ABSTRACT
Pulmonary embolism (PE) and deep vein thrombosis are two facets of the same disease,
that is, venous thromboembolism (VTE). In patients with angiographically proven PE,
the prevalence of proximal deep vein thrombosis by venography is around 70%. The sensitivity
of compression ultrasonography (US) for the diagnosis of acute VTE in patients with
a suspicion of PE is between 40 and 60%, with a high specificity (96 to 100%). Taking
into account the 20 to 30% prevalence of PE in a population consulting for suspicion
of this disease, the first line use of compression US will allow the diagnosis of
acute VTE in half of patients with confirmed PE, that is, in 10 to 15% of patients
addressed for suspicion of PE. In outpatients, the first line use of D-dimers which
will exclude acute VTE in one-third of the initial population will slightly increase
the reliability of compression US as a first imaging test. New tools of looking for
deep vein thrombosis, such as computed tomographic venography coupled with computed
tomographic pulmonary angiography, could become an interesting approach in the diagnostic
strategy of PE, but require adequate evaluation in prospective studies.
KEYWORD
Pulmonary embolism - deep vein thrombosis - compression ultrasonography - CT venography
- diagnosis