Stenting reduced strokes in asymptomatic stenosis
For severe carotid narrowing without recent symptoms, adding carotid-artery stenting to intensive medical management reduced stroke or death over 4 years, while surgery did not.
*Two parallel randomized controlled trials; Level 1b (OCEBM).
Citation
Brott TG, Howard G, Lal BK, et al.; CREST-2 Investigators. Medical Management and Revascularization for Asymptomatic Carotid Stenosis. N Engl J Med. 2026;394:219-231. doi:10.1056/NEJMoa2508800.
Background
Older trials favored carotid surgery for preventing stroke in people without symptoms, but modern medicines and newer procedures may have changed the balance of benefits and harms. This study tested whether adding a procedure to intensive medical management improves outcomes.
Patients
Adults ≥35 years with severe (≥70%) carotid-artery narrowing and no recent stroke-like symptoms (within 180 days), at 155 centers in 5 countries.
Intervention
(1) Carotid-artery stenting plus intensive medical management; (2) carotid endarterectomy plus intensive medical management.
Control
Intensive medical management alone.
Outcome
Primary: any stroke or death through day 44, or later stroke on the treated side through 4 years.
Follow-up Period
Up to 4 years (median 3.6 years in the stenting trial; 4.0 years in the surgery trial).
Results
| Significant outcome |
Medical management alone |
Procedure + medical management |
Effect |
| Primary composite at 4 years (stenting trial) |
6.0% |
2.8% |
Risk ratio 2.13 (95% CI, 1.15–4.39); absolute reduction 3.2%; NNT≈32 over 4 years |
| Stroke on treated side after day 44 (stenting trial; annual rate) |
1.7% per year |
0.4% per year |
Risk ratio 4.07 (95% CI, 1.78–9.31) |
| Stroke on treated side after day 44 (surgery trial; annual rate) |
1.3% per year |
0.5% per year |
Risk ratio 2.38 (95% CI, 1.13–5.00) |
Early (first 44 days) stroke or death events were uncommon but occurred more often in the procedure groups.
Primary analyses were intention-to-treat.
Limitations
Patients and clinicians were not blinded; medical treatment targets changed during the long trial; procedures done by highly certified operators; crossovers; few total events made results sensitive to small changes.
Funding
National Institutes of Health; U.S. Medicare agency; Regeneron donated medication.
Clinical Application
In severe asymptomatic carotid narrowing, prioritize intensive medical management; consider stenting (in experienced centers) for selected patients, but routine surgery is not clearly beneficial.