Table 4

Outcomes of Radiofrequency Ablation and Cryoablation for Junctional Tachycardias

RadiofrequencyCryoablationp Value
n1727
Year of ablation2002 (1989–2008)2006 (2003–2008)<0.0001
Age, yrs7 (0.05–38)9 (2.4–36)0.31
Ablation indication0.003
 Heart failure, JET, medications unsuccessful52
 Refractory JET, medications unsuccessful107
 Medication side effects02
 Elective212
General anesthesia12 (71%)22 (82%)0.47
JET during electrophysiology study
 Spontaneous10200.57
 Inducible66
 None11
JET frequency during electrophysiology study
 Incessant590.18
 Sustained1010
 Nonsustained17
Isuprel needed for JET6 (38%)8 (31%)0.74
Fluoroscopy time, min9 (3–195)14 (2–50)0.28
Procedure time, min151 (45–220)165 (20–362)0.69
Ablation lesions, n4 (1–32)7 (1–67)0.62
Total duration of ablation lesions, s145 (11–647)1,247 (240–4,472)0.0004
Initial success14 (82%)23 (85%)1.00
Transient third-degree AV block1 (6%)5 (18%)
Inadvertent permanent third-degree AV block3 (18%)00.05
Recurrence after an initially successful procedure2/14 (14%)3/23 (13%)1.00

Data are presented as median (range) or n (%).

AV = atrioventricular; JET = junctional ectopic tachycardia.

  • Cryoablation group includes 26 patients with junctional ectopic tachycardia and 1 with accelerated junctional rhythm.