[Significance of external respiratory indices in the diagnosis of pulmonary hypertension].

The results of the presented study include the parameters of pulmonary ventilation, respiratory volumes, pulmonary diffusion, oxygen saturation of arterial blood in patients with mitral stenosis, aortic valve insufficiency, and primary forms of pulmonary hypertension, as well as the dynamics of several parameters of pulmonary respiration in a group of patients following an alleviation of their circulatory insufficiency. Some pecularities of the changes in the studied parameters were demonstrated with reference to the peculiarities of the haemodynamic shifts in the pulmonary circulation, to the nature of pulmonary hypertension in particular, as well as the correlation between the severity of the functional disorders in the pulmonary respiration system and the severity of circulatory insufficiency. Some pathogenetic mechanisms of the changes of certain pulmonary respiration parameters were analysed in the mentioned pathological conditions. The importance of a compound dynamic study of the pulmonary respiration state is emphasized for an objective assessment of the degree and peculiarities of the functional disorders developing in these conditions, and for an evaluation of the efficacy of the conducted treatment.