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2016 ; 353
(ä): i1754
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Endovascular treatment versus medical care alone for ischaemic stroke: systematic
review and meta-analysis
#MMPMID27091337
Rodrigues FB
; Neves JB
; Caldeira D
; Ferro JM
; Ferreira JJ
; Costa J
BMJ
2016[Apr]; 353
(ä): i1754
PMID27091337
show ga
OBJECTIVES: To evaluate the efficacy and safety of endovascular treatment,
particularly adjunctive intra-arterial mechanical thrombectomy, in patients with
ischaemic stroke. DESIGN: Systematic review and meta-analysis. DATA SOURCES:
Medline, Embase, Cochrane Central Register of Controlled Trials, Web of Science,
SciELO, LILACS, and clinical trial registries from inception to December 2015.
Reference lists were crosschecked. ELIGIBILITY CRITERIA FOR SELECTING STUDIES:
Randomised controlled trials in adults aged 18 or more with ischaemic stroke
comparing endovascular treatment, including thrombectomy, with medical care
alone, including intravenous recombinant tissue plasminogen activator (rt-PA).
Trial endpoints were functional outcome (modified Rankin scale scores of ?2) and
mortality at 90 days after onset of symptoms. No language or time restrictions
applied. RESULTS: 10 randomised controlled trials (n=2925) were included. In
pooled analysis endovascular treatment, including thrombectomy, was associated
with a higher proportion of patients experiencing good (modified Rankin scale
scores ?2) and excellent (scores ?1) outcomes 90 days after stroke, without
differences in mortality or rates for symptomatic intracranial haemorrhage,
compared with patients randomised to medical care alone, including intravenous
rt-PA. Heterogeneity was high among studies. The more recent studies (seven
randomised controlled trials, published or presented in 2015) proved better
suited to evaluate the effect of adjunctive intra-arterial mechanical
thrombectomy on its index disease owing to more accurate patient selection,
intravenous rt-PA being administered at a higher rate and earlier, and the use of
more efficient thrombectomy devices. In most of these studies, more than 86% of
the patients were treated with stent retrievers, and rates of recanalisation were
higher (>58%) than previously reported. Subgroup analysis of these seven studies
yielded a risk ratio of 1.56 (95% confidence interval 1.38 to 1.75) for good
functional outcomes and 0.86 (0.69 to 1.06) for mortality, without heterogeneity
among the results of the studies. All trials were open label. Risk of bias was
moderate across studies. The full results of two trials are yet to be published.
CONCLUSIONS: Moderate to high quality evidence suggests that compared with
medical care alone in a selected group of patients endovascular thrombectomy as
add-on to intravenous thrombolysis performed within six to eight hours after
large vessel ischaemic stroke in the anterior circulation provides beneficial
functional outcomes, without increased detrimental effects. SYSTEMATIC REVIEW
REGISTRATION: PROSPERO CRD42015019340.
|Administration, Intravenous
[MESH]
|Brain Ischemia/complications/*therapy
[MESH]
|Embolectomy/*methods
[MESH]
|Endovascular Procedures/methods
[MESH]
|Fibrinolytic Agents/*therapeutic use
[MESH]
|Humans
[MESH]
|Intracranial Hemorrhages/epidemiology
[MESH]
|Mechanical Thrombolysis/*methods
[MESH]
|Stents
[MESH]
|Stroke/etiology/*therapy
[MESH]
|Thrombectomy/*methods
[MESH]
|Thrombolytic Therapy/*methods
[MESH]
|Tissue Plasminogen Activator/*therapeutic use
[MESH]