Abstract
Aneurysms of the pulmonary trunk (PT) are rare. 1,2 They occur in patients with elevated pulmonary artery (PA) pressure due to primary PA hypertension, or secondary to congenital intracardiac shunts. They also occur in patients with normal PA pressures after pulmonary valve endocarditis, septic pulmonary emboli, syphilis or tuberculosis. 1,3 One-third of patients with PA aneurysms die suddenly, 2 either from dissection of the PA with direct rupture into the lungs or mediastinum or from retrograde extension into the pericardial sac with development of tamponade. 4,5 We report the first case of extensive dissection of the PA diagnosed during life, with intimai flaps and differential blood flow velocities in the true and false lumens seen by Doppler echocardiography.
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