CT and CT angiography in massive haemoptysis with emphasis on pre-embolization assessment.

Massive haemoptysis is a respiratory emergency. Computed tomography angiography (CTA) can play a crucial role in assessing the cause and origin of the haemoptysis and directing the interventional radiologist prior to treatment. The bronchial arterial supply and to a lesser extent the non-bronchial systemic arterial supply are responsible for the majority of cases of massive haemoptysis, but uncommon causes of massive haemoptysis should be considered to avoid misdiagnosis and delayed treatment. Failure to assess the imaging appropriately prior to endovascular treatment may result in early recurrent massive haemoptysis or patient death.