Cardio-respiratory Studies in a Patient with an Absent Left Pulmonary Artery

Chronic idiopathic pulmonary hilar fibrosis: A clinicopathological entity

“…Angiograms and differential lung function tests show diminution or complete absence of pulmonary artery flow to the affected lung with low or absent oxygen uptake. It is to be noted that interruption of pulmonary artery flow to one lung does not necessarily mean that this lung has no respiratory function (Landrigan, Purkis, Roy, and Cudkowicz, 1963). This is because the increased collateral bronchial circulation may be useful in eliminating C02 and so reducing the physiological dead space and the obligatory minute ventilation.…”