Pulmonary trunk dilatation

Last revised by Yuranga Weerakkody on 19 Oct 2023

Dilatation of the pulmonary trunk or dilatation of the main pulmonary artery (mPA) has a range of causes, and is often (though not always) associated with pulmonary hypertension. Most publications suggest an upper limit of normal in the region of 29-33 mm 1, which can be higher in males 7. Other publications also suggest the pulmonary trunk to aortic ratio as an additional useful measure (where the normal ratio in most cases is around 1:1 or less).

Pathology

Etiology 

See also

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