18. 經導管高頻電燒術(radiofrequency ablation)在下列何種不整脈中尚未確立其地位?
(A) Atrial reentrant tarchycardia
(B) Atrial flutter (typical form)
(C) Atrial fibrillation
(D) AV nodal reentrant tachycardia 及 AV reentrant tachycardia (WPW syndrome)
(E) Idiopathic ventricular tarchycardia