The aery most frequently responsible for bleeding in massive hemoptysis is

Answer is A (Bronchial Aery): The most common source of bleeding in massive hemoptysis are the Bronchial aeries which are pa of the high pressure systemic circulation The most common source of bleeding in hemoptysis is the tracheobronchial tree which can be affected by inflammation (bronchitis, bronchiectasis) or neoplasm (bronchiogenic carcinoma, endobronchial metastatic carcinoma or bronchial carcinoid tumor). The bronchial aeries which originate from either the aoa or from intercostal aeries, and are therefore pa of the high pressure systemic circulation are the source of bleeding in bronchitis, bronchiectasis or with endobronchial tumors ' `While alveolar haemorrhages arise from capillaries that are pa of the low pressure pulmonary circulation, bronchial bleeding is generally from bronchial aeries which are under systemic pressure and therefore predisposed to large volume bleeding'