349 cases of morphological alteration of pulmonary vessels with complex inborn heart defects (major vessels transposition with intraventricular septum deficiency, Taussig-Bing anomaly, double vessels departure from the right ventricle, common arterial trunk, single heart ventricle) were studied by the time and growth speed of structural vascular changes of lung circulation in correspondence with classification of Heath-Edwards. It is established that formation of morphological changes of pulmonary vessels in those defects takes place during the first half of year of patient life. Most malignant vascular changes occur in common arterial trunck and transposition of major vessels with a defect of the interventricular septum. A isolated defect of interventricular septum, single ventricle, double departure of vessels from the right ventricle show a relatively favourable course of the disease.