[Echocardiographic evaluation in patients with idiopathic ventricular arrhythmias originating from right ventricular outflow tract before and one year after radiofrequency catheter ablation].
OBJECTIVE
To estimate echocardiographic measurements in patients with idiopathic ventricular arrhythmias originating from right ventricular outflow tract (RVOT) before and one year after radiofrequency ablation (RFA) comparing with healthy volunteers.


METHODS
The study consisted of 30 patients (7 women, 34.9+/-15.2 years of age) with predominantly repetitive monomorphic ventricular ectopy and nonsustained ventricular tachycardias. Arrhythmia history was 4.6+/-3.5 years. The control group consisted of 20 healthy unselected subjects (5 women, 41.9+/-5.3 years of age) without left ventricular (LV) dysfunction. All consecutive patients with idiopathic ventricular arrhythmias underwent electrophysiology study and RFA. Transthoracic echocardiography was performed before, 2, 6 and 12 months after RFA.


RESULTS
Significantly higher LV end diastolic volume and lower LV ejection fraction were observed in study group patients to compare with control group patients. LV function significantly improved in postablative patients during 1 year follow up. There were no found complications associated with RFA.


CONCLUSIONS
Idiopathic ventricular arrhythmias originating from right ventricular outflow tract (RVOT) could be a cause of arrhythmogenic LV remodeling. Successful ablation of the focal source of right ventricular ectopy resulted in normalization of LV function during follow up period.
Ardashev
A V
AV
Skliarova
T F
TF
Shavarov
A A
AA
Mangutov
D A
DA
Zheliakov
E G
EG
Pestovskaia
O R
OR
Savina
L N
LN
Sharonova
S P
SP
D000328:Adult; D001145:Arrhythmias, Cardiac / Q000000981:diagnostic imaging* / Q000628:therapy*; D016022:Case-Control Studies; D017115:Catheter Ablation; D004452:Echocardiography; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D018497:Ventricular Dysfunction, Right / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000628:therapy*