Outcomes after radiofrequency catheter ablation of atrial tachycardia

Electrophysiologic Characteristics and Topographic Distribution of Focal Atrial Tachycardias in Dogs

“…The result was similar to the same measure in people (À21 and À51 ms). 4,7,15,36,[38][39][40][41][42][43] The presence of negative unipolar recordings with QS configuration was associated with a correct identification of the target site of successful ablation, with a reported acute success rate of 86%. 33,40 In our study, all target areas for ablation presented this unipolar deflection morphology.…”

“…In our opinion the difference in the occurrence of TICM found in our population of dogs, when compared with human beings, can be because of the small number of dogs studied, because ventricular rate of FATs observed in this study ranged between 164 and 270 bpm and was higher than the one reported in people (130-240 bpm). 4,8,36,[38][39][40][41] The mechanism of FAT can be determined by the induction mode. [4][5][6] Reported incidence of FATs caused by abnormal automaticity in people ranges between 7 and 16%, while nonautomatic FATs ranged between 4 and 20%.…”

ACC/AHA/ESC Guidelines for the Management of Patients With Supraventricular Arrhythmias—Executive Summary

“…119,[125][126][127][128][129] In these series, left atrial origins accounted for 18% of ATs, and 10% of patients had multiple foci. The incidence of significant complications is low (1% to 2%) in experienced centers, but includes cardiac perforation, damage to the right and left phrenic nerves and sinus node dysfunction.…”

Focal Atrial Tachycardia

“…3) Focal AT can be diagnosed in children or adults without any structural heart disease, but in the elderly it is often associated with cardiovascular disease. [4][5][6][7][8][9][10][11][12][13][14][15][16][17] The persistent or incessant form of focal AT can cause congestive heart failure due to tachycardia-induced cardiomyopathy, which is more frequent in pediatric patients than in adults. 18,19) …”

“…The earliest activation timing at the successful ablation site is usually at least 30 ms before the P-wave onset, but may vary greatly among the patients. [4][5][6][7][8][9][10][11][12][13][14][15][16][17] Due to the conventional endocardial mapping technique has limited resolution, several specialized mapping catheters has been developed. A self-expandable multielectrode basket catheter (Constellation, Boston Scientific) can also facilitate for simultaneous global atrial endocardial mapping to rapidly identify the AT origin and to navigate the ablation catheter inside the basket catheter (Astronomer System, Boston Scientific).…”