[Long-term course of primary vascular pulmonary hypertension with and without intake of appetite depressants].

1. The long-term follow-up of 22 patients with anorectic drug intake (aminorex fumarate) (AS) and PVPH is compared to 38 patients with PVPH of unknown etiology. 2. The 10-year cumulative survival rate is significantly higher for the AF-positive group (54 +/- 11%) than for the AF-negative patients (15 +/- 6%). 3. In terms of the hemodynamic parameters at the time of diagnosis, there were no differences between the two patient groups. 4. Hemodynamic serial controls in the AF-positive group often show a decrease in pulmonary pressure at rest, in contrast to the AF-negative group. However, in all but one of the patients with a pressure drop at rest there is a considerable increase in pulmonary pressure during exercise. 5. In neither group any correlation is to be found between pulmonary pressure and survival time.