Cardiac Radiography > Pathology > Pulmonary Vascular Patterns > Pulmonary Arterial Hypertension

Pulmonary Vascular Patterns: Pulmonary Arterial Hypertension

Pulmonary arterial hypertension results from elevation of the resistance in the pulmonary arterial bed, usually at the arteriolar level. It is characterized radiographically by enlargement of the pulmonary trunk and right and left main pulmonary arteries with disproportionately small peripheral vessels (see figure below). This has been referred to as "pruning" of the pulmonary arteries.


Pulmonary arterial (precapillary) hypertension in a patient with scleroderma. There is enlargement of the central pulmonary arteries with normal to small size peripheral vessels. 


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