[Correlation between average pulmonary artery pressure under rest and stress conditions in relation to the stage of silicosis].

The value of measuring the median pressure of the pulmonary artery for the prognosis of silicosis remains undebatable since the development of pulmonary heart disease has multifactorial causes and extreme interindividual variations. On the other side, during the course of silicosis disease, the increase of pressure is relatively small or even absent during years. Thus, measuring of mean pulmonary artery pressure is only required at larger intervals.