Defining a new standard for IVUS optimized drug eluting stent implantation: the PRAVIO study

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Medical Imaging

Background:

• Intravascular ultrasound (IVUS) assessment of drug-eluting stents (DES) frequently reveals underexpansion and malapposition.
• Current criteria for optimal stent deployment are poorly defined, especially for long and complex lesions.

Purpose of the Study:

• To assess new criteria for optimal DES deployment using IVUS guidance.
• To compare IVUS-guided stent implantation with angiographic guidance in complex lesions.

Main Methods:

• A prospective observational study involving 113 complex lesions treated with IVUS-guided DES implantation.
• Optimization defined as achieving ≥70% of the post-dilation balloon's cross-sectional area (CSA) based on vessel size.
• IVUS-guided lesions were matched with angiographically treated lesions to compare final minimum lumen diameter (MLD).

Main Results:

• Final MLD was significantly larger in the IVUS-guided group (3.09 mm) compared to the angiographic-guided group (2.67 mm; P < 0.0001).
• No procedural complications were associated with IVUS use.
• Achieved minimum stent CSA varied with post-dilation balloon size, ranging from 4.62 mm² to 9.87 mm².

Conclusions:

• Proposed IVUS criteria based on vessel remodeling safely increase final MLD beyond previously published results.
• IVUS guidance leads to significantly larger MLD compared to angiographic guidance.
• A randomized trial is underway to further validate these IVUS-based optimization criteria.