1:1 atrial-flutter. Prevalence and clinical characteristics

Area of Science:

• Cardiology
• Electrophysiology
• Epidemiology

Background:

• Epidemiology of 1:1 atrial flutter (AFL) is not well-understood.
• Identifying predisposing conditions for 1:1 AFL is crucial for patient management.

Purpose of the Study:

• To determine the prevalence of 1:1 AFL in patients referred for ablation.
• To identify factors predisposing to 1:1 AFL.

Main Methods:

• A consecutive cohort of 1037 patients undergoing AFL ablation was analyzed.
• Patients were followed for an average of 3 years post-ablation.

Main Results:

• The prevalence of 1:1 AFL was 8%, with these patients being younger and having less heart disease.
• Absence of heart disease, history of atrial fibrillation, and use of Class I antiarrhythmics were associated with 1:1 AFL.
• Prognosis, including ablation failure, complications, and subsequent atrial fibrillation, was similar between groups.

Conclusions:

• 1:1 AFL occurs in 8% of patients undergoing ablation.
• Younger age, less heart disease, prior atrial fibrillation, and Class I antiarrhythmic use are linked to 1:1 AFL.
• The long-term prognosis for patients with 1:1 AFL is comparable to those without.