Appearance of atrial sound after reversion of atrial fibrillation.

To determine the incidence and time of onset of the atrial sound after reversion of atrial fibrillation in patients with myocardial disease, 12 patients with arteriosclerotic heart disease and 4 patients with primary myocardial disease were followed with serial auscultation as well as daily simultaneous apical phonocardiogram, apex cardiogram, and lead II electrocardiogram. Their average age was 52·3 years. Each patient had been in atrial fibrillation for 6 months to 2 years' duration; 13 were reverted to sinus rhythm with DC capacitor discharge and 3 with quinidine sulphate. (). [ABSTRACT FROM PUBLISHER]