Long-term outcome following coronary stent embolization or misdeployment

Area of Science:

• Cardiology
• Interventional Cardiology
• Medical Devices

Background:

• Coronary stent embolization and misdeployment are infrequent but serious complications.
• Understanding the outcomes associated with these events is crucial for patient management.

Purpose of the Study:

• To compare the long-term outcomes of patients experiencing coronary stent embolization or misdeployment with those who did not.
• To identify predictors of stent embolization and analyze the sequelae of intra-coronary versus extra-coronary embolization.

Main Methods:

• A case-control study matching 23 patients with stent embolization/misdeployment to 23 controls.
• Analysis of procedural data, including predilation pressure, procedure time, fluoroscopy time, and dye volume.
• Assessment of major adverse coronary events (MACE) during a mean follow-up of 36 months.

Main Results:

• Higher predilation pressure (>10 atm) and lesion angulation >45 degrees predicted stent embolization.
• The embolization group experienced significantly more MACE (23 vs. 7, p=0.04).
• Intracoronary stent embolization was associated with poor outcomes (bypass surgery, myocardial infarction, repeat interventions, death), while extracoronary embolization had minimal sequelae.

Conclusions:

• Intracoronary stent embolization/misdeployment is linked to significantly worse long-term clinical outcomes.
• Extracoronary stent embolization is generally associated with fewer adverse events.
• Procedural factors like high predilation pressure and complex lesion anatomy increase the risk of stent embolization.