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[Problems of early detection of latent pulmonary hypertension--the value of ergometric tests and the correlation between pulmonary circulation and parameters of lung function (author's transl)].

The possibility of early detection of pulmonary hypertension is rather late according to the large capacity of the lung vessels in the condition of rest. Consequently the parameters of the pulmonary circulation were measured in 89 healthy subjects and 261 men suffering from silicosis in rest and bicycle exercise by means of the microcatheter technique and statistically compared with other parameters of lung function. In conclusion it can be said there is a statistical correlation between pressure at rest and during exercise conditions, but this is not available in an individual case. Furthermore the pressure values of persons suffering from silicosis are higher than those of the healthy group at rest and the pressure rise is higher in the ill group during exercise. Statistically there is a slight correlation between the pressure behavior and the FEV1, Rtot, PO2, DCO and of minor importance to VC, RC and FRC.