Petra M. G. Erkens

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BACKGROUND Low molecular weight heparins (LMWHs) have been shown to be effective and safe in preventing venous thromboembolism (VTE). They may also be effective for the initial treatment of VTE. This is an update of a Cochrane review first published in 1999 and previously updated in 2004. OBJECTIVES To determine the effect of LMWH compared with(More)
INTRODUCTION Rivaroxaban is an oral, direct Factor Xa inhibitor, approved for the treatment of pulmonary embolism (PE) and deep vein thrombosis (DVT) and the secondary prevention of recurrent PE and DVT as a fixed-dose, monotherapy regimen that does not require initial heparinisation, routine coagulation monitoring or dose adjustment. Approval in this(More)
IMPORTANCE D-dimer measurement is an important step in the diagnostic strategy of clinically suspected acute pulmonary embolism (PE), but its clinical usefulness is limited in elderly patients. OBJECTIVE To prospectively validate whether an age-adjusted D-dimer cutoff, defined as age × 10 in patients 50 years or older, is associated with an increased(More)
BACKGROUND Several clinical decision rules (CDRs) are available to exclude acute pulmonary embolism (PE), but they have not been directly compared. OBJECTIVE To directly compare the performance of 4 CDRs (Wells rule, revised Geneva score, simplified Wells rule, and simplified revised Geneva score) in combination with d-dimer testing to exclude PE. (More)
INTRODUCTION Data regarding outpatient treatment of pulmonary embolism (PE) is scarce. This study evaluates the safety of outpatient management of acute PE. METHODS This is a retrospective cohort study of consecutive patients presenting at the Ottawa Hospital with acute PE diagnosed between 1 January 2007 and 31 December 2008. PE was defined as an(More)
BACKGROUND Clinical probability assessment is combined with d-dimer testing to exclude pulmonary embolism (PE). PURPOSE To compare the test characteristics of gestalt (a physician's unstructured estimate) and clinical decision rules for evaluating adults with suspected PE and assess the failure rate of gestalt and rules when used in combination with(More)
INTRODUCTION The percentage of time within the target INR range 2.0 to 3.0 (TTR) in patients treated with vitamin K antagonists varies considerably among efficacy-studies of novel anticoagulants. In order to properly asses the quality of anticoagulant control in upcoming cost-effectiveness studies and real life registries this systematic review reports a(More)
INTRODUCTION The pulmonary embolism severity index (PESI) and the recently derived simplified PESI prognostic model have been developed to estimate the risk of 30-day mortality in patients with acute PE. We sought to assess if the PESI and simplified PESI prognostic models can accurately identify adverse events and to determine the rates of events in(More)
OBJECTIVE To validate the use of the Wells clinical decision rule combined with a point of care D-dimer test to safely exclude pulmonary embolism in primary care. DESIGN Prospective cohort study. SETTING Primary care across three different regions of the Netherlands (Amsterdam, Maastricht, and Utrecht). PARTICIPANTS 598 adults with suspected pulmonary(More)
OBJECTIVES The objective was to assess adverse outcomes in relation to the simplified Pulmonary Embolism Severity Index (PESI) score in patients treated with rivaroxaban or standard therapy in the phase III EINSTEIN PE study and to evaluate the utility of the simplified PESI score to identify low-risk pulmonary embolism (PE) patients. METHODS A post hoc(More)