Accordion effect in a thin-strut coronary stent

Area of Science:

• Cardiovascular engineering
• Medical device technology
• Interventional cardiology

Background:

• Modern coronary stents feature thinner struts for improved deliverability and conformability.
• Longitudinal compression, or the 'accordion effect,' is a recently recognized failure mode in these advanced stent designs.

Observation:

• A case of significant longitudinal stent compression is presented.
• The compression occurred following a post-dilatation balloon procedure, a common step in percutaneous coronary intervention.

Findings:

• The post-dilatation balloon was identified as the direct cause of the stent's accordion-like compression.
• This mechanical failure mode can compromise stent apposition and potentially lead to adverse clinical outcomes.

Implications:

• Highlights the mechanical risks associated with post-dilatation of contemporary thin-strut stents.
• Suggests the need for careful technique and potentially modified balloon usage during stent deployment.
• Underscores the importance of recognizing and managing stent compression to ensure procedural success and patient safety.