Publications by authors named "Nederkoorn P"

Cerebrovascular events (CVEs) are serious late adverse events among childhood cancer survivors. We estimated the incidence and risk factors of symptomatic CVEs and described the clinical characteristics among childhood cancer survivors after upper body radiotherapy. The Dutch Childhood Cancer Survivor Study LATER cohort study includes 5-year childhood cancer survivors diagnosed View Article and Find Full Text PDF

Importance: Efficient care processes are crucial to minimize treatment delays and improve outcome after endovascular thrombectomy (EVT) in patients with ischemic stroke. A potential means to improve care processes is performance feedback.

Objective: To evaluate the effect of performance feedback to hospitals on treatment times for EVT.

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Background And Aims: Previous observational data indicate that young adults treated with intravenous thrombolysis (IVT) for acute ischemic stroke have more favorable outcomes and less complications when compared to older adults. Given the limited data on this topic, we aimed to provide more evidence on clinical outcomes and safety in such patients, using a large international thrombolysis registry.

Methods: In this prospective multicenter study, we used data from the Thrombolysis in Ischemic Stroke Patients (TRISP) registry from 1998 to 2020.

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Background: Acute intracranial occlusion of the internal carotid artery (ICA) can be distinguished into (a) occlusion of the terminal ICA, involving the proximal segments of the middle or anterior cerebral artery (ICA-L/-T) and (b) non-terminal intracranial occlusions of the ICA with patent circle of Willis (ICA-I). While patients with ICA-L/-T occlusion were included in all randomized controlled trials on endovascular therapy (EVT) in anterior large vessel occlusion, data on EVT in ICA-I occlusion is scarce. We thus aimed to evaluate effectiveness and safety of EVT in ICA-I occlusions in comparison to ICA-L/-T occlusions.

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Article Synopsis
  • Randomized trials in stroke often evaluate multiple outcomes, but a limitation is that all events are treated equally despite varying severity.
  • The win ratio is introduced as a new method, prioritizing clinically significant outcomes in a hierarchical order, which helps manage competing risks like death.
  • This approach has potential benefits, such as emphasizing key outcomes and combining various outcome types, and it will be applied in the upcoming ECST-2 trial, advocating for a broader use of the win ratio in future stroke research.
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Article Synopsis
  • The study evaluated the effectiveness and safety of endovascular thrombectomy (EVT) in acute ischemic stroke patients treated within early (<6 hours) and extended (6-24 hours) time windows after symptom onset.
  • It compared outcomes like good functional recovery, intracranial hemorrhage, and mortality rates between the two groups, finding that while early treatment showed slightly better recovery rates, both time frames had similar safety outcomes.
  • Overall, the findings suggest that EVT remains a viable option for patients up to 24 hours after stroke symptoms, aligning with real-world clinical practices.
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Article Synopsis
  • Doctors are trying to figure out who is at the highest risk of having another stroke after a TIA or minor stroke by looking at different factors, mainly how blocked someone's carotid arteries are.
  • A new tool called the IMPROVE model has been created to better predict stroke risk by using information from MRI scans and other factors like age and sex.
  • This model has been tested successfully and can help doctors decide who might need surgery to prevent future strokes.
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Article Synopsis
  • - The PARISK study found that carotid plaques with intraplaque hemorrhage (IPH) increase the risk of future ischemic cerebrovascular events, particularly in patients with transient ischemic attacks or strokes.
  • - Researchers analyzed 89 patients with IPH-positive carotid plaques over 5 years, including brain MRI results after 2 years to see if IPH signal intensity ratios (SIR) and volumes correlated with new cerebrovascular events.
  • - The study concluded that neither the IPH SIR nor the volume was significantly associated with the occurrence of future ischemic events or new brain infarcts, indicating other factors may be more influential in predicting these occurrences.
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Background: Anti-inflammatory therapy with long-term colchicine prevented vascular recurrence in coronary disease. Unlike coronary disease, which is typically caused by atherosclerosis, ischaemic stroke is caused by diverse mechanisms including atherosclerosis and small vessel disease or is frequently due to an unknown cause. We aimed to investigate the hypothesis that long-term colchicine would reduce recurrent events after ischaemic stroke.

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Article Synopsis
  • The study compares two strategies for managing high blood pressure in patients with ischaemic strokes who are eligible for intravenous thrombolysis: an active blood-pressure-lowering strategy and a conservative, non-lowering approach.
  • Conducted across 37 Dutch stroke centers, it involved eligible adults with elevated blood pressure and aimed to assess functional outcomes at 90 days, alongside secondary measures like complications and treatment timing.
  • The trial started in January 2015 but was prematurely halted due to low patient enrollment and lack of funding.
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Background: Patent foramen ovale (PFO) is a congenital anatomical variant which is associated with strokes in young adults. Contrary to vascular risk factors and atherosclerosis, a PFO is present from birth. However, it is completely unknown how an anatomical structure that is already present at birth in a large proportion of the population can convert into a PFO that causes stroke in a few.

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Introduction: To improve our understanding of the relatively poor outcome after endovascular treatment (EVT) in women we assessed possible sex differences in baseline neuroimaging characteristics of acute ischemic stroke patients with large anterior vessel occlusion (LVO).

Patients And Methods: We included all consecutive patients from the MR CLEAN Registry who underwent EVT between 2014 and 2017. On baseline non-contrast CT and CT angiography, we assessed clot location and clot burden score (CBS), vessel characteristics (presence of atherosclerosis, tortuosity, size, and collateral status), and tissue characteristics with the Alberta Stroke Program Early Computed Tomography Score (ASPECTS).

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Importance: Cause of ischemic stroke in young people is highly variable; however, the risk of recurrence is often presented with all subtypes of stroke grouped together in classification systems such as the Trial of ORG (danaparoid sodium [Orgaran]) 10172 in Acute Stroke Treatment (TOAST) criteria, which limits the ability to individually inform young patients with stroke about their risk of recurrence.

Objective: To determine the short-term and long-term risk of recurrent vascular events after ischemic stroke at a young age by stroke cause and to identify factors associated with recurrence.

Design, Setting, And Participants: This cohort study used data from the Observational Dutch Young Symptomatic Stroke Study, a prospective, multicenter, hospital-based cohort study, conducted at 17 hospitals in the Netherlands between 2013 and 2021.

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Fifteen to 20% of patients with an acute ischaemic stroke have a tandem lesion defined by the combination of an intracranial large vessel thrombo-embolic occlusion and a high grade stenosis or occlusion of the ipsilateral internal carotid artery. These patients tend to have worse outcomes than patients with isolated intracranial occlusions, with higher rates of disability and death. The introduction of endovascular thrombectomy to treat the intracranial lesion clearly improved the outcome compared with treatment with intravenous thrombolysis alone.

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Article Synopsis
  • Women with posterior circulation large vessel occlusion (LVO) showed similar clinical outcomes to men after endovascular treatment (EVT), despite having less favorable baseline characteristics.
  • The study analyzed data from 264 patients in the Netherlands, focusing on various outcomes such as functionality and death rates after treatment.
  • Overall, the results suggest that both men and women may receive equal benefits from EVT in treating posterior circulation LVO.
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Background: Limited data exists on cognitive recovery in young stroke patients. We aimed to investigate the longitudinal course of cognitive performance during the first year after stroke at young age and identify predictors for cognitive recovery.

Methods: We conducted a multicentre prospective cohort study between 2013 and 2021, enrolling patients aged 18-49 years with first-ever ischaemic stroke.

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Introduction: Carotid atherosclerotic intraplaque hemorrhage (IPH) predicts stroke. Patients with a history of stroke are treated with antiplatelet agents to prevent secondary cardiovascular events. A positive association between previous antiplatelet use and IPH was reported in a cross-sectional analysis.

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Article Synopsis
  • A recent update was made about how to manage patients with asymptomatic carotid stenosis (AsxCS), which means they have a narrow artery but don’t show symptoms.
  • Researchers looked at studies until August 2023 to learn about new treatments and techniques for these patients.
  • It's important to provide medical treatment to all patients, but some with specific risks may need surgery, and decisions should be based on individual needs and situations.
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Purpose: Carotid intraplaque hemorrhage (IPH) on MRI predicts stroke. Magnetization-prepared rapid acquisition gradient (MP-RAGE) is widely used to detect IPH. CE-MRA is used routinely to assess stenosis.

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Missing data are frequently encountered in registries that are used to compare performance across hospitals. The most appropriate method for handling missing data when analysing differences in outcomes between hospitals with a generalised linear mixed model is unclear. We aimed to compare methods for handling missing data when comparing hospitals on ordinal and dichotomous outcomes.

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Most current deep learning based approaches for image segmentation require annotations of large datasets, which limits their application in clinical practice. We observe a mismatch between the voxelwise ground-truth that is required to optimize an objective at a voxel level and the commonly used, less time-consuming clinical annotations seeking to characterize the most important information about the patient (diameters, counts, etc.).

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Introduction: High systolic blood pressure (SBP) is associated with poor functional outcome. We analysed whether the association of SBP with outcomes after endovascular treatment (EVT) is modified by prior intravenous thrombolysis (IVT).

Patients And Methods: This was a post-hoc analysis of MR CLEAN-NO IV, a randomised trial of IVT with alteplase followed by EVT versus EVT alone, within 4.

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Background: Retinal artery occlusion (RAO) may lead to irreversible blindness. For acute RAO, intravenous thrombolysis (IVT) can be considered as treatment. However, due to the rarity of RAO, data about IVT safety and effectiveness is limited.

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Background And Purpose: This study aimed to investigate the effect of endovascular treatment (EVT, with or without intravenous thrombolysis [IVT]) versus IVT alone on outcomes in patients with acute ischemic stroke (AIS) and intracranial large vessel occlusion (LVO) attributable to cervical artery dissection (CeAD).

Methods: This multinational cohort study was conducted based on prospectively collected data from the EVA-TRISP (EndoVAscular treatment and ThRombolysis for Ischemic Stroke Patients) collaboration. Consecutive patients (2015-2019) with AIS-LVO attributable to CeAD treated with EVT and/or IVT were included.

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