Table 1.
Tachycardia origin and results of RFCA for idiopathic ventricular arrhythmias
| Arrhythmia origin | No.(%) | VT(SVT) | PVCs | Success (%) |
|---|---|---|---|---|
| Tricuspid annulus |
35(9.23) |
5(2) |
30 |
32(91.43) |
| Free wall portion |
29(7.65) |
5(2) |
24 |
28(96.55) |
| Septal portion |
6(1.58) |
0 |
6 |
4(66.67) |
| RVOT |
235(62.01) |
28(9) |
207 |
224(95.32) |
| PA |
14(3.69) |
5(0) |
9 |
14(100.00) |
| Aortic sinus of Valsalva |
24(6.33) |
5(0) |
19 |
19(79.17) |
| LVOT |
5(1.32) |
1(0) |
4 |
5(100.00) |
| LV septum |
48(12.67) |
25(25) |
23 |
43(89.58) |
| Anterosuperior septum |
12(3.17) |
1(1) |
11 |
10(83.33) |
| Posteroinferior septum |
36(9.50) |
24(24) |
12 |
33(91.67) |
| Mitral annulus |
5(1.32) |
2(1) |
3 |
5(100.00) |
| LV epicardium |
7(1.85) |
4(2) |
3 |
4(57.14) |
| Others(RVIT 3,LV Free wall 3) |
6(1.58) |
1(0) |
5 |
5(83.33) |
| Total | 379(100.00) | 76(39) | 303 | 351(92.61) |
VT, ventricular tachycardia; SVT, sustained ventricular tachycardia; RVOT or LVOT, the right or left ventricular outflow tract, respectively; PA, pulmonary artery; PVCs, premature ventricular complexes; LV, left ventricular; RVIT, right ventricular inflow tract; LV epicardium, Idiopathic ventricular arrhythmias that could not be ablated with RFCA from the left sinus of Valsalva despite earliest ventricular activation being recorded in the left sinus of Valsalva or that could be ablated within coronary venous system were classified as originating from the LV epicardium in the present study.