Nonautomatic Focal Atrial Tachycardia:x
- 1 March 2003
- journal article
- Published by Wiley in Pacing and Clinical Electrophysiology
- Vol. 26 (3), 736-742
- https://doi.org/10.1046/j.1460-9592.2003.00125.x
Abstract
Nonautomatic focal atrial tachycardia (NAFAT) is a rare and poorly understood arrhythmia either due to microreentry or triggered mechanism. NAFAT was defined as a focal atrial tachycardia which was inducible with pacing maneuvers in the electrophysiology lab. We reviewed the charts and EP study reports of all 38 patients with NAFAT, who underwent an EP study at our center between April 1994 and September 2000. Patients' were predominantly female (n = 31, 82%), aged 11-78 years (median 46). The mean age at presentation was 31 years (range 7-71 years). None of the patients had structural heart disease or had undergone prior heart surgery. Electroanatomic mapping (EAM) was performed in 22 patients and showed no scars in the atrium. A total of 45 foci were identified (range 1-3 foci/patient). Anatomically NAFAT foci were predominantly right atrial (n = 35) rather than left (n = 10). The NAFAT cycle length ranged from 270 to 490 (mean +/- SD; 380 +/- 69 ms) and was significantly lower in patients younger than 24 years of age. Ablation, attempted for 42 foci was successful in 33 (79%). The success rate in the EAM group was 20/25 foci (80%) compared to 13/18 (72%) in the non-EAM group. In conclusion, NAFAT is a rare arrhythmia which predominantly affects women with no other associated cardiac disease. It mainly occurs in the right atrium, affects all ages and is amenable to catheter ablation.Keywords
This publication has 13 references indexed in Scilit:
- Differential Effects of Adenosine on Focal and Macroreentrant Atrial TachycardiaJournal of Cardiovascular Electrophysiology, 1999
- Magnetic Electroanatomical Mapping for Ablation of Focal Atrial TachycardiasPacing and Clinical Electrophysiology, 1998
- Effects of Gender on Cardiac ArrhythmiasJournal of Cardiovascular Electrophysiology, 1998
- Focal Atrial Tachycardia:.Journal of Cardiovascular Electrophysiology, 1998
- A Focal Source of Atrial Fibrillation Treated by Discrete Radiofrequency AblationCirculation, 1997
- To Fumble Flutter or Tackle "Tach"? Toward Updated Classifiers for Atrial TachyarrhythmiasJournal of Cardiovascular Electrophysiology, 1996
- Sustained atrial tachycardia in adult patients. Electrophysiological characteristics, pharmacological response, possible mechanisms, and effects of radiofrequency ablation.Circulation, 1994
- Mechanism-specific effects of adenosine on atrial tachycardia.Circulation, 1994
- “AV Nodal” Reentry:Journal of Cardiovascular Electrophysiology, 1993
- Age at onset and gender of patients with different types of supraventricular tachycardiasThe American Journal of Cardiology, 1992