Recovery, selection and procedural judgement: Biplane Weekly No. 1
A month of stroke trials, carotid cognition and procedural evidence, with learning opportunities ahead.
Takeaways
- 01LAIS provided evidence of improved excellent recovery with loberamisal, but excluded patients with planned or completed thrombectomy.
- 02The ANGEL-TNK follow-up supports a one-year benefit of intra-arterial tenecteplase for excellent recovery; independence, disability shift and mortality did not differ significantly.
- 03ATTENTION LATE did not demonstrate benefit from intravenous tenecteplase before directly admitted, late-window basilar thrombectomy; this does not establish equivalence.
- 04Neither stenting nor endarterectomy improved tested cognition versus intensive medical management in the separate CREST-2 trials.
- 05The tiny-aneurysm registry describes the risks of selected treated lesions; it cannot establish a benefit from treatment over surveillance.
LAIS provides new randomised evidence for loberamisal in acute stroke, while two tenecteplase trials examine different questions around thrombectomy. The month also brings randomised evidence for carotid counselling and observational reports that make procedural selection more concrete: tiny aneurysms, deterioration during transfer and paediatric venous rescue. A contrast technique for dural fistulas closes the edition with a practical anatomical question.
The carotid trials offer a particularly useful counselling result: improved cognition should not be promised as a benefit of revascularisation. The procedural series offer a different kind of value, making complications and changing clinical circumstances visible before an intervention is chosen.
Recovery, selection and procedural judgement
At a glance
- 01LAIS provided evidence of improved excellent recovery with loberamisal, but excluded patients with planned or completed thrombectomy.
- 02The ANGEL-TNK follow-up supports a one-year benefit of intra-arterial tenecteplase for excellent recovery; independence, disability shift and mortality did not differ significantly.
- 03ATTENTION LATE did not demonstrate benefit from intravenous tenecteplase before directly admitted, late-window basilar thrombectomy; this does not establish equivalence.
- 04Neither stenting nor endarterectomy improved tested cognition versus intensive medical management in the separate CREST-2 trials.
- 05The tiny-aneurysm registry describes the risks of selected treated lesions; it cannot establish a benefit from treatment over surveillance.
LAIS provides new randomised evidence for loberamisal in acute stroke, while two tenecteplase trials examine different questions around thrombectomy. The month also brings randomised evidence for carotid counselling and observational reports that make procedural selection more concrete: tiny aneurysms, deterioration during transfer and paediatric venous rescue. A contrast technique for dural fistulas closes the edition with a practical anatomical question.
In this edition · 8 stories
LAIS: evidence of improved recovery with loberamisal
- Evidence
- RCT – primary results
- Strength
- Moderate
- Practice impact
- Potentially practice changing
LAIS randomised 998 patients at 32 Chinese centres to intravenous loberamisal or placebo alongside standard care. Treatment began within 48 hours and continued for ten days; 997 patients entered the primary analysis. Participants were aged 18–80 years with NIHSS 7–20; median NIHSS was eight. At 90 days, mRS 0–1 occurred in 350/502 (69.7%) versus 279/495 (56.3%): RR 1.24 (95% CI 1.12–1.36), an absolute difference of 13.28 percentage points.
Serious adverse events occurred in 8.6% versus 10.7%, and mortality in 1.2% versus 2.0%. These descriptive safety results accompany a substantial recovery signal.
The registered eligibility criteria excluded planned or completed thrombectomy. LAIS therefore supplies evidence for the enrolled acute-stroke population, not for adding loberamisal to an endovascular pathway. For neurointervention, the next useful question is whether the effect survives testing in patients receiving reperfusion procedures.
ANGEL-TNK: evidence supports sustained benefit for excellent recovery
- Evidence
- RCT – secondary/follow-up
- Strength
- Moderate
- Practice impact
- Potentially practice changing
The prespecified one-year ANGEL-TNK analysis assessed 241 of 255 randomised patients after successful anterior-circulation thrombectomy at 4.5–24 hours, without preceding intravenous thrombolysis. Excellent recovery (mRS 0–1) occurred in 55/120 (45.8%) with intra-arterial tenecteplase and 34/121 (28.1%) with standard treatment: reported RR 1.55 (95% CI 1.05–2.29). Multiple-imputation analysis remained significant.
Functional independence, disability shift and mortality did not differ significantly. The one-year analysis supports a sustained benefit of intra-arterial tenecteplase at the excellent-recovery threshold. It extends observation of the original randomised cohort rather than independently replicating the result.
ATTENTION LATE: no demonstrated benefit from late basilar bridging
- Evidence
- RCT – primary results
- Strength
- Moderate
- Practice impact
- Context only
ATTENTION LATE randomised 332 patients at 40 Chinese centres; two withdrew consent. Participants had basilar occlusion, NIHSS ≥10 and direct presentation to thrombectomy-capable centres 4.5–24 hours after onset. Ninety-day mRS 0–2 occurred in 50/165 (30%) receiving intravenous tenecteplase plus thrombectomy and 50/164 (30%) receiving thrombectomy alone: adjusted RR 0.92 (95% CI 0.67–1.25).
Symptomatic intracranial haemorrhage occurred in 8/166 versus 6/164, and mortality in 66/166 versus 70/164. Superiority was not demonstrated; the confidence interval does not establish equivalence.
Unlike ANGEL-TNK, this is a test of intravenous treatment before thrombectomy in late basilar occlusion. It leaves early-window bridging and transfer pathways unanswered. Route, timing and vascular territory explain why the two trials should be read separately.
CREST-2: revascularisation did not improve tested cognition
- Evidence
- RCT – secondary/follow-up
- Strength
- Moderate
- Practice impact
- Context only
The CREST-2 cognitive analysis included 2,165 participants across the separate stenting and endarterectomy trials. Blinded telephone testing assessed five cognitive domains at baseline and annually. The adjusted four-year composite differences versus intensive medical management were 0.03 SD (95% CI −0.09 to 0.15) for stenting and 0.02 SD (−0.09 to 0.14) for endarterectomy; individual tests also showed no significant differences. Mean follow-up was 2.24 years.
The CREST-H substudy likewise did not demonstrate that baseline haemodynamic impairment modified cognitive benefit, although its smaller complete-data sample limits precision.
These results address measured cognition rather than the trials’ stroke-prevention outcomes. They do not compare stenting directly with endarterectomy. When cognitive symptoms enter a carotid consultation, the randomised evidence gives no basis for promising improvement from either procedure.
Tiny aneurysms: small size does not remove treatment risk
- Evidence
- Retrospective cohort
- Strength
- Low
- Practice impact
- Context only
Among 5,107 treated unruptured aneurysms in a multicentre registry, 783 measured ≤3 mm. Intraoperative complications occurred in 5.2% of tiny versus 5.1% of 3–5 mm aneurysms; postprocedural complications occurred in 8.4% versus 8.7%. These separate endpoints should not be added to produce a total rate.
Anterior communicating and posterior communicating artery locations were associated with intraoperative complications: OR 4.92 (95% CI 1.34–18.1) and 4.08 (1.40–11.9), respectively. Stent-assisted coiling was also associated with higher intraoperative risk relative to clipping (OR 3.98, 1.33–11.9), with anatomical and treatment-selection differences potentially contributing.
This is a registry of lesions selected for treatment. It helps describe procedural risk, but does not establish equivalence across sizes or a net advantage over surveillance. A technically treatable tiny aneurysm still needs an indication grounded in the individual lesion and patient.
SAH transfer: hydrocephalus can develop during the journey
- Evidence
- Retrospective cohort
- Strength
- Low
- Practice impact
- Context only
A single-centre retrospective study followed 563 patients with aneurysmal subarachnoid haemorrhage, including 419 transferred from 77 referring facilities. Among 307 patients with paired scans, hydrocephalus increased from 15.6% before transfer to 33.2% on arrival; 17.6% developed new hydrocephalus in transit. Glasgow Coma Scale deterioration was recorded in 10.3% of transferred patients.
Twelve-month independence was reported in 51.9% with newly developed hydrocephalus and 45.7% with persistent hydrocephalus, versus 69.4% without hydrocephalus. These observational associations do not identify a causal transfer intervention.
The practical contribution is a changing clinical picture: the examination and CT at referral may no longer describe the patient arriving at the receiving centre.
Paediatric venous rescue: long follow-up alongside procedural injury
- Evidence
- Retrospective cohort
- Strength
- Very low
- Practice impact
- Hypothesis generating
A single-centre series described 45 patients younger than 18 years receiving endovascular treatment for cerebral venous sinus thrombosis. Mean age was 14.8 years; 88.9% had multiple sinuses involved and 31.1% had parenchymal haemorrhage. Treatment combined varying proportions of catheter-directed thrombolysis and thrombectomy.
Two sinus perforations and one symptomatic intracranial haemorrhage were reported. All patients were described as having favourable functional outcomes at a median 68-month follow-up. The long observation period is valuable, but an anticoagulation-only comparator and a standardised rescue pathway were absent.
The report adds technical experience in a predominantly adolescent population. Keeping the procedural injuries beside the recovery figures makes it more useful for a multidisciplinary rescue discussion than treating the favourable outcomes as proof of comparative efficacy.
Contrast-gradient cone-beam CT separates fistula anatomy
- Evidence
- Case series
- Strength
- Very low
- Practice impact
- Hypothesis generating
A technical series used sequential diluted and undiluted contrast injections to produce a density gradient during cone-beam CT of dural arteriovenous fistulas. Injection timing was based on arterial and venous opacification on DSA. Across 55 sessions in 45 consecutive patients, all acquisitions ultimately succeeded; two required repeat acquisition after timing adjustment, and no imaging-related adverse events were reported.
The reconstructions aimed to distinguish arterial feeders, shunt points and venous drainage, including the functional sinus lumen. That is an attractive planning problem when overlapping structures obscure the target. The series establishes feasibility of the acquisition method, rather than blinded diagnostic accuracy or improved treatment outcomes.
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The carotid trials offer a particularly useful counselling result: improved cognition should not be promised as a benefit of revascularisation. The procedural series offer a different kind of value, making complications and changing clinical circumstances visible before an intervention is chosen.