The aim of this study is to investigate the relation between the previous presence of endothelial dysfunction and the development of radial artery vasospasm during the trans-radial coronary evaluation.

All patient will undergo pre procedural endoPAT assessment for endothelial dysfunction

Inclusion Criteria:

Patients without angiographic proof of coronary disease, with scheduled elective coronary angiographic evaluation by radial approach.

Exclusion Criteria:

Impossibility to perform radial approach; abnormal Barbeau test result (type C and D); previous important trauma of the upper limbs; presence of fistule for renal dialysis; lymphedema; acute myocardial infarction, severe valvular heart disease; patients with NYHA class III and IV heart failure; malignancy; active myocarditis; HIV infection or immunodeficiency state; chronic viral infection; acute systemic infection requiring antibiotics; systemic inflammatory disease; Raynaud's syndrome; refusal to sign the informed consent form. All participants must give a written informed consent

Patients planned for elective trans-radial cath