[Instantaneous velocity parameters of expiration in patients with congenital heart disease].
Nineteen patients suffering from congenital heart diseases were examined by means of the apparatus Pneumoscreen manufactured by Eger Company (FRG) and the mechanocardiograph H-106 designed by N. I. Savitsky, which synchronously recorded the curves of the volumetric speed of the flow and intrathoracic pressure. Analysis was made of the relationship of the magnitude of the instant maximal velocity characteristics of forced expiration in all lung capacities and their time-course of changes to the total pulmonary resistance. It is revealed that the decrease of the maximal velocity characteristics of forced expiration in large pulmonary capacities was directly proportional to the degree of pulmonary tissue rigidity in patients with congenital heart diseases and corresponded to the degree of hemodynamic disorders in pulmonary circulation. The fall of the instant velocity of forced expiration in small lung capacities in patients with congenital heart diseases evidences not only the presence of bronchial obstruction but also high total pulmonary resistance.
Ioffe
L Ts
LTs
Dzhoshibaev
S D
SD
Men'shukova
A A
AA
D000293:Adolescent; D000328:Adult; D005260:Female; D005540:Forced Expiratory Flow Rates; D006330:Heart Defects, Congenital / Q000503:physiopathology*; D006801:Humans; D008297:Male
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