Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 37
Filtrar
1.
Neuroradiology ; 66(5): 737-747, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38462584

RESUMO

PURPOSE: To assess the performance of a 2.5-minute multi-contrast brain MRI sequence (NeuroMix) in diagnosing acute cerebral infarctions. METHODS: Adult patients with a clinical suspicion of acute ischemic stroke were retrospectively included. Brain MRI at 3 T included NeuroMix and routine clinical MRI (cMRI) sequences, with DWI/ADC, T2-FLAIR, T2-weighted, T2*, SWI-EPI, and T1-weighted contrasts. Three radiologists (R1-3) independently assessed NeuroMix and cMRI for the presence of acute infarcts (DWI ↑, ADC = or ↓) and infarct-associated abnormalities on other image contrasts. Sensitivity, specificity, and the area under the receiver operating characteristic curve (AUC) were calculated and compared using DeLong's test. Inter- and intra-rater agreements were studied with kappa statistics. Relative DWI (rDWI) and T2-FLAIR (rT2-FLAIR) signal intensity for infarctions were semi-automatically rendered, and the correlation between methods was evaluated. RESULTS: According to the reference standard, acute infarction was present in 34 out of 44 (77%) patients (63 ± 17 years, 31 men). Other infarct-associated signal abnormalities were reported in similar frequencies on NeuroMix and cMRI (p > .08). Sensitivity for infarction detection was 94%, 100%, and 94% evaluated by R1, R2, R3, for NeuroMix and 94%, 100%, and 100% for cMRI. Specificity was 100%, 90%, and 100% for NeuroMix and 100%, 100%, and 100% for cMRI. AUC for NeuroMix was .97, .95, and .97 and .97, 1, and 1 for cMRI (DeLong p = 1, .32, .15), respectively. Inter- and intra-rater agreement was κ = .88-1. The correlation between NeuroMix and cMRI was R = .73 for rDWI and R = .83 for rT2-FLAIR. CONCLUSION: Fast multi-contrast MRI NeuroMix has high diagnostic performance for detecting acute cerebral infarctions.


Assuntos
Isquemia Encefálica , AVC Isquêmico , Acidente Vascular Cerebral , Adulto , Masculino , Humanos , Estudos Retrospectivos , Imageamento por Ressonância Magnética/métodos , Isquemia Encefálica/diagnóstico por imagem , Imagem de Difusão por Ressonância Magnética/métodos , Doença Aguda , Encéfalo/diagnóstico por imagem , Infarto Cerebral , Infarto , Acidente Vascular Cerebral/diagnóstico por imagem
2.
Eur J Neurol ; 30(5): 1312-1319, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36746650

RESUMO

BACKGROUND AND PURPOSE: The best reperfusion treatment for patients with mild acute ischaemic stroke harbouring proximal anterior circulation large vessel occlusion (LVO) is unknown. The aim was to compare the safety and efficacy of intravenous thrombolysis (IVT) plus endovascular thrombectomy (EVT) versus IVT alone in LVO patients with mild symptoms. METHODS: From the Safe Implementation of Treatment in Stroke-International Stroke Thrombolysis and Thrombectomy Register (SITS-ISTR), were included: (i) consecutive acute ischaemic stroke patients, (ii) treated within 4.5 h from symptoms onset, (iii) baseline National Institutes of Health Stroke Scale (NIHSS) score ≤5 and (iv) intracranial internal carotid artery [ICA], M1 or T occlusion [defined as occlusion of ICA terminal bifurcation]. After propensity score matching, 3-month functional outcomes (modified Rankin Scale [mRS] 0-1 and 0-2) and safety outcomes (symptomatic intracerebral haemorrhage and death) were compared (via univariable and multivariable logistic [and ordinal] regression analyses) in patients treated with IVT + EVT versus IVT alone. RESULTS: In all, 1037 patients were included. After propensity score matching (n = 312 per group), IVT + EVT was independently associated with poor functional outcomes (adjusted odds ratio [aOR] 0.46 for mRS 0-1, 95% confidence interval [CI] 0.30-0.72, p = 0.001; aOR 0.52 for mRS 0-2, 95% CI 0.32-0.84, p = 0.007; aOR 1.61 for 1-point shift in mRS score, 95% CI 1.12-2.32, p = 0.011), with no significant differences in safety outcomes compared to IVT alone, despite numerically higher rates of symptomatic intracerebral haemorrhage (3.3% vs. 1.1%; p = 0.082), a higher rate of any haemorrhagic transformation (17.6% vs. 7.3%; p < 0.001) and subarachnoid haemorrhage (7.9% vs. 1.5%; p = 0.002) in the IVT + EVT group. DISCUSSION: In anterior circulation LVO patients presenting with NIHSS score ≤5, IVT + EVT (vs. IVT alone) was associated with poorer 3-month functional outcome. Randomized controlled trials are needed to elucidate the best treatments in mild LVO patients.


Assuntos
Isquemia Encefálica , Procedimentos Endovasculares , AVC Isquêmico , Acidente Vascular Cerebral , Humanos , Acidente Vascular Cerebral/tratamento farmacológico , Isquemia Encefálica/tratamento farmacológico , Terapia Trombolítica/efeitos adversos , Pontuação de Propensão , Resultado do Tratamento , Procedimentos Endovasculares/efeitos adversos , Trombectomia/efeitos adversos , AVC Isquêmico/etiologia , Hemorragia Cerebral/etiologia , Fibrinolíticos
3.
Stroke ; 53(2): 473-481, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-34583527

RESUMO

BACKGROUND AND PURPOSE: The Stockholm Stroke Triage System (SSTS) is a prehospital algorithm for detection of endovascular thrombectomy (EVT)-eligible patients, combining symptom severity assessment and ambulance-to-hospital teleconsultation, leading to a decision on primary stroke center bypass. In the Stockholm Region (6 primary stroke centers, 1 EVT center), SSTS implementation in October 2017 reduced onset-to-EVT time by 69 minutes. We compared clinical outcomes before and after implementation of SSTS in an observational study. METHODS: We prospectively recruited patients transported by Code Stroke ambulance within the Stockholm region under the SSTS, treated with EVT during October 2017 to October 2019, and compared to EVT patients from 2 previous years. OUTCOMES: shift in modified Rankin Scale (mRS) scores, mRS score 0 to 1, mRS score 0 to 2, and death (all 3 months), National Institutes of Health Stroke Scale (NIHSS) score change 24-hour post-EVT, recanalization (Thrombolysis in Cerebral Infarction 2b-3), and symptomatic intracranial hemorrhage. mRS outcomes were adjusted for age and baseline NIHSS. RESULTS: Patients with EVT in the SSTS group (n=244) were older and had higher baseline NIHSS versus historical controls (n=187): median age 74 (interquartile range, 63-81) versus 71 (61-78); NIHSS score 17 (11.5-21) versus 15 (10-20). During SSTS, median onset-to-puncture time was 136 versus 205 minutes (P<0.001). Adjusted common odds ratio for lower mRS in SSTS patients was 1.7 (95% CI, 1.2-2.3) versus controls. During SSTS, 83/240 (34.6%) versus 44/186 (23.7%) reached 3-month mRS score 0 to 1 (P=0.014), adjusted common odds ratio 2.3 (95% CI, 1.4-3.6). Median NIHSS change 24-hour post-EVT was 6 versus 4 (P=0.005). Differences in Thrombolysis in Cerebral Infarction, symptomatic intracranial hemorrhage, and death were nonsignificant. CONCLUSIONS: With an onset to arterial puncture time reduction by 69 minutes, outcomes in thrombectomy-treated patients improved significantly after region-wide large artery occlusion triage system implementation. These results warrant replication studies in other geographic and organizational circumstances.


Assuntos
Algoritmos , Procedimentos Endovasculares/métodos , Acidente Vascular Cerebral/terapia , Trombectomia/métodos , Triagem/métodos , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Serviços Médicos de Emergência , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Consulta Remota , Suécia , Terapia Trombolítica , Tempo para o Tratamento , Resultado do Tratamento
4.
Stroke ; 52(4): 1441-1445, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33641383

RESUMO

BACKGROUND AND PURPOSE: The Stockholm Stroke Triage System, implemented in 2017, identifies patients with high likelihood of large vessel occlusion (LVO) stroke. A previous report has shown Stockholm Stroke Triage System notably reduced time to endovascular thrombectomy (EVT). As the indication for EVT now includes patients up to 24 hours, we aimed to assess Stockholm Stroke Triage System triage accuracy for LVO stroke and EVT treatment for patients presenting late (within 6-24 hours or with an unknown onset), put in contrast to triage accuracy within 0 to 6 hours. METHODS: Between October 2017 and October 2018, we included 2905 patients with suspected stroke, transported by priority 1 ground ambulance to a Stockholm Region hospital. Patients assessed 6 to 24 hours from last known well or with unknown onset were defined as late-presenting; those within <6 hours as early-presenting. Triage positivity was defined as transport to comprehensive stroke center because of suspected stroke, hemiparesis and high likelihood of EVT-eligible LVO per teleconsultation. RESULTS: Overall triage accuracy was high in late-presenting patients (90.9% for LVO, 93.9% for EVT), with high specificity (95.7% for LVO, 94.5% for EVT), and low to moderate sensitivity (34.3% for LVO, 64.7% for EVT), with similar findings in the early-presenting group. CONCLUSIONS: Our results may support using the Stockholm Stroke Triage System for primary stroke center bypass in patients assessed by ambulance up to 24 hours from time of last known well.


Assuntos
Algoritmos , Acidente Vascular Cerebral/diagnóstico , Triagem/métodos , Idoso , Idoso de 80 Anos ou mais , Procedimentos Endovasculares , Feminino , Humanos , Masculino , Acidente Vascular Cerebral/cirurgia , Fatores de Tempo
5.
J Magn Reson Imaging ; 54(4): 1088-1095, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-33942426

RESUMO

BACKGROUND: Fast multi-contrast echo planar MRI (EPIMix) has comparable diagnostic performance to standard MRI for detecting brain pathology but its performance in detecting acute cerebral infarctions has not been determined. PURPOSE: To assess the diagnostic performance of EPIMix for the detection of acute cerebral infarctions. STUDY TYPE: Retrospective observational cohort. POPULATION: One hundred and seventy-two consecutive patients with a clinical suspicion of non-hyperacute ischemic stroke (January 2018 to December 2019). FIELD STRENGTH AND SEQUENCE: 1.5 T or 3 T. EPIMix ((echo-planar based: diffusion weighted (DWI), T2*-weighted, T2-weighted, T2- and T1-fluid attenuated inversion recovery (FLAIR) images) vs. standard MRI: echo-planar DWI, echo-planar T2*-weighted or susceptibility weighted, turbo spin-echo T2-weighted, T2- and T1-FLAIR turbo spin-echo sequences. ASSESSMENT: Three neuroradiologists rated EPIMix and standard MRI on two separate occasions. Incongruent assessments were resolved in consensus with the fourth reader. The ratings included the diagnostic category (acute infarct, normal, and other pathology). Congruent diagnoses together with consensus diagnoses served as the reference standard. STATISTICAL TESTS: The diagnostic performance of EPIMix and standard MRI against the reference standard was calculated by the area under the receiver operating characteristic curve (AUC) and compared by DeLong's test. Sensitivity and specificity were determined. Inter-rater agreements were evaluated by Fleiss's kappa. RESULTS: Of 172 patients (61 ± 16 years, 103 men), acute infarcts were present in 80/172 (47%), normal findings in 60/172 (35%), and other pathology in 32/172 (19%). Across readers, the AUCs were .94-.95 for EPIMix and .95-.99 for standard MRI, with overlapping 95% CI (P = .02-.18). Inter-rater agreement for EPIMix was 0.90 and for standard MRI was 0.93. The sensitivity for EPIMix and standard MRI was 88-91% and 91-98%, respectively, while the specificity was 98-100% and 98-99%, both with overlapping 95% CI. CONCLUSION: Multi-contrast echo planar MRI showed a high but marginally lower diagnostic performance compared to standard MRI for the detection and characterization of acute brain infarct. LEVEL OF EVIDENCE: 3 TECHNICAL EFFICACY: Stage 2.


Assuntos
AVC Isquêmico , Encéfalo/diagnóstico por imagem , Imagem Ecoplanar , Humanos , Imageamento por Ressonância Magnética , Masculino , Estudos Retrospectivos , Sensibilidade e Especificidade
6.
J Neuroradiol ; 48(2): 75-81, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33340643

RESUMO

BACKGROUND AND PURPOSE: Dual energy CT is increasingly available and used in the standard diagnostic setting of ischemic stroke patients. We aimed to evaluate how different dual energy CT virtual monoenergetic energy levels impact identification of early ischemic changes, compared to conventional polyenergetic CT images. MATERIALS AND METHODS: This retrospective single-center study included patients presenting with acute ischemic stroke caused by an occlusion of the intracranial internal carotid artery or proximal middle cerebral artery. Data was gathered on consecutive patients admitted to our institution who underwent initial diagnostic stroke imaging with dual layer dual energy CT and a subsequent follow-up CT one to three days after admission. Automated ASPECTS results from conventional polyenergetic and different virtual monoenergetic energy level reconstructions at admission were generated and compared to reference standard ASPECTS. Confidence intervals (CI) for sensitivity, specificity, negative and positive predictive value were calculated. RESULTS: A total of 24 patients were included. Virtual monoenergetic reconstructions of 70 keV had the highest region-based ASPECTS accuracy, 0.90 (sensitivity 0.82 (95% CI 0.72-0.93), specificity 0.92 (0.88-0.97), negative predictive value 0.94 (0.90-0.96)), whereas virtual monoenergetic reconstructions of 40 keV had the lowest, 0.77 (sensitivity 0.34 (0.26-0.42), specificity 0.90 (0.89-0.96), negative predictive value 0.80 (0.77-0.83)). CONCLUSIONS: Automated 70 keV ASPECTS had the highest diagnostic accuracy, sensitivity and negative predictive value overall. Our results indicate that virtual monoenergetic energy levels impact the identification of early ischemic changes on CT.


Assuntos
Isquemia Encefálica , Acidente Vascular Cerebral , Isquemia Encefálica/diagnóstico por imagem , Humanos , Valor Preditivo dos Testes , Estudos Retrospectivos , Razão Sinal-Ruído , Acidente Vascular Cerebral/diagnóstico por imagem , Tomografia Computadorizada por Raios X
7.
Stroke ; 51(3): 876-882, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-31914885

RESUMO

Background and Purpose- Posterior circulation stroke (PCS) accounts for 5% to 19% of patients with acute stroke receiving intravenous thrombolysis. We aimed to compare safety and outcomes following intravenous thrombolysis between patients with PCS and anterior circulation stroke (ACS) and incorporate the results in a meta-analysis. Methods- We included patients in the Safe Implementation of Treatments in Stroke Thrombolysis Registry 2013 to 2017 with computed tomography/magnetic resonance angiographic occlusion data. Outcomes were parenchymal hematoma, symptomatic intracerebral hemorrhage (SICH) per SITS-MOST (Safe Implementation of Thrombolysis in Stroke Monitoring Study), ECASS II (Second European Co-operative Stroke Study) and NINDS (Neurological Disorders and Stroke definition), 3-month modified Rankin Scale score, and death. Adjustment for SICH risk factors (age, sex, National Institutes of Health Stroke Scale, blood pressure, glucose, and atrial fibrillation) and center was done using inverse probability treatment weighting, after which an average treatment effect (ATE) was calculated. Meta-analysis of 13 studies comparing outcomes in PCS versus ACS after intravenous thrombolysis was conducted. Results- Of 5146 patients, 753 had PCS (14.6%). Patients with PCS had lower median National Institutes of Health Stroke Scale: 7 (interquartile range, 4-13) versus 13 (7-18), P<0.001 and fewer cerebrovascular risk factors. In patients with PCS versus ACS, parenchymal hematoma occurred in 3.2% versus 7.9%, ATE (95% CI): -4.7% (-6.3% to 3.0%); SICH SITS-MOST in 0.6% versus 1.9%, ATE: -1.4% (-2.2% to -0.7%); SICH NINDS in 3.1% versus 7.8%, ATE: -3.0% (-6.3% to 0.3%); SICH ECASS II in 1.8% versus 5.4%, ATE: -2.3% (-5.3% to 0.7%). In PCS versus ACS, 3-month outcomes (70% data availability) were death 18.5% versus 20.5%, ATE: 6.0% (0.7%-11.4%); modified Rankin Scale score 0-1, 45.2% versus 37.5%, ATE: 1.7% (-6.6% to 3.2%); modified Rankin Scale score 0-2, 61.3% versus 49.4%, ATE: 2.4% (3.1%-7.9%). Meta-analysis showed relative risk for SICH in PCS versus ACS being 0.49 (95% CI, 0.32-0.75). Conclusions- The risk of bleeding complications after intravenous thrombolysis in PCS was half that of ACS, with similar functional outcomes and higher risk of death, acknowledging limitations of the National Institutes of Health Stroke Scale for stroke severity or infarct size adjustment.


Assuntos
Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/terapia , Terapia Trombolítica/efeitos adversos , Idoso , Idoso de 80 Anos ou mais , Hemorragia Cerebral/etiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Acidente Vascular Cerebral/fisiopatologia
8.
Stroke ; 51(9): e254-e258, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32787707

RESUMO

Recent case-series of small size implied a pathophysiological association between coronavirus disease 2019 (COVID-19) and severe large-vessel acute ischemic stroke. Given that severe strokes are typically associated with poor prognosis and can be very efficiently treated with recanalization techniques, confirmation of this putative association is urgently warranted in a large representative patient cohort to alert stroke clinicians, and inform pre- and in-hospital acute stroke patient pathways. We pooled all consecutive patients hospitalized with laboratory-confirmed COVID-19 and acute ischemic stroke in 28 sites from 16 countries. To assess whether stroke severity and outcomes (assessed at discharge or at the latest assessment for those patients still hospitalized) in patients with acute ischemic stroke are different between patients with COVID-19 and non-COVID-19, we performed 1:1 propensity score matching analyses of our COVID-19 patients with non-COVID-19 patients registered in the Acute Stroke Registry and Analysis of Lausanne Registry between 2003 and 2019. Between January 27, 2020, and May 19, 2020, 174 patients (median age 71.2 years; 37.9% females) with COVID-19 and acute ischemic stroke were hospitalized (median of 12 patients per site). The median National Institutes of Health Stroke Scale was 10 (interquartile range [IQR], 4-18). In the 1:1 matched sample of 336 patients with COVID-19 and non-COVID-19, the median National Institutes of Health Stroke Scale was higher in patients with COVID-19 (10 [IQR, 4-18] versus 6 [IQR, 3-14]), P=0.03; (odds ratio, 1.69 [95% CI, 1.08-2.65] for higher National Institutes of Health Stroke Scale score). There were 48 (27.6%) deaths, of which 22 were attributed to COVID-19 and 26 to stroke. Among 96 survivors with available information about disability status, 49 (51%) had severe disability at discharge. In the propensity score-matched population (n=330), patients with COVID-19 had higher risk for severe disability (median mRS 4 [IQR, 2-6] versus 2 [IQR, 1-4], P<0.001) and death (odds ratio, 4.3 [95% CI, 2.22-8.30]) compared with patients without COVID-19. Our findings suggest that COVID-19 associated ischemic strokes are more severe with worse functional outcome and higher mortality than non-COVID-19 ischemic strokes.


Assuntos
Isquemia Encefálica/complicações , Infecções por Coronavirus/complicações , Pneumonia Viral/complicações , Acidente Vascular Cerebral/complicações , Idoso , Idoso de 80 Anos ou mais , Isquemia Encefálica/diagnóstico por imagem , Isquemia Encefálica/terapia , COVID-19 , Estudos de Coortes , Infecções por Coronavirus/diagnóstico por imagem , Infecções por Coronavirus/terapia , Avaliação da Deficiência , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pandemias , Pneumonia Viral/diagnóstico por imagem , Pneumonia Viral/terapia , Pontuação de Propensão , Recuperação de Função Fisiológica , Sistema de Registros , Acidente Vascular Cerebral/diagnóstico por imagem , Acidente Vascular Cerebral/terapia , Análise de Sobrevida , Tempo para o Tratamento , Tomografia Computadorizada por Raios X , Resultado do Tratamento
9.
Stroke ; 50(9): 2507­2512, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31670921

RESUMO

Background and Purpose: Standardized registries may provide valuable data to further improve stroke care. Our aim was to obtain updated information about characteristics of stroke patients and management of stroke across the Ibero-American countries, using a common in-hospital registry (Safe Implementation of Treatments in Stroke­Sociedad Iberoamericana de Enfermedades Cerebrovasculares) as a basis for further quality improvement. Methods: Data for this study were entered into the Safe Implementation of Treatments in Stroke registry from September 2009 to December 2013 by 58 centers in 14 countries. Data included demographics, risk factors, onset-to-door time, National Institutes of Health Stroke Scale score, stroke subtype, ischemic stroke etiology, treatments, 3-month mortality, and modified Rankin Scale score. Time to treatment was also recorded for patients treated with thrombolysis. Results: Five thousand four hundred one patients were registered; median age, 65 years; 46% women; 3915 (72.5%) ischemic strokes; 686 (13.7%) hemorrhagic strokes; 213 (4.3%) subarachnoid hemorrhages; 414 (8.3%) transient ischemic attacks; and 31 (0.6%) cerebral vein thrombosis. The most prevalent risk factors were hypertension (71.3%), dyslipidemia (35.2%), and diabetes mellitus (23.6%). Atrial fibrillation was present in 15.1%. Three hundred one ischemic strokes were treated with intravenous thrombolysis (IVT; 7.7%). Patients undergoing IVT were more severely affected (median baseline National Institutes of Health Stroke Scale score, 11 versus 6). The rate of symptomatic intracerebral hemorrhages after IVT was 5.7%. At 3 months, 60.3% of IVT-treated patients and 59.1% of untreated patients were independent (modified Rankin Scale score, 0­2). Mortality was 11.4% in treated and 12.8% in untreated patients. Conclusions: Safe Implementation of Treatments in Stroke­Sociedad Iberoamericana de Enfermedades Cerebrovasculares is the largest registry of a general stroke population and the first study to evaluate the level of IVT use in Ibero-America. It provides valuable information that may help to improve the quality of stroke care in the Ibero-American region.


Assuntos
Isquemia Encefálica/tratamento farmacológico , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica , Ativador de Plasminogênio Tecidual/uso terapêutico , Idoso , Hemorragia Cerebral/tratamento farmacológico , Hemorragia Cerebral/epidemiologia , Feminino , Fibrinolíticos/uso terapêutico , Humanos , Hemorragias Intracranianas/induzido quimicamente , Hemorragias Intracranianas/tratamento farmacológico , Ataque Isquêmico Transitório/tratamento farmacológico , Masculino , Pessoa de Meia-Idade , Sistema de Registros , Fatores de Risco , Terapia Trombolítica/efeitos adversos , Resultado do Tratamento
11.
Stroke ; 49(7): 1695-1700, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29844031

RESUMO

BACKGROUND AND PURPOSE: Diagnostic transcranial Doppler ultrasound (TCD) is commonly used in patients with acute stroke before or during treatment with intravenous thrombolysis (IVT). We aimed to assess how much TCD delays IVT initiation and whether TCD influences outcomes. METHODS: We analyzed data from the SITS-ISTR (Safe Implementation of Thrombolysis in Stroke-International Stroke Thrombolysis Register) collected from December 2002 to December 2011. Outcomes were door-to-needle time, symptomatic intracerebral hemorrhage, functional outcome per the modified Rankin Scale, and mortality at 3 months. RESULTS: In hospitals performing any TCD pre-IVT, 1701 of 11 265 patients (15%) had TCD before IVT initiation. Door-to-needle time was higher in patients with pre-IVT TCD (74 versus 60 minutes; P<0.001). At hospitals performing any TCD during IVT infusion, of 9044 patients with IVT, 747 were examined with TCD during IVT. No treatment delay was seen with TCD during IVT. After multivariate adjustment, TCD during IVT was independently associated with modestly increased excellent functional outcome (modified Rankin Scale, 0-1; adjusted odds ratio, 1.28; 95% confidence interval, 1.06-1.55; P=0.012) and lower mortality (adjusted odds ratio, 0.73; 95% confidence interval, 0.55-0.95; P=0.022). CONCLUSIONS: We recommend that TCD, if performed, should be done during IVT infusion, to avoid treatment delay. The association of hyperacute TCD with beneficial outcomes suggests potential impact on patient management, which warrants further study.


Assuntos
Isquemia Encefálica/diagnóstico por imagem , Fibrinolíticos/uso terapêutico , Acidente Vascular Cerebral/diagnóstico por imagem , Ativador de Plasminogênio Tecidual/uso terapêutico , Idoso , Isquemia Encefálica/tratamento farmacológico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica/métodos , Fatores de Tempo , Tempo para o Tratamento , Resultado do Tratamento , Ultrassonografia Doppler Transcraniana
12.
BMC Med Inform Decis Mak ; 17(1): 7, 2017 01 10.
Artigo em Inglês | MEDLINE | ID: mdl-28073358

RESUMO

BACKGROUND: Interoperability standards intend to standardise health information, clinical practice guidelines intend to standardise care procedures, and patient data registries are vital for monitoring quality of care and for clinical research. This study combines all three: it uses interoperability specifications to model guideline knowledge and applies the result to registry data. METHODS: We applied the openEHR Guideline Definition Language (GDL) to data from 18,400 European patients in the Safe Implementation of Treatments in Stroke (SITS) registry to retrospectively check their compliance with European recommendations for acute stroke treatment. RESULTS: Comparing compliance rates obtained with GDL to those obtained by conventional statistical data analysis yielded a complete match, suggesting that GDL technology is reliable for guideline compliance checking. CONCLUSIONS: The successful application of a standard guideline formalism to a large patient registry dataset is an important step toward widespread implementation of computer-interpretable guidelines in clinical practice and registry-based research. Application of the methodology gave important results on the evolution of stroke care in Europe, important both for quality of care monitoring and clinical research.


Assuntos
Registros Eletrônicos de Saúde/estatística & dados numéricos , Fidelidade a Diretrizes/estatística & dados numéricos , Guias de Prática Clínica como Assunto , Sistema de Registros/estatística & dados numéricos , Acidente Vascular Cerebral/terapia , Europa (Continente) , Humanos , Estudos Retrospectivos
13.
Stroke ; 46(12): 3423-36, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26470773

RESUMO

BACKGROUND AND PURPOSE: This study aimed to assess the evidence on the periprocedural (<30 days) risks of carotid intervention in relation to timing of procedure in patients with recently symptomatic carotid stenosis. METHODS: A systematic literature review of studies published in the past 8 years reporting periprocedural stroke/death after carotid endarterectomy (CEA) and carotid stenting (CAS) related to the time between qualifying neurological symptoms and intervention was performed. Pooled estimates of periprocedural risk for patients treated within 0 to 48 hours, 0 to 7 days, and 0 to 15 days were derived with proportional meta-analyses and reported separately for patients with stroke and transient ischemic attack as index events. RESULTS: Of 47 studies included, 35 were on CEA, 7 on CAS, and 5 included both procedures. The pooled risk of periprocedural stroke was 3.4% (95% confidence interval [CI], 2.6-4.3) after CEA and 4.8% (95% CI, 2.5-7.8) after CAS performed <15 days; stroke/death rates were 3.8% and 6.9% after CEA and CAS, respectively. Pooled periprocedural stroke risk was 3.3% (95% CI, 2.1-4.6) after CEA and 4.8% (95% CI, 2.5-7.8) after CAS when performed within 0 to 7 days. In hyperacute surgery (<48 hours), periprocedural stroke risk after CEA was 5.3% (95% CI, 2.8-8.4) but with relevant risk differences among patients treated after transient ischemic attack (2.7%; 95% CI, 0.5-6.9) or stroke (8.0%; 95% CI, 4.6-12.2) as index. CONCLUSIONS: CEA within 15 days from stroke/transient ischemic attack can be performed with periprocedural stroke risk <3.5%. CAS within the same period may carry a stroke risk of 4.8%. Similar periprocedural risks occur after CEA and CAS performed earlier, within 0 to 7 days. Carotid revascularization can be safely performed within the first week (0-7 days) after symptom onset.


Assuntos
Estenose das Carótidas/cirurgia , Intervenção Médica Precoce/métodos , Endarterectomia das Carótidas/métodos , Estenose das Carótidas/diagnóstico , Intervenção Médica Precoce/tendências , Endarterectomia das Carótidas/tendências , Humanos , Medição de Risco , Resultado do Tratamento
14.
Stroke ; 45(6): 1657-63, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24788971

RESUMO

BACKGROUND AND PURPOSE: Intracerebral hemorrhage after treatment with intravenous recombinant tissue-type plasminogen activator for ischemic stroke can occur in local relation to the infarct, as well as in brain areas remote from infarcted tissue. We aimed to describe risk factors, 3-month mortality, and functional outcome in patients with the poorly understood complication of remote intracerebral hemorrhage, as well as local intracerebral hemorrhage. METHODS: In this study, 43 494 patients treated with intravenous recombinant tissue-type plasminogen activator, with complete imaging data, were enrolled in the Safe Implementation of Treatments in Stroke-International Stroke Thrombolysis Register (SITS-ISTR) during 2002 to 2011. Baseline data were compared among 970 patients (2.2%) with remote parenchymal hemorrhage (PHr), 2325 (5.3%) with PH, 438 (1.0%) with both PH and PHr, and 39 761 (91.4%) without PH or PHr. Independent risk factors for all hemorrhage types were obtained by multivariate logistic regression. RESULTS: Previous stroke (P=0.023) and higher age (P<0.001) were independently associated with PHr, but not with PH. Atrial fibrillation, computed tomographic hyperdense cerebral artery sign, and elevated blood glucose were associated with PH, but not with PHr. Female sex had a stronger association with PHr than with PH. Functional independence at 3 months was more common in PHr than in PH (34% versus 24%; P<0.001), whereas 3-month mortality was lower (34% versus 39%; P<0.001). CONCLUSIONS: Differences between risk factor profiles indicate an influence of previous vascular pathology in PHr and acute large-vessel occlusion in PH. Additional research is needed on the effect of pre-existing cerebrovascular disease on complications of recanalization therapy in acute ischemic stroke.


Assuntos
Isquemia Encefálica , Hemorragia Cerebral , Fibrinolíticos/efeitos adversos , Acidente Vascular Cerebral , Terapia Trombolítica/efeitos adversos , Ativador de Plasminogênio Tecidual/efeitos adversos , Fatores Etários , Idoso , Isquemia Encefálica/induzido quimicamente , Isquemia Encefálica/diagnóstico por imagem , Isquemia Encefálica/mortalidade , Hemorragia Cerebral/induzido quimicamente , Hemorragia Cerebral/diagnóstico por imagem , Hemorragia Cerebral/mortalidade , Feminino , Fibrinolíticos/uso terapêutico , Humanos , Masculino , Pessoa de Meia-Idade , Radiografia , Proteínas Recombinantes/efeitos adversos , Proteínas Recombinantes/uso terapêutico , Estudos Retrospectivos , Fatores de Risco , Acidente Vascular Cerebral/diagnóstico por imagem , Acidente Vascular Cerebral/tratamento farmacológico , Ativador de Plasminogênio Tecidual/uso terapêutico
15.
Ann Neurol ; 74(2): 266-74, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-23744571

RESUMO

OBJECTIVE: Controversy surrounds the safety of intravenous (IV) tissue plasminogen activator (tPA) in ischemic stroke patients treated with warfarin. The European tPA license precludes its use in anticoagulated patients altogether. American guidelines accept IV tPA use with an international normalized ratio (INR) ≤ 1.7. The influence of warfarin on symptomatic intracerebral hemorrhage (SICH), arterial recanalization, and long-term functional outcome in stroke thrombolysis remains unclear. METHODS: We analyzed data from 45,074 patients treated with IV tPA enrolled in the Safe Implementation of Thrombolysis in Stroke (SITS) International Stroke Thrombolysis Register. A total of 768 patients had baseline warfarin treatment with INR ≤ 1.7. Outcome measures were SICH, arterial recanalization, mortality, and functional independence at 3 months. RESULTS: Patients on warfarin with INR ≤ 1.7 were older, had more comorbidities, and had more severe strokes compared to patients without warfarin. There were no significant differences between patients with and without warfarin in SICH rates (adjusted odds ratio [aOR] = 1.23, 95% confidence interval [CI] = 0.72-2.11 per SITS-MOST; aOR = 1.26, 95% CI = 0.82-1.70 per European Cooperative Acute Stroke Study II) after adjustment for age, stroke severity, and comorbidities. Neither did warfarin independently influence mortality (aOR = 1.05, 95% CI = 0.83-1.35) or functional independence at 3 months (aOR = 1.01, 95% CI = 0.81-1.24). Arterial recanalization by computed tomography/magnetic resonance angiography trended higher in warfarin patients (62% [37 of 59] vs 55% [776/1,475], p = 0.066). Recanalization approximated by disappearance at 22 to 36 hours of a baseline hyperdense middle cerebral artery sign was increased (63% [124 of 196] vs 55% [3,901 of 7,099], p = 0.022). INTERPRETATION: Warfarin treatment with INR ≤ 1.7 did not increase the risk for SICH or death, and had no impact on long-term functional outcome in patients treated with IV tPA for acute ischemic stroke.


Assuntos
Anticoagulantes/efeitos adversos , Isquemia Encefálica/tratamento farmacológico , Hemorragia Cerebral/diagnóstico por imagem , Fibrinolíticos/administração & dosagem , Avaliação de Resultados em Cuidados de Saúde , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica , Ativador de Plasminogênio Tecidual/administração & dosagem , Varfarina/efeitos adversos , Idoso , Idoso de 80 Anos ou mais , Isquemia Encefálica/complicações , Isquemia Encefálica/epidemiologia , Hemorragia Cerebral/epidemiologia , Hemorragia Cerebral/etiologia , Hemorragia Cerebral/mortalidade , Feminino , Humanos , Infusões Intravenosas , Masculino , Pessoa de Meia-Idade , Radiografia , Sistema de Registros , Fatores de Risco , Acidente Vascular Cerebral/complicações , Acidente Vascular Cerebral/epidemiologia , Resultado do Tratamento
16.
Clin Neuroradiol ; 2024 Jul 25.
Artigo em Inglês | MEDLINE | ID: mdl-39052054

RESUMO

PURPOSE: Cone-beam CT in the interventional suite could be an alternative to CT to shorten door-to-thrombectomy time. However, image quality in cone-beam CT is limited by artifacts and poor differentiation between gray and white matter. This study compared non-contrast brain dual-layer cone-beam CT in the interventional suite to reference standard CT in stroke patients. METHODS: A prospective single-center study enrolled consecutive participants with ischemic or hemorrhagic stroke. The hemorrhage detection accuracy, per-region ASPECTS accuracy and subjective image quality (Likert scales for gray-white matter differentiation, structure perception and artifacts) were assessed by three neuroradiologists blinded to clinical data on dual-layer cone-beam CT 75 keV monoenergetic images compared to CT. Objective image quality was assessed by region-of-interest metrics. Non-inferiority for hemorrhage detection and ASPECTS accuracy was determined by the exact binomial test with a one-sided lower performance boundary prospectively set to 80% (98.75% CI). RESULTS: 27 participants were included (74 years ± 9; 19 female) in the hyperacute or acute stroke phase. One reader missed a small bleeding, but all hemorrhages were detected in the majority analysis (100% accuracy, CI lower boundary 86%, p = 0.002). ASPECTS majority analysis showed 90% accuracy (CI lower boundary 85%, p < 0.001). Sensitivity was 66% (individual readers 67%, 69%, and 76%), specificity was 97% (97%, 96%, 89%). Subjective and objective image quality were inferior to CT. CONCLUSION: In a small single-center cohort, dual-layer cone-beam CT showed non-inferior hemorrhage detection and ASPECTS accuracy to CT. Despite inferior image quality, the technique may be useful for stroke evaluation in the interventional suite. TRIAL REGISTRATION NUMBER: NCT04571099 (clinicaltrials.gov). Prospectively registered 2020-09-04.

18.
Stroke ; 44(6): 1595-600, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23632975

RESUMO

BACKGROUND AND PURPOSE: The SEDAN score is a prediction rule for assessment of the risk of symptomatic intracerebral hemorrhage (SICH) per the European Cooperative Acute Stroke Study (ECASS) II definition in patients with acute ischemic stroke treated with intravenous thrombolysis. We assessed the performance of the score in predicting SICH per the ECASS II and Safe Implementation of Treatments in Stroke Monitoring Study (SITS-MOST) definitions in the SITS-International Stroke Thrombolysis Register (SITS-ISTR). METHODS: We calculated the SEDAN score in 34 251 patients with complete data, enrolled into the SITS-ISTR. The risk for SICH by both definitions was calculated per score category. Odds ratios for SICH per point increase of the score were obtained using logistic regression. The predictive performance was assessed using area under the curve of the receiver operating characteristic (AUC-ROC). RESULTS: The predictive capability for SICH per ECASS II was moderate at AUC-ROC=0.66. With rising scores, there was a moderate increase in risk for SICH per ECASS II (odds ratio, 1.65 per point; 95% confidence interval, 1.59-1.72; P<0.001), with SICH rates between 1.6% for 0 points and 16.9% for ≥ 5 points, average 5.1%. The predictive capability for SICH per SITS-MOST was weaker, AUC-ROC=0.60, with lower increase per score point (odds ratio, 1.36 per point; 95% confidence interval, 1.28-1.46; P<0.001), and SICH rates between 0.8% for 0 points and 5.4% for ≥ 5 points, average 1.8%. CONCLUSIONS: In this very large data set, the predictive and discriminatory performances of the SEDAN score were only moderate for SICH per ECASS II and low for SICH per SITS-Monitoring Study.


Assuntos
Hemorragia Cerebral/epidemiologia , Medição de Risco/métodos , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica , Idoso , Feminino , Fibrinolíticos/administração & dosagem , Fibrinolíticos/uso terapêutico , Humanos , Injeções Intravenosas , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Ativador de Plasminogênio Tecidual/administração & dosagem , Ativador de Plasminogênio Tecidual/uso terapêutico
19.
Ther Adv Neurol Disord ; 16: 17562864231168278, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37187462

RESUMO

Background: Little is known about how prehospital triage using large vessel occlusion (LVO) stroke prediction scales affects patients with intracerebral hemorrhage (ICH). Objectives: We aimed to investigate whether the Stockholm Stroke Triage System (SSTS) implemented in 2017 has affected timing and outcomes of acute ICH neurosurgery, and to assess system triage accuracy for ICH with a neurosurgical indication or LVO thrombectomy. Design: Observational cohort study. Methods: In the Stockholm Region, we compared surgical timing, functional outcome, and death at 3 months in patients transported by code-stroke ground ambulance who had ICH neurosurgery, 2 years before versus 2 years after SSTS implementation. We also calculated triage precision metrics for treatment with either ICH neurosurgery or thrombectomy. Results: A total of 36 patients undergoing ICH neurosurgery were included before SSTS implementation and 30 after. No significant difference was found in timing of neurosurgery [median 7.5 (4.9-20.7) versus 9.1 (6.1-12.5) h after onset], distribution of functional outcomes (median 4 versus 4), and death at 3 months [3/29 (9%) versus 5/35 (17%)] before versus after implementation, respectively. The SSTS routed a larger proportion of patients subsequently undergoing ICH neurosurgery directly to the comprehensive stroke center: 13/36 (36%) before versus 18/30 (60%) after implementation. Overall system triage accuracy for ICH neurosurgery or thrombectomy was high at 90%, with 92% specificity and 65% sensitivity. Conclusion: The SSTS, initially designed for prehospital LVO stroke triage, routed more patients with neurosurgical indication for ICH directly to the comprehensive stroke center. This did not significantly affect surgical timing or outcomes.

20.
J Clin Med ; 12(8)2023 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-37109108

RESUMO

In patients with acute ischemic stroke, hemorrhagic transformation (HT) of infarcted tissue frequently occurs after reperfusion treatment. We aimed to assess whether HT and its severity influences the start of secondary prevention therapy and increases the risk of stroke recurrence. In this retrospective dual-center study, we recruited ischemic stroke patients treated with thrombolysis, thrombectomy or both. Our primary outcome was the time between revascularization and the start of any secondary prevention therapy. The secondary outcome was ischemic stroke recurrence within three months. We compared patients with vs. without HT and no (n = 653), minor (n = 158) and major (n = 51) HT patients using propensity score matching. The delay in the start of antithrombotics or anticoagulants was median 24 h in no HT, 26 h in minor HT and 39 h in major HT. No and minor HT patients had similar rates of any stroke recurrence (3.4% (all ischemic) vs. 2.5% (1.6% ischemic plus 0.9% hemorrhagic)). Major HT patients had a higher stroke recurrence at 7.8% (3.9% ischemic, 3.9% hemorrhagic), but this difference did not reach significance. A total of 22% of major HT patients did not start any antithrombotic treatment during the three-month follow-up. In conclusion, the presence of HT influences the timing of secondary prevention in ischemic stroke patients undergoing reperfusion treatments. Minor HT did not delay the start of antithrombotics or anticoagulants compared to no HT, with no significant difference in safety outcomes. Major HT patients remain a clinical challenge with both a delayed or lacking start of treatment. In this group, we did not see a higher rate of ischemic recurrence; however, this may have been censored by elevated early mortality. While not reaching statistical significance, hemorrhagic recurrence was somewhat more common in this group, warranting further study using larger datasets.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA