Randomized Comparison of Radiation Exposure in Coronary Angiography Between Right Conventional and Left Distal Radial Artery Approach

Inclusion Criteria: * Patients who are a palpable right radial artery and left distal radial artery * The decision to participate voluntarily in this study and the written consent of the patient Exclusion Criteria: * Patients who are not palpable right radial artery and left distal radial artery * Patients who have arteriovenous fistula * Patients presenting with acute myocardial infarction * Patients who need to perform coronary angiography via femoral approach, such as shock state * Patients who have atrioventricular block on the electrocardiogram * Patients who have a plan to perform Ergonovine provocation test * Patients who need percutaneous coronary intervention * Patients who are not appropriate for this study