Publications by authors named "Nijkeuter M"

Background: Pulmonary embolism is an important cause of preventable mortality. Treatment strategies depend on risk stratification. High-risk patients, and some intermediate-high-risk patients, require urgent reperfusion therapy.

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  • After 3 months of anticoagulation treatment for venous thromboembolism (VTE), clinicians must decide on continuing or stopping the treatment, ideally guided by the VTE-PREDICT calculator that estimates risks of recurrence and bleeding.
  • A study involved clinicians evaluating fictional VTE cases; some made duration proposals without calculator input (Group A), while others used the calculator to inform their decisions (Group B).
  • Results showed no overall difference in proposed durations between the two groups, yet many in Group A adjusted their recommendations after seeing the calculator risks, noting its usefulness, particularly for patients at high bleeding risk.
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  • The POCHET biobank aims to investigate bleeding complications during catheter directed thrombolysis (CDT) for acute limb ischemia (ALI) and to identify potential new biomarkers for predicting these complications, as current reliance on fibrinogen lacks strong evidence.
  • This multicenter prospective project includes patients undergoing CDT, collecting blood samples before and during treatment while assessing bleeding outcomes through a defined protocol.
  • By combining patient data and blood samples, the biobank seeks to advance research on bleeding risks associated with CDT and evaluate various biomarkers, contributing to improved patient care and safety.
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Introduction: Cancer-related pulmonary embolism (PE) is associated with poor prognosis. Some decision rules identifying patients eligible for home treatment categorize cancer patients at high risk of complications, precluding home treatment. We sought to assess the effectiveness and the safety of outpatient management of patients with low-risk cancer-associated PE.

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Background: A decision to stop or continue anticoagulation after 3 months of anticoagulation for venous thromboembolism (VTE) should be made by weighing individual risks of recurrence and bleeding.

Objectives: To determine the optimal ratio of recurrence risk reduction to increase the risk of bleeding in terms of maximizing quality-adjusted life years (QALYs) gained.

Methods: Using a microsimulation model, outcomes within 5 years were simulated after assigning extended treatment if absolute recurrence risk reduction outweighed absolute increase in clinically relevant bleeding risk (International Society on Thrombosis and Haemostasis definition), weighted by a certain ratio.

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Background:  The diagnosis of recurrent ipsilateral deep vein thrombosis (DVT) with compression ultrasonography (CUS) may be hindered by residual intravascular obstruction after previous DVT. A reference CUS, an additional ultrasound performed at anticoagulant discontinuation, may improve the diagnostic work-up of suspected recurrent ipsilateral DVT by providing baseline images for future comparison.

Objectives:  To evaluate the cost-effectiveness of routinely performing reference CUS in DVT patients.

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Background: In upper extremity thrombosis research, the occurrence of upper extremity postthrombotic syndrome (UE-PTS) is commonly used as the main outcome parameter. However, there is currently no reporting standard or a validated method to assess UE-PTS presence and severity. In a recent Delphi study, consensus was reached on a preliminary UE-PTS score, combining 5 symptoms, 3 signs, and the inclusion of a functional disability score.

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Background: Patients with venous thromboembolism (VTE) are commonly classified by the presence or absence of provoking factors at the time of VTE to guide treatment decisions. This approach may not capture the heterogeneity of the disease and its prognosis.

Objectives: To evaluate clinically important novel phenotypic clusters among patients with VTE without cancer and to explore their association with anticoagulant treatment and clinical outcomes.

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  • This study looked at how to safely check if pregnant women might have a serious condition called pulmonary embolism (PE) using different tests and rules.
  • They found that using the Wells rule and certain blood tests (D-dimer) can help figure out if PE is likely, and these methods worked well without too many false alarms.
  • However, another test using ultrasound on veins (CUS) didn’t work well unless the patients had more obvious symptoms of another condition, so it's better to use the blood tests in these cases.
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Aims: Deciding to stop or continue anticoagulation for venous thromboembolism (VTE) after initial treatment is challenging, as individual risks of recurrence and bleeding are heterogeneous. The present study aimed to develop and externally validate models for predicting 5-year risks of recurrence and bleeding in patients with VTE without cancer who completed at least 3 months of initial treatment, which can be used to estimate individual absolute benefits and harms of extended anticoagulation.

Methods And Results: Competing risk-adjusted models were derived to predict recurrent VTE and clinically relevant bleeding (non-major and major) using 14 readily available patient characteristics.

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Introduction: Current treatment strategies for primary upper extremity deep venous thrombosis (pUEDVT) range from conservative treatment with anticoagulation therapy to invasive treatment with thoracic outlet decompression surgery (TOD), frequently combined with catheter directed thrombolysis, percutaneous transluminal angioplasty, or stenting. Due to a lack of large prospective series with uniform data collection or a randomized trial, the optimal treatment strategy is still under debate. We conducted a multicenter observational study to assess the efficacy and safety of both the conservative and invasive treatment strategies for patients with pUEDVT.

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Introduction: There is a lack of comprehensive and uniform data on primary upper extremity deep venous thrombosis (pUEDVT). pUEDVT includes venous thoracic outlet syndrome related upper extremity deep venous thrombosis (UEDVT) and idiopathic UEDVT. Research on these conditions has been hampered by their rarity, lack of uniform diagnostic criteria, and heterogeneity in therapeutic strategies.

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Objectives: Primary deep vein thrombosis of the upper extremity (UEDVT) is a rare condition but up to 60% of patients may develop post-thrombotic syndrome in the upper extremity (UE-PTS) with significant morbidity and decreased quality of life. However, there is no universally accepted method to diagnose and classify UE-PTS, hampering scientific research on UEDVT treatment. Through this international Delphi consensus study we aimed to determine what a clinical score for diagnosing UE-PTS should entail.

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Background: Adequate patient education is essential for patients to engage in shared decision-making when deciding to stop or continue anticoagulation after 3 months for venous thromboembolism (VTE). Our objectives were to evaluate the effect of an interactive, educational app on patients' level of satisfaction with information, perceived level of knowledge, decisional conflict and extent of shared decision-making when deciding on treatment duration of VTE.

Materials And Methods: This randomized controlled trial in 1 academic and 3 general Dutch hospitals included adult patients diagnosed with VTE without malignancy or prolonged anticoagulation for other indications.

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Background:  Bleeding risk is highly relevant for treatment decisions in cancer-associated thrombosis (CAT). Several risk scores exist, but have never been validated in patients with CAT and are not recommended for practice.

Objectives:  To compare methods of estimating clinically relevant (major and clinically relevant nonmajor) bleeding risk in patients with CAT: (1) existing risk scores for bleeding in venous thromboembolism, (2) pragmatic classification based on cancer type, and (3) new prediction model.

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The presence of transvenous leads for cardiac device therapy may increase the risk of venous thromboembolisms. The epidemiology of these complications has not yet been determined systematically. Therefore, this study aims to determine (I) the incidence of symptomatic upper extremity deep vein thrombosis (UEDVT) and (II) the prevalence of asymptomatic upper extremity vein occlusion in patients with transvenous leads, both after the initial 2 months following lead implantation.

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Background: After 3 months of anticoagulation for unprovoked venous thromboembolism (VTE), a decision must be made to stop or continue indefinitely by weighing risks of recurrence and bleeding through shared decision-making (SDM). Despite the importance of patient involvement, patients' perspectives on treatment duration are understudied.

Aim: To describe the knowledge of VTE and anticoagulation, need for education, perception of risks and benefits of extended treatment, and factors influencing patient's preference to stop or continue treatment after unprovoked VTE.

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Background: Venous thromboembolism constitutes substantial health care costs amounting to approximately 60 million euros per year in the Netherlands. Compared with initial hospitalization, home treatment of pulmonary embolism (PE) is associated with a cost reduction. An accurate estimation of cost savings per patient treated at home is currently lacking.

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The diagnostic workup of recurrent ipsilateral deep vein thrombosis (DVT) using compression ultrasonography (CUS) can be complicated by persistent intravascular abnormalities after a previous DVT. We showed that magnetic resonance direct thrombus imaging (MRDTI) can exclude recurrent ipsilateral DVT. However, it is unknown whether the application of MRDTI in daily clinical practice is cost effective.

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Introduction: Prediction models for recurrence and bleeding are infrequently used when deciding on anticoagulant treatment duration after venous thromboembolism (VTE) due to concerns about performance and validity. Our aim was to critically appraise these models by systematically summarizing data from derivation and validation studies.

Materials And Methods: MEDLINE and CENTRAL were searched until November 15th, 2019.

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Article Synopsis
  • The study aimed to assess the effectiveness of using the Wells score and D-dimer test to rule out acute recurrent deep vein thrombosis (DVT) in patients suspected of having it.
  • In a group of 231 patients, those with an unlikely Wells score and a normal D-dimer showed only a 6.1% chance of having recurrent DVT, indicating high sensitivity but low specificity for this method.
  • While the approach could potentially reduce the need for radiological imaging in 21% of patients, the significant failure rate (6.1%) suggests that this strategy isn't advisable in everyday clinical practice.
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Background: Studies have shown the safety of home treatment of patients with pulmonary embolism (PE) at low risk of adverse events. Management studies focusing on home treatment have suggested that 30% to 55% of acute PE patients could be treated at home, based on the HESTIA criteria, but data from day-to-day clinical practice are largely unavailable.

Aim: To determine current practice patterns of home treatment of acute PE in the Netherlands.

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Study Objective: Syncope is a presenting symptom in 10% to 20% of patients with pulmonary embolism. We perform a meta-analysis to clarify the prognostic value of syncope on short-term mortality in pulmonary embolism patients and its association with hemodynamic instability.

Methods: PubMed, EMBASE, and the Cochrane Library were searched up until January 7, 2020.

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  • Diagnosing recurrent ipsilateral deep vein thrombosis (DVT) is difficult because past DVT can cause lasting changes that complicate ultrasound diagnosis.
  • Magnetic resonance direct thrombus imaging (MRDTI) is a promising, quick, and contrast-free method that can differentiate between new DVT and old thrombus.
  • In a study involving 305 patients, MRDTI showed a low rate of new venous thromboembolism (1.1%) after negative results, indicating it is a reliable diagnostic tool.
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