Related Experiment Videos
Left atrial size changes in patients with paroxysmal lone atrial fibrillation. An echocardiographic follow-up
C Rostagno1, G Olivo, M Comeglio
1Istituto di Clinica Medica e Cardiologia, Università di Firenze, Italy.
Insights
In patients with lone atrial fibrillation (AF), left atrial enlargement does not occur initially. Atrial dilatation in lone AF develops only after the arrhythmia becomes chronic, suggesting early rhythm control may prevent it.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Imaging
Background:
- Left atrial enlargement is a known consequence of chronic atrial fibrillation (AF).
- Previous studies reported conflicting results regarding left atrial size changes in paroxysmal lone AF.
- Understanding the relationship between lone AF and left atrial size is crucial for predicting disease progression.
Purpose of the Study:
- To investigate the longitudinal changes in left atrial size in patients with paroxysmal lone AF.
- To determine if left atrial size changes correlate with arrhythmia recurrence.
- To assess the potential impact of early sinus rhythm restoration on preventing atrial enlargement.
Main Methods:
- Prospective follow-up of 20 patients with paroxysmal lone AF for an average of 30.3 months.
- Assessment of left atrial size at enrollment and during the follow-up period.
- Monitoring of arrhythmia recurrence rates.
Main Results:
- No significant changes in left atrial size were observed during the follow-up period.
- Left atrial size at enrollment did not differ between patients with and without yearly recurrences.
- Atrial size remained stable in both groups throughout the study.
- Arrhythmia recurred at least once yearly in 65% of patients.
Conclusions:
- Left atrial dilatation in lone AF appears to occur only after the arrhythmia becomes chronic.
- Early restoration of sinus rhythm may be a strategy to prevent the development of left atrial enlargement in lone AF.
- This finding suggests a potential window for intervention to interrupt the progression of atrial remodeling.
Abstract:
Left atrial enlargement has been demonstrated to occur as a consequence of the arrhythmia in patients with chronic atrial fibrillation (AF) in the absence of organic heart disease, whereas contrasting results have been reported in patients with paroxysmal lone AF. In the present investigation the behavior of left atrial size was followed up for an average period of 30.3 months in 20 patients with paroxysmal lone AF since their first arrhythmic episode. No significant changes in left atrial size were found at the end of the follow-up period. In 65% of patients the arrhythmia recurred at least once yearly. Left atrial size at enrollment was not significantly different in these patients from those without recurrences and did not change in either group during follow-up. The results suggest that in patients with lone AF left atrial dilatation occurs only after the arrhythmia becomes chronic. Early restoration of sinus rhythm may interrupt the vicious circle leading to atrial enlargement.