Brubaker S, et al. - Researchers planned this review to evaluate the literature and controversies concerning treatment of atrioventricular-nodal-reentry tachycardia (AVNRT) in the Emergency Department (ED). They recognize several studies showing that nondihydropyridine calcium channels (verapamil and diltiazem) are equally as efficacious as adenosine in converting AVNRT to sinus rhythm, without the negative (albeit short-lived) side effects. They noticed a low risk for hypotension if given over 20 min.