 As PE and DVT are often considered as a similar disease, the investigators plan a prospective outcome study in which this progressive or new cutoff age X 10 μgL will be used in patients with suspected DVT. In this multicentre study, clinical probability will be assessed by the Wells score Table 1 and an ELISA D-dimer test Vidas D-dimer Exclusion test Biomérieux, Marcy lEtoile, Paris, France or an immuno-turbidimetric test Innovance D-dimer Siemens, Munich, Germany will be performed. Patients with a nonhigh or unlikely clinical probability with the Wells score and a normal new D-dimer cutoff will be considered as not having DVT, and will be followed for three-months to assess possible VTE recurrences. The main outcome will be the rate of thromboembolic events during a formal 3-month follow-up in patients not anticoagulated on the basis of this strategy. Patients with a D-dimer measurement above the age-adjusted cutoff will be investigated with CUS as currently admitted. 