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Updated: Jun 28, 2026

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

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Published on: January 31, 2019

Taquicardia ectópica de la unión auriculoventricular postoperatoria con morfología variable del complejo QRS: reporte

Luka Lovrenčić¹, Matija Bakoš¹

¹Department of Pediatrics, University Hospital Center Zagreb, Kišpatićeva 12, Zagreb, Croatia.

Journal of electrocardiology

|February 17, 2026

Abstract:

Junctional ectopic tachycardia (JET) is a rare but clinically important arrhythmia most often encountered in infants and children, either congenitally or within 72 h after congenital heart surgery. We report a neonate who developed postoperative JET with variable QRS morphologies after an arterial switch operation, in whom QP interval and QRS duration correlated with the preceding RR interval. The arrhythmia caused hemodynamic instability requiring antiarrhythmic therapy and supportive measures. This case illustrates the diverse electrocardiographic manifestations of postoperative JET and highlights the importance of early rhythm characterization to guide timely, mechanism-based management in critically ill neonates.

Palabras clave:

Terapia antiarrítmica Cardiopatía congénita Electrocardiografía Complejo QRS Variabilidad del QRS

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