The investigators are conducting a randomized clinical trial, having as a primary objective, to compare vascular access time between distal and proximal radial approach. Secondary objectives include comparing incidence of distal and proximal radial artery occlusion, at 24 hrs and 30 days. As a tertiary objective investigators will compare the preference of the patients for each access in subsecuent interventional procedures.

Randomised Clinical Trial / Equivalence Model Permutted block asignation 1:1 Statistical Power 90% and Significance 2.5%. Sample Loss estimation - 15% Chi-square to categorical and T Student to numerical variables. Logistic regression binomial for adverse outcomes. If needed, an intention to treat analysis will be performed.

Inclusion Criteria:

• Patients over 18 years
• Clinical indication for coronary angiography / angioplasty
• Palpable radial and distal radial pulse
• Previous clinical Barbeau test
• Radial and distal radial patency via vascular ultrasound
• 24-hour and 30-day follow-up feasibility

Exclusion Criteria:

• Previous vascular punctions in the studied anatomic site
• Artery introductor relationship
• Arteriovenous fistula
• Current treatment with oral anticoagulants
• Contraindication for Heparin
• Incomplete medical records
• Vascular access sheath - radial artery mismatch
• Distal radial or ulnar fracture history

(planned) March 2022