Postcath Radial Arterial Clamp Time In the CAth Lab

Inclusion Criteria: * All patients who require cardiac catheterization via the radial approach for the investigation and treatment of coronary artery disease. * Patients must have evidence of pre-procedural radial artery patency using Barbeau test. * Patients must be able to give informed consent Exclusion Criteria: * Evidence of pre-procedural radial artery thrombosis * Inability to give informed consent * Patient desire not to participate in the study * Emergent procedures when the delay associated for obtaining informed consent may affect patient outcome