Transradial approach has been preferred for coronary angiography (CAG) and percutaneous coronary intervention (PCI) due to several advantages, including decreased associated vascular complication, patients' convenience, and early ambulation compared with transfemoral approach. With these advantages, current guidelines support that radial access is recommended for CAG and PCI in acute myocardial infarction (AMI) patients with and without ST-elevation if performed by an experienced radial operator. Recently, Kiemeneij introduced a distal radial artery approach, called the snuffbox approach, and several studies have been published. However, the feasibility of PCI via snuffbox approach is still concerned due to the lack of data. Moreover, optimal hemostasis duration for PCI via snuffbox approach has not been investigated, even though shorter hemostasis duration would be expected compared with the conventional radial approach as diameter of snuffbox radial artery was significantly smaller than conventional radial artery. In addition, there are few data regarding the feasibility of PCI via snuffbox approach. Therefore, the aim of the study is to evaluate the optimal hemostasis duration for PCI via snuffbox approach.

Inclusion Criteria:

• Patients ≥18 years old requiring PCI
• Patients who are palpable distal radial arter
• The decision to participate voluntarily in this study and the written consent of the patient

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.
• Patients who are not appropriate for this study

A total of 250 patients who undergoing PCI via snuffbox approach will be recruited from 3 centers (with potential to expand number of centers) participating in patients with ischemic heart disease (IHD).