Grudnaia khirurgiia (Moscow, Russia)
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Comparative Study
[Right-to-right arteriovenous shunting in the compensation of pronounced disorders of pulmonary ventilation].
The mechanism of compensation for disorders of ventilation after pulmonary tissue resection is discussed. It is shown that these disorders are attended with reduction of arterial pulmonary blood flow and that angiospasm occurs in the postcapillary part of the vascular channel of pulmonary circulation. The compensatory effect is achieved by a right-to-right arteriovenous shunt which prevents extreme increase of pressure in the pulmonary artery in ventilation disorders.
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The work deals with the results of biochemical and angiographic studies in 26 patients with thromboembolism of the pulmonary arteries (TEPA) and pulmonary hypertension of various degree. Acute occlusion of the pulmonary arterial channel calls forth a response of the organism's humoral regulating systems. The degree of hypertension of pulmonary circulation in TEPA, which is determined by the volume of affection of the pulmonary vascular channel, is directly dependent on the functional activity of the adaptation system and the severity of disorders of the intra- and intersystemic connections.