Aortic & peripheral vascular disease
Hypoechoic Halo Imaging Findings Following Femoropopliteal Artery Stent Implantation: Risk Factors and Clinical Outcomes
Authors' conclusion
A hypoechoic halo following a femoropopliteal stent procedure is a common occurrence associated with all studied stent types. The presence of a halo appears to be benign with no associated clinical sequelae or effect on target vessel revascularization rates within 1 year of stent implantation.
Study context
- Population
- Patients after femoropopliteal artery stent implantation (polymer-based drug-eluting, nonpolymer drug-coated or bare metal stent) in the IMPERIAL and EMINENT trialswith diagnostic duplex ultrasonography (DUS)
- Participants
- 659 patients
- Comparison
- Halo vs no halo after femoropopliteal stenting
- Primary endpoint
- Halo prevalence, risk factors and association with clinically driven target lesion revascularization and primary patency
Methodological detailscore laboratory DUS assessment
- Core laboratory DUS assessment
Primary result
As reported in the abstract
Halo prevalence · 6 months to 5 years post-stent implantation
Halo prevalence (patients with diagnostic DUS), present at all time intervals
20% to 35%
Further findings
Halo persistence (patients imaged at ≥2 visits)
- Halo typically persisted, with occasional regression and later development
Safety
| Outcome | OR (95% CI) | P value | |
|---|---|---|---|
| Clinically driven target lesion revascularization · 1 year | 1.27 (0.70–2.30) | P = 0.4240 | |
| Primary patency · 1 year | 0.68 (0.43–1.07) | P = 0.0927 | |
| 0.512Odds ratio (log scale) |
Original publication
Hypoechoic Halo Imaging Findings Following Femoropopliteal Artery Stent Implantation: Risk Factors and Clinical Outcomes. JACC Cardiovasc Interv. Published 10 July 2023. doi:10.
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