Rationale and study design on the effectiveness of vasodilators and topical local anesthetics to prevent radial spasm. The E-RADIAL trial

ABSTRACT Introduction and objectives: When using radial access established as the approach of choice to perform coronary angiographies it is important to avoid radial spasm as it is the leading cause of access failure. This study aims to determine whether a topical anesthetic cream reduces the rate of radial spasm, as well as the increased gain with the use of different vasodilators. Methods: Randomized, double-blind, and single-center clinical trial. Patients will be randomized to receive the anesthetic cream vs placebo, and 4 types of different vasodilator cocktails will be used in each group. The presence—or not—of radial spam and caliper gain will be analyzed. Conclusions: Demonstrating the efficacy of the anesthetic cream, and different vasodilators to reduce radial spam would have a significant clinical impact, and justify its systematic use when performing coronary angiographies. Registered at The Spanish Agency of Medicines and Medical Devices (AEMPS) EudraCT number: 2017-000321-12.