Predictive factors for persistence of atrial fibrillation after mitral valve operation

• Published in: The Annals of thoracic surgery Vol. 67; no. 3; pp. 614 - 617
• Main Authors: Kalil, Renato A.K, Maratia, Claudia B, D’Ávila, Alessandro, Ludwig, Fernando B
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.03.1999; Elsevier Science
• Subjects: Adolescent; Adult; Aged; Atrial Fibrillation - etiology; Biological and medical sciences; Chronic Disease; Female; Follow-Up Studies; Humans; Male; Medical sciences; Middle Aged; Mitral Valve Insufficiency - complications; Mitral Valve Insufficiency - physiopathology; Mitral Valve Insufficiency - surgery; Mitral Valve Stenosis - complications; Mitral Valve Stenosis - physiopathology; Mitral Valve Stenosis - surgery; Retrospective Studies; Risk Factors; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Surgery of the heart; Human; Postoperative; Mitral valve; Prognosis; Arrhythmia; Atrial fibrillation; Cardiovascular disease; Cardioversion; Exploration; Excitability disorder; Chronic; Treatment; Cardiac valvular disease; Heart disease; Surgery; Complication; Preoperative; Predictive factor; Mitral valve disease
• ISSN: 0003-4975; 1552-6259
• DOI: 10.1016/S0003-4975(98)01241-7

Background. The majority of patients operated on for mitral valve disease with chronic atrial fibrillation (AF) do not recover sinus rhythm with conventional postoperative treatment. The maze procedure may be used in these circumstances. To define the precise indications for the maze procedure, it would be necessary to identify those patients based on preoperative factors. Methods. A retrospective study was undertaken on 100 consecutive patients operated on for mitral valve disease in chronic AF. The return to sinus rhythm was analyzed with relation to age, gender, AF duration, left atrial size, left ventricular ejection fraction, lesion type, valve procedure, associated procedures, and reoperation. Results. At late follow-up (more than 1 year) 26 (26%) patients presented sinus rhythm and 74 (74%) remained in AF. Statistical single parametric analysis demonstrated that mitral stenosis was a risk factor for maintaining AF, whereas regurgitation was more associated to sinus rhythm recovery. There was no relation with the other parameters with return to sinus rhythm. It should be noted, however, that 96% of this series had AF for more than 6 months preoperatively. Conclusions. The majority of patients with mitral valve disease remain in AF and this may justify the association of maze procedure. Pure regurgitation may be a single predictor for return to sinus rhythm after mitral valve operation in chronic AF.