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[Long-term follow-up of pulmonary hypertension of unknown etiology]
Insights
Primary pulmonary hypertension (PPH) and anorexigen-induced pulmonary hypertension were studied. Anorexigen-induced cases show better life expectancy, offering insights into drug-induced vascular pathology.
Area of Science:
- Cardiology
- Pulmonary Medicine
- Pharmacology
Context:
- Study of 166 patients with primary pulmonary hypertension (PPH) from 1967 onwards.
- Clinical differentiation into three groups: PPH, anorexigen-induced, and embolism-induced pulmonary hypertension.
- Utilized echocardiography and cardiac catheterization for pressure assessment and prognostic factor identification.
Purpose:
- To differentiate etiopathogenetic factors in pulmonary hypertension.
- To compare prognostic predictive factors including right atrial mean pressure, cardiac output, and mixed venous saturation.
- To evaluate life expectancy differences between PPH and anorexigen-induced pulmonary hypertension groups.
Summary:
- Identified three clinical groups of pulmonary hypertension, with anorexigen-induced cases (aminorex fumarate) showing better prognosis than PPH.
- Right atrial mean pressure, cardiac output, and mixed venous saturation were identified as key prognostic indicators.
- Anorexigen-induced pulmonary hypertension serves as a model for drug-induced vascular pathology due to the transient nature of the causative agent.
Impact:
- Demonstrates distinct outcomes for different pulmonary hypertension etiologies.
- Highlights the prognostic value of specific hemodynamic parameters in cardiac catheterization.
- Provides a model for studying drug-induced vascular diseases, informing future therapeutic strategies.
Abstract:
Since 1967, 166 patients with primary pulmonary hypertension of unknown etiology have been followed-up at the Department of Cardiology at the University of Vienna. Although an exact etiopathogenetic differentiation was not possible, three groups of patients were identified clinically: patients with so-called primary pulmonary hypertension (PPH)--group 1; patients with pulmonary hypertension induced by anorexipens (aminorex fumarate)--group 2; and patients with pulmonary hypertension due to emboli in the large pulmonary vessels--group 3. In addition to non-invasive echocardiographic assessment of pulmonary pressures, regular cardiac catheterizations were carried out, which revealed right atrial mean pressure, cardiac output, and mixed venous saturation to be prognostic predictive factors. Patients with anorexigen-induced pulmonary hypertension have a clearly better life expectancy than those with PPH. Owing to the temporally limited effect of the pulmonary hypertension-inducing agent, aminorex fumarate (Menocil), patients with anorexigen-induced pulmonary hypertension may be considered a model group for drug-induced vascular pathology.