Repeated in-stent occlusion of RCA: a case report

Area of Science:

• Cardiology
• Interventional Cardiology
• Pharmacology

Background:

• Recurrent in-stent occlusion after percutaneous coronary intervention (PCI) is uncommon but challenging.
• Conventional dual antiplatelet therapy may be insufficient in complex cases.
• Understanding mechanisms of repeated in-stent occlusion is crucial for treatment strategy.

Purpose of the Study:

• To report a case of recurrent in-stent occlusion despite dual antiplatelet therapy.
• To explore potential adjunctive treatments for managing complex in-stent thrombosis.
• To highlight considerations for PCI in patients with autoimmune diseases.

Main Methods:

• A case presentation of a 74-year-old woman with rheumatoid arthritis and ST-elevation myocardial infarction.
• Underwent PCI with three stents in series in the right coronary artery.
• Received dual antiplatelet therapy, later supplemented with colchicine.

Main Results:

• The patient experienced three episodes of in-stent occlusion within 9.5 months, requiring repeat PCI.
• Following the addition of colchicine, no adverse cardiovascular events occurred during a six-month follow-up.
• This suggests a potential benefit of colchicine in preventing recurrent stent thrombosis.

Conclusions:

• Tandem stenting in coronary turning points, like the right coronary artery, increases thrombus formation risk.
• Re-stenting may not prevent recurrent thromboembolism, possibly due to malapposed stent segments.
• Further research is needed on combining colchicine with dual antiplatelet therapy and statins for autoimmune disease patients.
• Intracavitary imaging guidance is recommended to avoid stent stacking and minimize placement at vascular turns.