Main characteristics including age, sex, weight, height, diabetes, arterial sheath diameters, and number of coronary catheters used were identical across the three groups. The rate of severe RAS was lowest in patients receiving isosorbide dinitrate (n=4, 3.8%), and verapamil (n=6, 5.5%), compared to diltiazem (n=12, 10.3%) but the difference was not statistically significant (p=0.128). The same results were found for minor RAS, respectively 17.4%, 16.0% and 25.6% (p=0.147). There was also no significant difference in term of safety events and pain sensation between the different groups. PCI was successful for all patients and no switch to transfemoral was reported in the entire population.