Pathophysiology of Coronary Restenosis

Area of Science:

• Cardiovascular Medicine
• Biomedical Engineering

Background:

• In-stent restenosis (ISR) remains a significant clinical challenge despite advancements in drug-eluting stents (DESs).
• While DESs reduce neointimal hyperplasia, delayed endothelial healing and neoatherosclerosis are unresolved complications contributing to ISR.
• Current treatment strategies for ISR include repeat DES implantation and drug-coated balloons.

Purpose of the Study:

• To review the current understanding of ISR pathophysiology.
• To highlight the role of advanced imaging techniques in ISR assessment.
• To discuss optimal therapeutic strategies and future directions for ISR management.

Main Methods:

• Literature review of recent advances in ISR.
• Analysis of current imaging modalities for lesion assessment.
• Evaluation of existing and emerging treatment options for ISR.

Main Results:

• Despite DES use, ISR complications like delayed healing and neoatherosclerosis persist.
• Noninvasive and intravascular imaging have improved ISR lesion characterization.
• Effective treatment selection requires a thorough understanding of ISR pathophysiology and imaging findings.

Conclusions:

• Optimizing ISR treatment necessitates a deep understanding of its underlying mechanisms.
• Advanced imaging plays a crucial role in guiding therapeutic decisions for ISR.
• Future research should focus on developing novel DESs and therapies to address unresolved ISR challenges.