In-stent restenosis nine years after initial placement of a drug-eluting stent

Area of Science:

• Cardiology
• Interventional Cardiology
• Biomedical Engineering

Background:

• Drug-eluting stents (DES) are widely used to treat coronary artery disease.
• In-stent restenosis (ISR) is a known complication, but the temporal patterns for DES are not fully elucidated.
• Understanding delayed ISR is crucial for long-term patient management.

Observation:

• A patient presented with acute coronary syndrome.
• Severe, focal in-stent restenosis was identified within a drug-eluting stent.
• The stent had been implanted 9 years prior to the event.

Findings:

• This case demonstrates a rare instance of late-occurring in-stent restenosis.
• The restenosis developed significantly later than typically observed for drug-eluting stents.
• Severe restenosis occurred 9 years after the initial drug-eluting stent implantation.

Implications:

• The findings suggest that in-stent restenosis after DES implantation can manifest much later than previously thought.
• This case underscores the importance of long-term surveillance for patients with drug-eluting stents.
• Further research is warranted to understand the mechanisms and risk factors for very late in-stent restenosis.