Left atrial isolation for chronic atrial fibrillation caused by mitral valvular stenosis and regurgitation

: Surgical isolation of the left atrium was performed for the treatment of chronic atrial fibrillation secondary to mitral valvular disease in a 65-year-old woman who underwent mitral valvular replacement. Left atrial isolation was simple procedure, prolonging the usual paraseptal atriotomy toward the both mitral valvular commissures anteriorly and posteriorly. The incision was conducted two centimeters apart from the mitral valve annulus, and cryoablation was added at the edges to ensure isolation of the residual left atrium. We suggest performing this simple procedure in patients with chronic atrial fibrillation undergoing mitral valvular replacement, in whom correction of irregular beat and compromised hemodynamics can be obtained.