Comparison of Effectiveness of Ranolazine Plus Amiodarone Versus Amiodarone Alone for Conversion of Recent-Onset Atrial Fibrillation
The American Journal of Cardiology, 08/20/2012
Fragakis N et al. – Addition of ranolazine to standard amiodarone therapy is equally safe and appears to be more effective compared to amiodarone alone for conversion of recent–onset Atrial Fibrillation (AF).Methods
- The authors enrolled 51 consecutive patients with AF (<48–hour duration) eligible for pharmacologic cardioversion.
- Patients (33 men, 63 ± 8 years of age) were randomized to intravenous amiodarone for 24 hours (group A, n = 26) or to intravenous amiodarone plus oral ranolazine 1,500 mg at time of randomization (group A + R, n = 25).
- The 2 groups were well balanced with respect to clinical characteristics and left atrial diameter.
- Conversion within 24 hours (primary end point) was achieved in 22 patients (88%) in group A + R versus 17 patients (65%) in group A (p = 0.056).
- Time to conversion was shorter in group A + R than in group A (9.8 ± 4.1 vs 14.6 ± 5.3 hours, p = 0.002).
- According to Cox regression analysis, left atrial diameter and A + R treatment were the only independent predictors of time to conversion (hazard ratio 5.35, 95% confidence interval 2.37 to 12.11, p <0.001; hazard ratio 0.81, 95% confidence interval 0.74 to 0.88, p <0.001, respectively).
- There were no proarrhythmic events in either group.