 Coronary angiogram CA procedures, with and without angioplasty, can be performed via vascular access in the wrist radial artery or leg femoral artery. Both radial and femoral artery vascular access have their advantages and disadvantages, but neither has yet been proven to have superior health outcomes. Often patients are eligible for both access sites but are not well informed regarding the potential advantages and disadvantages of each site. Vascular access in cardiac catheterization can be considered a grey zone, where the benefits and harms may have different levels of significance depending on the individuals preferences and values. For example, patients with significant back pain may not prefer the femoral approach as it requires the patient to lie flay for an extended period of time compared to the radial approach. 