[Catheter ablation of focal atrial tachycardia:the topographic distribution and long-term outcome].
OBJECTIVE
To explore the topographic distribution and long-term outcome of catheter ablation for focal atrial tachycardia (AT).


METHODS
The data of 207 patients who underwent electrophysiologic study for AT were retrospectively analyzed.


RESULTS
A total of 200 AT were identified in 185 patients. The most common site for AT was ostium of the coronary sinus (23.8%), followed by crista terminalis (20.5%), perinodal area (20.0%), cava vena (17.8%), annulus (13.0%), and appendage (10.3%). Eighty percent AT originated from the right atrium, 17.8% originated from the left atrium. AT originated from the left atrium was more common in male than in female (25.0% vs. 13.3%, P = 0.042), while AT originated from the right atrium was more common in female than in male (69.4% vs. 86.7%, P = 0.004). Among the 185 patients, acute success ablation rate was 93.5% (n = 173). The acute success rate in the conventional mapping group was lower than that in the three-dimensional mapping group (79.3% vs. 96.5%, P < 0.01). During a median of 36 months follow up, the AT recurred in 20 patients (success ablation rate 88.4%). Success ablation rate was similar between the conventional mapping group and the three-dimensional mapping group (P > 0.05).


CONCLUSIONS
Focal AT commonly originates from ostium of coronary sinus, crystal terminalis, perinodal area, and cava veins. There is a gender related difference in the distribution of focal AT. The radiofrequency catheter ablation yields a satisfying success rate and very low complication rate and could be the first line choice for treating ATs in experienced electrophysiological center.
Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
Ye
Y
Xia
Wei-zhu
WZ
Ju
Ming-long
ML
Chen
Bing
B
Yang
Feng-xiang
FX
Zhang
Hong-wu
HW
Chen
Yu-min
YM
Sun
Xiao-feng
XF
Hou
Chun
C
Chen
Jian-gang
JG
Zou
Qi-jun
QJ
Shan
Ke-jiang
KJ
Cao
D000293:Adolescent; D000328:Adult; D000368:Aged; D017115:Catheter Ablation; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013612:Tachycardia, Ectopic Atrial / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery*; D055815:Young Adult