左室特发性室性心动过速的射频消融治疗

Radiofrequency ablation on idiopathic left ventricular tachycardia

对 19例 IL VT患者进行射频消融治疗 ,在心动过速时标测最早出现的 P电位 ,并以此处为靶点进行消融。 19例中 ,心动过速起源于左室间隔面者 18例 ,左室流出道 1例 ;有 17例标测到 P电位 ,较体表心电图 QRS波群平均提前 2 4.7± 9.0 ms,均为起源于间隔部位者 ;另 2例标测到提前出现的 V波 ,分别提前 10 m s和 2 0 ms。射频消融治疗的总成功率为 95 .2 % ,复发率 5 %。采用激动标测寻找最早 P电位处为消融靶点是提高消融成功率的关键。

WT5”BZ]Electrophysiologic study and radiofrequency ablation(RFA)were performed in 19 patients with idiopathic left ventricular tachycardia (ILVT) The site of earliest P potential on activation mapping was the target of RFA The original sites of ILVT were located in septum of left ventricle (18 patients) and in LVOT(1 patient) P potential was mapped in 17 patients with the origin of septum,which was ahead QRS complex of body surface ECG about 24 7±9 0ms However,the earliest V waves were mapped in 2 patients(1 patient with the origin of LVOT),about 10ms and 20 ms ahead respectively The total success rate of RFA was 95 2% while the recurrence rate was 5% This suggests that RFA of ILVT is with high success rate and few complications The site of earliest P potential as the target of RFA is the key of high success rate [WT5”HZ]