Abstract
A 3-year-old boy with unilateral absence of the right pulmonary artery had a lung scan that demonstrated 46% of total ventilation on that side. This had fallen to 39% by 2 years later, and at 11 years after the first study the value was 30%. Ventilation lung imaging may be useful in demonstrating the degree of ventilatory dysfunction in a lung compromised by absence of the pulmonary artery. Possible causes of the pulmonary damage are discussed.
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