Pressure-mediated versus pharmacologic treatment of radial artery spasm during cardiac catheterisation: a randomised pilot study.

Aims: The aim of the study was to determine the effectiveness of a novel strategy to treat radial artery spasm (RAS).

Methods And Results: We conducted a prospective, randomised, single-centre, open-label trial comparing a novel strategy of pressure-mediated dilatation versus intra-arterial administration of a combination of nitroglycerine plus verapamil for the treatment of RAS. The primary endpoint was radial artery intraluminal diameter acute gain assessed by quantitative radial angiography.