The novel electrophysiology of complex fractionated atrial electrograms: insight from noncontact unipolar electrograms.

Background: The noncontact mapping (NCM) system possesses the merit of global endocardial recording for unipolar and activation mapping.

Objective: We aimed to evaluate the unipolar electrogram characteristics and activation pattern over the bipolar complex fractionated atrial electrogram (CFAE) sites during atrial fibrillation (AF).

Methods: Twenty patients (age 55 +/- 11 years old, 15 males) who underwent NCM and ablation of AF (paroxysmal/persistent = 13/7) were included.

Gender differences of electrophysiological characteristics in focal atrial tachycardia.

Gender differences of supraventricular tachycardias such as atrioventricular nodal re-entry, atrioventricular re-entry, and atrial fibrillation have been reported. There is little evidence of the effect of gender on focal atrial tachycardia (FAT). The study consisted of 298 patients who were referred to this institution for radiofrequency catheter ablation of FAT from October 1992 to April 2008 and included 156 men (52%) and 142 women (48%).

Electrophysiologic characteristics and catheter ablation of focal atrial tachycardia with more than one focus.

Background: Information about the electrophysiologic characteristics and long-term outcome of catheter ablation in patients with multiple focal atrial tachycardia (AT) is limited.

Objective: The purpose of this study was to investigate the electrophysiologic characteristics and long-term outcome of catheter ablation in patients with multiple focal AT.

Methods: Two hundred fifty-one patients who were referred for radiofrequency catheter ablation of focal AT were included for analysis.