Inclusion Criteria:  Patients, ≥ 20 years of age, who were diagnosed with ischemic heart disease requiring percutaneous coronary intervention (PCI) Patients who are palpable distal radial artery The decision to participate voluntarily in this study and the written consent of the patient Patients who planned to perform PCI using a 7-Fr thin wall sheath  Exclusion Criteria:  Patients who are not palpable distal radial artery Female of childbearing potential, who possibly plans to become pregnant any time after enrollment into this study Pregnancy Patients who are not appropriate for this study