[Ventilation-perfusion pulmonary scintigraphy for diagnosis of pulmonary thromboembolism]

Ventilation-perfusion pulmonary scintigraphy with analysis ofventilation-perfusion ratio, apex-base ventilation and perfusion gradient, pulmonary perfusion, and the condition of alveolar permeability at the 10th and 30th min after inhalation of radiopharmaceutical was carried out in 16 patients with clinical and scintigraphic signs of thromboembolism of distal pulmonary artery branches and 10 controls. Thromboembolism of distal pulmonary artery branches was manifested by an increase in apex-base ventilation and perfusion gradient in both involved and intact lungs vs. the same parameters in healthy people. Patients with bilateral thromboembolism of distal pulmonary artery branches were characterized by an increase in ventilation-perfusion ratio and retardation of alveolar permeability.