Intravascular Lithotripsy for Acute Stent Under-expansion in Calcified Coronary Lesions

Percutaneous coronary intervention (PCI) is the standard treatment for patients with coronary artery disease who have an indication for surgery. Coronary artery calcification not only makes stent delivery and expansion more difficult during PCI, but also increases the risk of vessel perforation. In addition, calcified plaque can lead to incomplete stent expansion, which increases the risk of in-stent restenosis and thrombosis. Although the technology and techniques of interventional devices continue to improve, heavily calcified lesions remain an important risk factor for PCI failure.

This study is a prospective, multicenter, randomized study. It is planned to select 40 cases of subjects with calcified plaque can lead to incomplete stent expansion who meet the inclusion/exclusion criteria. They are randomly dividing them into Intravascular lithotripsy treatment group and high-pressure balloon treatment group according to the ratio of 1:1. All subjects accept clinical follow-up after operation, at 30 days, 6 months, and 12 months after operation. Follow-up with angiography and OCT are conducted at 12 months. The primary endpoint was thickness of neointima at 12 months.