Radiofrequency ablation of the atrioventricular node and permanent pacemaker implantation in a patient with refractory atrial flutter and atrial fibrillation是什麼意思_Radiofrequency ablation of the atrioventricular node and permanent pacemaker implantation in a patient with refractory atrial flutter and atrial fibrillation在線翻譯_英語_讀音_用法_例句