Comparison of the Systematic Versus the Selective Use of Heparin for the Prevention of Radial Artery Occlusion

Inclusion Criteria: * Any patient referred for a diagnostic transradial catheterism Exclusion Criteria: * Unable to understand study design or provide informed consent * Unable to receive antiplatelet therapy with aspirina and/or clopidogrel-prasugrel and/or ticagrelor and intravenous anticoagulant derived from heparine or bivalirudine * Local condition such as hematoma or pseudo-aneurims precluding radial or ulnar access. * Presence of plethysmographic waveform with simultaneous radial and ulnar occlusive compression (due to colaterals or interouseous artery) precluding the evaluation of patent hemostasis.