Scar-related right atrial macroreentrant tachycardia in patients without prior atrial surgery: Electroanatomic characterization and ablation outcome

Abstract

Background: Few descriptions of right atrial macroreentrant atrial tachycardia involving regions of spontaneous "scar" have been reported. Objectives: We describe the electrocardiographic, electrophysiologic, and electroanatomic characteristics of an unusual RA macroreentrant atrial tachycardia in eight patients with spontaneous RA scarring. Methods: Eight of 286 patients with macroreentrant atrial tachycardia treated with radiofrequency ablation had RA spontaneous scarring and underwent conventional electrophysiologic studies and electroanatomic mapping. Results: Eight patients (age 53 ± 12 years) had symptoms for 58 ± 62 months and had not responded to 2.5 ± 0.8 antiarrhythmic drugs and 1...