Change in morphology of reentrant atrial arrhythmias without termination following radiofrequency catheter ablation.
A 60-year-old woman who had previously undergone an atrial septal defect repair and had type I atrial flutter underwent electrophysiological study. After radiofrequency (RF) ablation to the isthmus between the inferior vena cava and the tricuspid annulus, type I atrial flutter was changed to atrial tachycardia following atriotomy without termination. This atrial tachycardia was eliminated by single-site RF ablation of a small lesion below the caudal end of the atriotomy scar, where continuous and fragmented potentials were recorded during tachycardia. We experienced a rare case in which RF energy changed tachycardia circuits.
Takagi
Masahiko
M
Division of Cardiology, Department of Internal Medicine, National Cardiovascular Center, 5-7-1 Fujishiro-dai, Suita, Osaka 5658565, Japan.
Suyama
Kazuhiro
K
Taguchi
Atsushi
A
Shimizu
Wataru
W
Kurita
Takashi
T
Aihara
Naohiko
N
Kamakura
Shiro
S
D001282:Atrial Flutter / Q000503:physiopathology / Q000601:surgery*; D017115:Catheter Ablation / Q000009:adverse effects*; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006801:Humans; D008875:Middle Aged; D013612:Tachycardia, Ectopic Atrial / Q000209:etiology* / Q000503:physiopathology / Q000601:surgery*