Radiofrequency catheter ablation of verapamil-sensitive idiopathic left ventricular tachycardia
- VernacularTitle:射频导管消融治疗维拉帕米敏感性左心室特发性室性心动过速
- Author:
Xianzhang MENG
;
Mingde GUAN
;
Dianwen ZHANG
- Publication Type:Journal Article
- Keywords:
Tachycardia, ventricular;
Electrophysiologic techniques, cardiac;
Catheter ablation, radiofrequency
- From:
Chinese Journal of Interventional Cardiology
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effect of RF catheter ablation of verapamil-sensitive idiopathic left ventricular tachycardia according to the re-entrant route mapped during electrophysiologic test. Methods 6 patients (4 male & 2 female) suffered from the ioliopathic left venticulan tachycondia (ILVT). After placing the catheter in the right ventricular apex and the coronary sinus, a radiofrequency (RF) catheter and a octapolar catheter (mapping catheter) with an interval of 2-8-2 min were introduced through the right and left femoral arteries. The mapping catheter recorded the His potential (HP), the left bundle potential (LBP), the left posterior fascicle Purkinje potential (PP) and V electrogram sequentially, PP was the first potential to be detected with the RF catheter during TV, we searched for the earliest PP recording site near the couple of electrodes of the mapping catheter recording PP and ablated it. Results In the first 3 cases, ablation didn′t have effect at sites recording the earliest V electrogram without PP and it was finally successful at the sites recording the earliest PP. Since the fourth case all patients needed only one application because ablation was carried out only at the site recorded the earliest PP. Patients have been followed for 6-20 months without antiarrhythmic drugs, and none of them has had a recurrence of VT. Conclusion The mapping on the left ventricular septum is not only important to study the reentrant route in ILVT, but also helpful for clinical treatment of ILVT. It shortens the operation time and minimizes injury of cardiac muscle due to noneffective ablation.
