Novel Angioplasty Using Coronary Accessor (NAUSICA)

• success of PCI [ Time Frame: within 2 days after TRI ] [ Designated as safety issue: Yes ]
• MACE [ Time Frame: within 2 days after TRI ] [ Designated as safety issue: Yes ]
  Defined as a composite of cardiac death, myocardial infarction, and target lesion revascularization
• Puncture-site bleeding complications [ Time Frame: within 2 days after TRI ] [ Designated as safety issue: Yes ]
• Fluoroscopy time [ Time Frame: At the end of TRI ] [ Designated as safety issue: Yes ]
• Dose of radiation exposure [ Time Frame: At the end of TRI ] [ Designated as safety issue: Yes ]
• Contrast dye volume [ Time Frame: At the end of TRI ] [ Designated as safety issue: Yes ]
• Procedure time [ Time Frame: At the end of TRI ] [ Designated as safety issue: Yes ]

To investigate the advantage of using a 4Fr guiding catheter over a 6 Fr, frequencies of radial artery occlusion after transradial coronary intervention (TRI) will be evaluated. Radial artery occlusion rate in 4 Fr TRI group is expected to be not more than that in 6Fr groups.

Prerequisites for TRI were a sufficiently pulsating radial artery and presence of an ulnar pulse with a sufficient palmar arch, as evidenced by the absence of digital ischemia according to the Allen's test. Exclusion criteria for the current study included planned use of a cutting balloon, rotational atherectomy, directional coronary atherectomy, and intravascular ultrasound, which were not compatible with 4-Fr catheter.

Patency of the radial artery after TRI will be evaluated by pulsation of the radial artery, and frequencies of which will be compared between those receiving 4Fr vs 6 Fr coronary interventions.

• No Intervention: 6 Fr TRI
  TRI will be performed using a 6-Fr guiding catheter.
• Active Comparator: 4-Fr TRI
  TRI will be performed using a 4-Fr guiding catheter.
  Intervention: Device: TRI using a 4-Fr guiding catheter

Inclusion Criteria:

• Prerequisites for transradial intervention were a sufficiently pulsating radial artery and presence of an ulnar pulse with a sufficient palmar arch, as evidenced by the absence of digital ischemia according to the Allen's test.

Exclusion Criteria:

• Exclusion criteria included planned use of a cutting balloon, rotational atherectomy, directional coronary atherectomy, and intravascular ultrasound, which were not compatible with 4-Fr catheter.