[Subxiophoyd echocardiography: pulmonary artery or aorta (author's transl)].

Six patients with chronic obstructive pulmonary diseases, have been examinated by subxiophoyd echocardiography associated with ultrasonic contrast of right heart. It is detected that the vessel placed behind anterior cavity is aorta. This is confirmed by study of calcific aortic stenosis too, where the calcifications allows sure localisation of the vessel. Main pulmonary artery, or its branches, is instead visible behind aorta.