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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