The objectives of this study are to demonstrate the safety and efficacy of the new 6Fr sheath (Glidesheath slender; Terumo, Tokyo,Japan ; GSS) compared with the contemporary 5Fr sheath (Hydrophilic coating sheath from Terumo; Tokyo, Japan (standard of care ; SOC).

Inclusion Criteria:

• Patient is able to verbally acknowledge an understanding of the associated risks, benefits and treatment alternatives and he or his legally authorized representative provides written informed consent prior to the randomization, as approved by the appropriate IRB.
• Patient who is expected to diagnose by coronary artery angiography or followed by PCI.
• Patient must agree to undergo all protocol-required follow-up examinations.
• Patient who can accept radial access.

Exclusion Criteria:

• Patient has other medical illness (e.g., cancer or congestive heart failure) that may cause non-compliance with the protocol, confound the data interpretation or is associated with a limited life expectancy (i.e., less than one year).
• Hemodialysis patient
• STEMI