Publications by authors named "Heleen M den Hertog"

Background: The multicenter ATTEST study recently assessed 1084 patients with ischemic stroke or transient ischemic attack (TIA) of undetermined cause and found that routine transthoracic echocardiography (TTE) detects abnormalities with treatment implications (i.e., major cardiac sources of embolism) in only 1 % of patients, of whom most (91 %) also had major electrocardiographic (ECG)-abnormalities.

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Article Synopsis
  • This study focuses on chronic subdural hematoma (CSDH) treatment, specifically how a portion of patients can resolve their condition without surgery, despite standard treatment typically involving an operation.
  • Data were gathered from patients treated conservatively at three hospitals in the Netherlands, with a primary goal of identifying factors that allow patients to avoid further treatment within three months of diagnosis.
  • Results show that 73% of patients did not need additional treatment, often having smaller hematoma volumes, indicating that further research is necessary to determine which patients truly need surgery versus those who can be treated conservatively.
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Background And Purpose: In patients with acute ischemic stroke, hyponatremia (plasma sodium < 136 mmol/L) is common and associated with unfavorable outcomes. However, data are limited for patients who underwent intravenous thrombolysis (IVT) and/or endovascular thrombectomy (EVT). Therefore, our aim was to assess the impact of hyponatremia on postreperfusion outcomes.

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Article Synopsis
  • A study in six Dutch hospitals examined the effectiveness of routine transthoracic echocardiography (TTE) in patients who experienced ischaemic stroke or transient ischaemic attack of unknown origin.
  • Out of 1084 enrolled patients, TTE detected major cardiac sources of embolism (CSE) in only 1% of cases, with most of those also showing significant ECG abnormalities.
  • The findings suggest that routine TTE may not be necessary for this patient group, as most CSEs detected were linked to pre-existing ECG issues.
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  • The study investigates the effectiveness of 7-day outpatient cardiac rhythm monitoring for detecting atrial fibrillation (AF) in patients who have had an ischemic stroke of unknown cause.
  • Out of 373 patients monitored, 4.6% were found to have new AF, with most cases detected within the first three days, but some were identified up to day 7.
  • The research suggests that the current guideline of a minimum 3-day monitoring may not be adequate, highlighting the need for longer monitoring in certain patients due to their cardiovascular risk factors.
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Background: The role of glucocorticoids without surgical evacuation in the treatment of chronic subdural hematoma is unclear.

Methods: In this multicenter, open-label, controlled, noninferiority trial, we randomly assigned symptomatic patients with chronic subdural hematoma in a 1:1 ratio to a 19-day tapering course of dexamethasone or to burr-hole drainage. The primary end point was the functional outcome at 3 months after randomization, as assessed by the score on the modified Rankin scale (range, 0 [no symptoms] to 6 [death]).

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Importance: Dual thrombolytic treatment with small bolus alteplase and mutant prourokinase has the potential to be a safer and more efficacious treatment for ischemic stroke than alteplase alone because mutant prourokinase is designed to act only on degraded fibrin without affecting circulating fibrinogen.

Objective: To assess the safety and efficacy of this dual thrombolytic treatment compared with alteplase.

Design, Setting, And Participants: This controlled, open-label randomized clinical trial with a blinded end point was conducted from August 10, 2019, to March 26, 2022, with a total follow-up of 30 days.

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Background: Endovascular treatment for anterior circulation ischaemic stroke is effective and safe within a 6 h window. MR CLEAN-LATE aimed to assess efficacy and safety of endovascular treatment for patients treated in the late window (6-24 h from symptom onset or last seen well) selected on the basis of the presence of collateral flow on CT angiography (CTA).

Methods: MR CLEAN-LATE was a multicentre, open-label, blinded-endpoint, randomised, controlled, phase 3 trial done in 18 stroke intervention centres in the Netherlands.

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Objective: Chronic subdural hematoma (CSDH) is a common neurological condition, often affecting the elderly. Cognitive impairment is frequently observed at presentation. However, the course and longer term aspects of the cognitive status of CSDH patients are unknown.

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Purpose: Chronic subdural hematoma (CSDH) is a common neurological disease often affecting the elderly. Long-term excess mortality for patients after CSDH has been suggested but causes of death are unknown. We hypothesize that excess mortality of CSDH patients is related to frailty.

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Objectives: We aimed to evaluate whether the overall harmful effect of periprocedural treatment with aspirin or heparin during endovascular stroke treatment is different in patients with a successful reperfusion after the procedure.

Materials And Methods: We performed a post-hoc analysis of the MR CLEAN-MED trial, including adult patients with a large vessel occlusion in the anterior circulation eligible for endovascular treatment (EVT). In this trial, patients were randomized for periprocedural intravenous treatment with aspirin or no aspirin (1:1 ratio), and for moderate-dose unfractionated heparin, low-dose unfractionated heparin or no unfractionated heparin (1:1:1 ratio).

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The main treatment strategy for chronic subdural hematoma is surgical intervention. When a conservative pharmacological approach is considered in symptomatic patients, mainly dexamethasone therapy is applied. Recent trials revealed dexamethasone therapy to be an ineffective treatment in symptomatic patients with chronic subdural hematoma.

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Article Synopsis
  • This study is looking at a new treatment for stroke that uses a combination of medicine called alteplase and a special version of another medicine called pro-urokinase (m-proUK) to see if it works better and is safer than just using alteplase alone.
  • The research involves many hospitals and will include 200 patients who have had a type of stroke called ischemic. Half will get the new treatment and half will get the regular treatment.
  • They will check for any bleeding in the brain and how well the patients recover after the treatment to see which option is better overall.
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Background: Several prognostic models for outcomes after chronic subdural hematoma (CSDH) treatment have been published in recent years. However, these models are not sufficiently validated for use in daily clinical practice. We aimed to assess the performance of existing prediction models for outcomes in patients diagnosed with CSDH.

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Patients with chronic subdural hematoma (CSDH) can have transient neurological deficits deficit (TND) mimicking transient ischemic attacks. The prevalence of TNDs in CSDH varies between 1%-24%, depending on TND definition. Despite this high prevalence the pathophysiology of TND in CSDH is not clear in many cases.

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Background: We aimed to quantify the need for additional surgery in patients with chronic subdural hematoma (CSDH) primarily treated with dexamethasone and to identify patient characteristics associated with additional surgery.

Methods: Data were retrospectively collected from 283 patients with CSDH, primarily treated with dexamethasone, in 3 hospitals from 2008 to 2018. Primary outcome was the need for additional surgery.

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Background: Aspirin and unfractionated heparin are often used during endovascular stroke treatment to improve reperfusion and outcomes. However, the effects and risks of anti-thrombotics for this indication are unknown. We therefore aimed to assess the safety and efficacy of intravenous aspirin, unfractionated heparin, both, or neither started during endovascular treatment in patients with ischaemic stroke.

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Background: We evaluated data from all patients in the Netherlands who underwent endovascular treatment for acute ischemic stroke in the past 3.5 years, to identify nationwide trends in time to treatment and procedural success, and assess their effect on clinical outcomes.

Methods: We included patients with proximal occlusions of the anterior circulation from the second and first cohorts of the MR CLEAN (Multicenter Randomized Clinical trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands) Registry (March 2014 to June 2016; June 2016 to November 2017, respectively).

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Background: Chronic subdural hematoma (CSDH) is a frequent pathological entity in daily clinical practice. However, evidence-based CSDH-guidelines are lacking and level I evidence from randomized clinical trials (RCTs) is limited. In order to establish and subsequently implement a guideline, insight into current clinical practice and attitudes toward CSDH-treatment is required.

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Introduction: We investigated the impact of the Corona Virus Disease 2019 (COVID-19) pandemic and the resulting lockdown on reperfusion treatments and door-to-treatment times during the first surge in Dutch comprehensive stroke centers. Furthermore, we studied the association between COVID-19-status and treatment times.

Methods: We included all patients receiving reperfusion treatment in 17 Dutch stroke centers from May 11th, 2017, until May 11th, 2020.

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Rationale: Symptoms of chronic subdural hematoma (CSDH) vary widely, including transient neurological deficit(s) (TND). The precise prevalence and the clinical aspects of TND are yet to be determined. Most TNDs are regarded and treated as symptomatic seizures, but the rationale for this decision is not always clear.

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Objective: To assess the prevalence of impaired visual emotion recognition in patients who have experienced a minor ischemic stroke in the subacute phase and to determine associated factors of impaired visual emotion recognition.

Design: A prospective observational study.

Setting: Stroke unit of a teaching hospital.

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Background: The value of administering intravenous alteplase before endovascular treatment (EVT) for acute ischemic stroke has not been studied extensively, particularly in non-Asian populations.

Methods: We performed an open-label, multicenter, randomized trial in Europe involving patients with stroke who presented directly to a hospital that was capable of providing EVT and who were eligible for intravenous alteplase and EVT. Patients were randomly assigned in a 1:1 ratio to receive EVT alone or intravenous alteplase followed by EVT (the standard of care).

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Background And Purpose: The frequency of ischemic stroke in patients with coronavirus disease 2019 (COVID-19) varies in the current literature, and risk factors are unknown. We assessed the incidence, risk factors, and outcomes of acute ischemic stroke in hospitalized patients with COVID-19.

Methods: We included patients with a laboratory-confirmed SARS-CoV-2 (severe acute respiratory syndrome coronavirus-2) infection admitted in 16 Dutch hospitals participating in the international CAPACITY-COVID registry between March 1 and August 1, 2020.

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Background: Patients with chronic subdural hematoma (CSDH) can present with a variety of signs and symptoms. The relationship of these signs and symptoms with functional outcome is unknown. Knowledge of these associations might aid clinicians in the choice to initiate treatment and may allow them to better inform patients on expected outcomes.

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