Q: Which set of arteries usually a cause of massive hemoptysis (select one) 

A) BRONCHIAL 
B) PULMONARY 


Answer: A 

Though most of the circulation requires passing through the pulmonary vasculature bed but the cause of hemoptysis is usually bronchial arteries, proved otherwise. This is due to the high systolic pressure because of their origin from the aorta (sometimes from the intercostal or vertebral arteries). Another reason is their vital supply to hilar lymph nodes, visceral pleura, and to the mediastinum.



Reference:

Cahill BC, Ingbar DH. Massive hemoptysis. Assessment and management. Clin Chest Med 1994; 15:147.