Safe and effective direct implantation of a new stent through 5F. guiding catheters with delivery from the radial artery: Initial results of a prospective registry

OBJECTIVES: To evaluate the safety and efficacy of the direct implantation of a new stent via the radial artery through a 5F. guiding catheter. Background advances in the design of stents and stent delivery systems have facilitated the performance of direct stenting and the use of thinner guiding catheters. METHODS: This registry enrolled prospectively 125 patients (147 lesions, 20.4% AHA/ACC class B2/C) who underwent elective percutaneous coronary revascularization procedures for stable or unstable angina between November 2000 and March 2001. RESULTS: Cannulation of the radial artery was attempted in 92.7% and was successful in 91.0% of cases. Direct stenting was successful in 88.7% of lesions and procedural success was 99.3%. In-hospital major adverse cardiac events occurred in 1.6% of cases (one death, one semi-urgent coronary artery bypass operation). The final rate of successful stent implantation through 5F. guiding catheters was 96.7%. There were no accesssite-related complications. Failure to cross the lesion occurred in 10% of attempts. At a mean follow-up of 7 ± 2.8 months after discharge from hospital, 79% of patients had remained free of angina, and 89% had remained free of ischemic events. CONCLUSIONS: Direct stenting with a new stent design was safe, effective, and could be accomplished through 5F. guiding catheters with favorable longterm clinical outcomes.