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Study identifier: NCT06372730 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Residual Pulmonary Vascular Obstruction Index Computed With Ventilation/Perfusion SPECT/CT Imaging to Predict the Risk of Venous Thromboembolism Recurrence in Patients With Pulmonary Embolism (PRONOSPECT)

Condition: Pulmonary Embolism · Venous Thromboembolism  ·  Sponsor: University Hospital, Brest

PhaseNA
Planned participants665
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Major risk after pulmonary embolism (PE) is recurrence, fatal in 10% of patients. Patients with PE can be stratified in 3 groups according to the risk of recurrence : very low risk, high risk or Intermediate risk. Little is known about this last group. Anticoagulation is efficient to prevent recurrence but is currently not recommended for patient with an intermediate risk of recurrence. Identifying risk factors of recurrent PE remains a major issue to identify sub-groups of patients who would require lifelong anticoagulation. In 30-40% of cases, PE patients develop residual pulmonary vascular obstruction (RPVO), which has been found to be associated with an increased recurrence risk. This last observation was mostly reported in patients with unprovoked PE (patients with high risk of recurrence) and RPVO was measured using conventional planar lung scan. In patients with an intermediate risk of recurrence, the impact of RPVO has been much less studied. In addition, the definition of RPVO was variable according to studies and correlation between RPVO burden and recurrence risk has not been clearly demonstrated. This might be explained by the inherent limitation of RPVO quantification using conventional planar imaging, which is only based on a visual estimation on 2-dimensional images. Ventilation/Perfusion Single Photon Emission Computed Tomography (V/Q SPECT/CT) is a new method of scintigraphic image acquisition that offers the advantage of 3-dimensional imaging, enabling …

This description comes directly from the study's public registry record.

Talk to the study team

Pierre-Yves LE ROUX, Pr  ·  +33298223327  ·  pierre-yves.leroux@chu-brest.fr

Always discuss trial participation with your own doctor first.

Locations (13)

CHU AmiensAmiens, France, FranceRecruiting
CHU AngersAngers, France, FranceActive Not Recruiting
CHU BrestBrest, France, FranceRecruiting
Hôpital Louis MourierAP-HPColombes, France, FranceRecruiting
CHD Vendée - La Roche sur YonLa Roche-sur-Yon, France, FranceRecruiting
Kremlin-Bicêtre AP-HPLe Kremlin-Bicêtre, France, FranceActive Not Recruiting
CH Les Sables d'OlonneLes Sables-d'Olonne, France, FranceRecruiting
Hegp Ap-HpParis, France, FranceRecruiting
CH QuimperQuimper, France, FranceRecruiting
CHU St-EtienneSaint-Etienne, France, FranceRecruiting
CHIC ToulonToulon, France, FranceRecruiting
HIA ToulonToulon, France, FranceRecruiting

+ 1 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT06372730