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Table 4 Electrophysiological characteristics of idiopathic VT

From: Radiofrequency catheter ablation of ventricular tachycardia in pediatric patients

 

Idiopathic LV (N = 22)

Idiopathic RV (N = 4)

Procedure numbers

28

5

Age at ablation (years), Median (range)

14 (10–19) years

14 (6.9–15) years

Sex (M/F)

18/4

2/2

VT inducibility

 Not induced, n (%)

2/28 (7.1%)

0/5 (0.0%)

 Poor inducibility, n (%)

12/28 (42.9%)

2/5 (40.0%)

 Easy inducibility, n (%)

14/28 (50.0%)

3/5 (60.0%)

Mapping, n (%)

 Activation mapping

4/28 (14.3%)

3/5 (60.0%)

 Pace mapping

10/28 (35.7%)

3/5 (60.0%)

 Purkinje potential guided mapping

16/28 (57.1%)

0/5 (0.0%)

 3D-CARTO mapping

6/28 (21.4%)

1/5 (20.0%)

VT focus

 LV posteroseptal

24/28 (85.7%)

 LV anteroseptal

1/28 (3.6%)

 LV papillary muscle

1/28 (3.6%)

 RVOT septal

3/5 (60.0%)

 RV free wall

2/5 (40.0%)

  1. RV Right ventricle; LV left ventricle; RVOT right ventricular outflow tract; VT ventricular tachycardia