Active clinical trials for "Pulmonary Embolism"

The current data on the incidence of pulmonary hypertension (PH) are very variable, depending on the different studies designs. There are no data on the prognostic of PH in patients with asymptomatic pulmonary thromboembolisms (PT), neither paucisymptomatic PH, in which without a prospective follow-up would be underdiagnosed. We thought that the prognosis of both clinical forms (PT with or without symptoms) would be similar. The objective of this study is know the real incidence of pulmonary hypertension (PH) post symptomatic and asymptomatic pulmonary thromboembolic (PT).

Venous thromboembolism (VTE) remains a major cause of maternal morbidity and mortality in developed countries. Objective diagnosis of pulmonary embolism (PE) and/or deep vein thrombosis (DVT) in pregnancy is crucial. Failure to identify PE or/or DVT will place the mother's life at risk, and unnecessary treatment will not only expose her to anticoagulants but will also label her as having had VTE. Thus, this diagnosis has serious implications for the management of her present pregnancy, and for other aspects of her life ranging from contraception to thromboprophylaxis in future pregnancies and hormone replacement therapy in later life. It is therefore critical that all women with symptoms or signs that suggest venous thromboembolism have appropriate investigation and diagnosis based on objective diagnostic tests. The current diagnostic approach in suspected PE is based on sequential diagnostic tests: 1) assessment of clinical probability, 2) fibrin D-dimer measurement, 3) compression ultrasonography of lower limb veins and 4) multi-slice computed tomography (MSCT). However, physicians are reluctant to perform MSCT in pregnant women because of potential adverse effect of radiation exposure to the fetus. For this reason, ventilation/perfusion or perfusion-only lung scan has been the cornerstone of PE diagnosis in pregnant women. Indeed, perfusion lung scan was assumed to be associated with less radiation than computed tomography (CT). However, this technique is now widely abandoned in the usual diagnostic strategy of PE for the following reasons: it is not widely available; its interpretation may be difficult and the test may be inconclusive in the presence of other chest abnormalities. Moreover, recent data convincingly show that the radiation exposure associated with single-slice or multi-slice CT exposes the fetus to less radiation than perfusion lung scan. However, the use of CT has never been adequately validated in pregnant women with clinically suspected PE. The investigators, therefore, plan to set up a prospective management study in which pregnant women with suspected PE will undergo a sequential diagnostic strategy based on 1) assessment of clinical probability 2) D-dimer measurement 3) compression ultrasonography, and 4) MSCT. Nowadays, the overestimated fear of radiation exposure for the fetus leads to an irrational attitude and inadequate investigations in pregnant women with suspected PE, even though both European [3, 4] and North-American guidelines [5] suggest that only objective testing may accurately rule out the disease. The proposed study should lead to an increased awareness of the risks and benefits of appropriate imaging in pregnant women suspected of PE and should result in a more rational management of this under-studied patient group.

Evaluation of physician responses to BICS-Clinical Information 3-screen alerts that informs the clinician that his/her patient may be eligible for thromboprophylaxis.

This study evaluates the impact of community pharmacists' educational training on the nature and adequacy of counseling provided to patients on warfarin, an oral anticoagulant. Half of the community pharmacists participating in the study will receive a two-week educational training on how to adequately counsel patients on warfarin while the other half of community pharmacists will receive the same training after the study. A mystery patient model will be used in this intervention study where six different trained and standardized individuals will act as patients. Each of these mystery patients will supposedly have pulmonary embolism, deep vein thrombosis, or atrial fibrillation. The mystery patient will visit each pharmacy to buy warfarin or complain about adverse drug reaction been experienced. It is expected that pharmacists will provide relevant information and counseling to these patients on the use of the medication warfarin and how to handle the adverse drug reactions.

This is a prospective, observational, multicenter cohort study to compare right ventricular dysfunction dependent and independent prognostic models for short-term serous adverse events in patients who are diagnosed with pulmonary embolism in the emergency department. Clinical endpoints are assessed at days 1-5. A thirty-day follow-up phone call is conducted to obtain further clinical endpoints and a quality of life assessment.

Investigators are building an empirical evidence base for real world data through large-scale replication of randomized controlled trials. The investigators' goal is to understand for what types of clinical questions real world data analyses can be conducted with confidence and how to implement such studies.

Multicentric case-control study that is aims at: evaluating the prevalence of pulmonary embolism among a large population of consecutive patients admitted for COVID-19 pneumonia into two large university hospitals in Paris, France: Groupe Hospitalier Paris Saint-Joseph (GHPSJ) and Hôpital Européen Georges Pompidou (HEGP) and identifying the characteristics associated with pulmonary embolism by using a nested case control study design within the patients who underwent either unenhanced computed tomograpghy (CT) or CT pulmonary angiogram (CTPA) evaluation.

In this study a retrospective analysis of patients database was performed, who underwent treatment for deep vein thrombosis in tertiary hospital by using inferior vena cava-filters

Pulmonary embolism (PE) remains a diagnostic challenge. False negative testing exposes patient to the risk of potentially fatal recurrence. False positive testing exposes patients to potentially fatal unduly side effects of anticoagulants. Current diagnostic strategies rely on the sequential use of pretest clinical probability, Ddimer test, and chest imaging. Two chest imaging modalities have been validated for PE diagnostic exclusion: Computed Tomography Pulmonary Angiography (CTPA) and planar V/Q scan. Main limitations of planar V/Q are the high proportion of non-conclusive results, therefore requiring additional testing and more complex diagnostic algorithms. Main limitations of CTPA are its higher radiation dose and contraindications (renal failure). In a randomized trial that compared strategies based on CTPA and on planar V/Q scan, a 30% increase in the rate of PE diagnoses was found in the arm using CTPA, raising the hypothesis of over-diagnosing and over-treating PE when using CTPA. V/Q Single Photon Emission CT (SPECT) is a new method of scintigraphic acquisition that has been reported to improve the diagnostic performances of the test, which could reduce the number of non-conclusive tests and allow simplified diagnostic algorithms. The investigators hypothesize that a strategy based on V/Q SPECT could be an alternative to the two usual approaches responding rightly to the two mains issues and combining the advantages of CTPA (simplified diagnostic approach) and planar V/Q (no overdiagnosis, lower radiation exposure, no contraindication). Although a recent survey showed that up to 70% of nuclear medicine centers perform SPECT rather than planar imaging for diagnosing PE, a diagnostic management outcome study, in which diagnostic decision would be made on the basis of a standardized algorithm based on the V/Q SPECT is lacking. Such a study needs to be conducted to ensure that the safety of diagnostic exclusion using a V/Q SPECT based strategy is non-inferior to that of previously validated strategies, and to verify that the use of V/Q SPECT does not lead to over-diagnosis.

ABSTRACT Pulmonary embolism shows a wide spectrum ranging from clinically asymptomatic thrombus to massive thrombus, leading to cardiogenic shock. The purpose of this study was to determine the association between thrombus localization and risk factors, accompanying disorders, D-dimer and the red blood cell distribution width (RDW) in patients with pulmonary embolism.