJRT) is an incessant tachycardia characterized by a 1:1 atrioventricular relationship, retrograde P wave (P'), and decremental conduction in the retrograde limb, typically originating near the coronary sinus orifice in the posterior atrial septum 123.Diagnosis
Clinical Features: Near-incessant tachycardia, retrograde P wave (P') closer to QRS, long RP' interval 12.
Electrophysiological Studies: Demonstrate early retrograde activation in the posterior atrial septum, decremental conduction properties 2.
Holter Monitoring: Essential for assessing tachycardia burden and heart rate variability 1.
Echocardiography: Evaluate cardiac function, particularly in pediatric cases 1.Management
First-Line Treatment:
- Pharmacological: Propafenone (dose not specified) as initial therapy, often combined with digoxin 1.
Adjunctive Treatments:
- Surgical Ablation: Elective ablation of the retrograde limb of tachycardia near the coronary sinus orifice; successful in 88% of cases 2.
- Closed-Chest Ablation: His bundle ablation using direct-current shocks; effective in inducing stable sinus rhythm 3.Special Populations
Pediatrics: Propafenone and digoxin combination effective in reducing tachycardia incidence and normalizing heart rate in young children 1.
Adults: Closed-chest His bundle ablation can be curative, maintaining sinus rhythm without pacemaker dependency 3.Key Recommendations
Initiate pharmacological treatment with propafenone, possibly combined with digoxin, for managing PJRT in pediatric patients (Evidence: Moderate 1).
Consider elective surgical ablation targeting the retrograde limb near the coronary sinus orifice for persistent PJRT (Evidence: Strong 2).
Closed-chest His bundle ablation can be a viable curative option for adults with PJRT, avoiding the need for long-term medication (Evidence: Weak 3).References
1 van Stuijvenberg M, Beaufort-Krol GC, Haaksma J, Bink-Boelkens MT. Pharmacological treatment of young children with permanent junctional reciprocating tachycardia. Cardiology in the young 2003. link
2 Guarnieri T, Sealy WC, Kasell JH, German LD, Gallagher JJ. The nonpharmacologic management of the permanent form of junctional reciprocating tachycardia. Circulation 1984. link
3 Critelli G, Perticone F, Coltorti F, Monda V, Gallagher JJ. Antegrade slow bypass conduction after closed-chest ablation of the His bundle in permanent junctional reciprocating tachycardia. Circulation 1983. link