[Bioresorbable coronary scaffolds: follow-up]

Area of Science:

• Cardiovascular research
• Biomaterials science
• Interventional cardiology

Background:

• Bioresorbable scaffolds (BRS) offer an alternative to traditional metal stents.
• Early studies showed promising short-term outcomes for BRS.
• The AIDA study investigated the safety and efficacy of the Absorb BRS.

Purpose of the Study:

• To compare the risk of stent thrombosis between the Absorb BRS and the XIENCE metal stent.
• To identify potential causes for stent thrombosis associated with BRS.
• To propose strategies for mitigating stent thrombosis risk with BRS.

Main Methods:

• Comparative analysis of stent thrombosis rates from the AIDA study.
• Evaluation of short-term and long-term outcomes.
• Review of factors contributing to acute, subacute, and late stent thrombosis.

Main Results:

• The Absorb BRS demonstrated a nearly threefold increased risk of stent thrombosis versus the XIENCE metal stent.
• Stent thrombosis occurred both in the short-term and long-term follow-up periods.
• Potential causes include inadequate dual antiplatelet therapy, suboptimal implantation, and scaffold degradation.

Conclusions:

• Current bioresorbable scaffolds, like Absorb, face challenges with increased stent thrombosis risk.
• Optimized implantation protocols and extended dual antiplatelet therapy are recommended.
• Further research and technical advancements are crucial for the future of bioresorbable coronary stents.