[Chronic atrial fibrillation in adults: direct current cardioversion or medical cardioversion].

To study cardioversion modalities of atrial fibrillation, we had a look to 100 cases hospitalized in Mongi slim cardiologic department during the period lasting from January 1993 to July 2001. Medical cardioversion (with amiodarone) was performed in 47 patients and electrical cardioversion in 53 patients. Atrial fibrillation was 17 months old. Vavular heart disease was the main etiology (65%). The primary success rate of medical cardioversion (73%) was equivalent to electrical cardioversion (70%). Oldness of atrial fibrillation was the only predictive factor of failure of cardioversion.