Overview
Postoperative junctional ectopic tachycardia (JET) is a rhythm disturbance characterized by rapid heart rates originating from the atrioventricular junction following surgical procedures, often leading to hemodynamic instability 1.Diagnosis
Clinical Presentation: Rapid heart rate (typically >180 bpm) originating from the junctional pacemaker 1.
Electrocardiogram (ECG): Identification of narrow QRS complexes originating from the AV node or His-Purkinje system 1.
Hemodynamic Assessment: Evaluation of blood pressure and signs of hemodynamic compromise 1.Management
First-Line Treatment: Intravenous amiodarone
- Loading Dose: 5-10 mg/kg 1
- Maintenance Infusion: 10-15 mg/kg/day 1
Adjunctive Measures: Temporary pacing if hemodynamic instability persists despite pharmacologic therapy 1Special Populations
Pediatrics: IV amiodarone is effective and commonly used in children post-surgery for managing JET 1Key Recommendations
Initiate intravenous amiodarone for the treatment of postoperative JET in children with a loading dose of 5-10 mg/kg followed by maintenance infusion at 10-15 mg/kg/day to achieve hemodynamic stability and rhythm control (Evidence: Moderate 1)
Consider temporary cardiac pacing in cases where JET persists despite amiodarone therapy, particularly if there is ongoing hemodynamic instability (Evidence: Expert opinion 1)
Monitor heart rate and blood pressure closely post-treatment initiation to assess response and adjust therapy accordingly (Evidence: Expert opinion 1)References
1 Laird WP, Snyder CS, Kertesz NJ, Friedman RA, Miller D, Fenrich AL. Use of intravenous amiodarone for postoperative junctional ectopic tachycardia in children. Pediatric cardiology 2003. link