Pulmonary arterial hypertension (PAH) is an infrequent manifestation o
f the primary antiphospholipid syndrome (PAPS). It may appear due to d
ifferent mechanisms although the most common cause is recurrent pulmon
ary embolisms. In some cases the thrombi do not dissolve and organize
to form fibrous masses which occlude the pulmonary veins giving place
to chronic thromboembolic pulmonary hypertension, When the thrombi are
located in the proximal arteries, thromboendarterectomy may be curati
ve. The first case of a patient with PAPS diagnosed with PAH secondary
to chronic thrombosis of the proximal pulmonary arteries, in whom a s
uccessful pulmonary thromboendarterectomy was performed is herein repo
rted.