Increase in radionuclide left ventricular ejection fraction after cardioversion of chronic atrial fibrillation in idiopathic dilated cardiomyopathy.

摘要: To assess the potential improvement in left ventricular ejection fraction after cardioversion of chronic atrial fibrillation to sinus rhythm idiopathic dilated cardiomyopathy, we studied prospectively 17 patients, aged 58 +/- 6 years, by radionuclide angiocardiography at rest. Left was determined before treatment and a mean delay 4.7 months cardioversion. Return obtained 12 pharmacologically or electrical Five patients remained fibrillation. No clinical, echocardiographic haemodynamic finding could predict success In fibrillation, did not change significantly: 30.0 9.1% (19 44%) first evaluation 29.5 8.3% (22 41%) months. After successful cardioversion, improved from 32.1 5.3% (24 52.9 9.7% (37 71%) (P less than 0.001). The difference 20.8 11.3% normalized 50% (6/12) patients. There significant reduction cardiothoracic ratio on chest X-rays end-diastolic diameter echocardiography; fractional shortening increased (27.7 4.3% vs 20.3 2.7%, P 0.01). A third realized 11.7 with Sinus present 83% (10/12) patients: seven were reevaluated angiography. function observed still present. two recurrence there severe deterioration systolic function.(ABSTRACT TRUNCATED AT 250 WORDS)