Relationship between left atrial change and atrial fibrillation

Objective To analyze the relationship between left atrial change and atrial fibrillation.Methods Fifty-four patients who had persistent atrial fibrillation in electrocardiogram and dynamic-electrocardiogram were enrolled in group A,52 patients who had paroxysmal atrial fibrillation in group B,and other 54 patients who only had P wave broaden in electrocardiogram in group C.Left atrial size was measured by ultrasoundcardiogram in all patients and the maximum P wave duration(Pmax),the minimum P wave duration(Pmin),P wave dispersion(Pdisp) were measured by 12-leads electrocardiogram in patients of group B and group C.Results The patients who had evident P incisurae and Pdisp increasing tend to suffer from fibrillation;the larger left atrium was,the higher the possibility of atrial fibrillation was,the left atrium diameter of persistent atrial fibrillation was larger than that of paroxysmal atrial fibrillation.Conclusion The patients with left atrial enlargement and Pmax and Pdisp increasing tend to suffer from atrial fibrillation.