Primary pulmonary hypertension. A national prospective study.

Area of Science:

• Cardiology
• Pulmonology
• Epidemiology

Background:

• Primary pulmonary hypertension (PPH) is a rare and severe condition.
• A national registry was established to gather data on PPH patients.

Purpose of the Study:

• To characterize the clinical presentation and diagnostic interval of patients with primary pulmonary hypertension.
• To identify factors influencing diagnosis and highlight the need for earlier detection.

Main Methods:

• Data collected from 32 centers on 187 PPH patients diagnosed using uniform criteria.
• Analysis of patient demographics, symptoms, medical history, and diagnostic test results.

Main Results:

• Mean age of diagnosis was 36 years, with a 1.7:1 female-to-male ratio.
• Common symptoms included dyspnea (60%), fatigue (19%), and syncope (13%).
• Pulmonary function showed restriction, reduced diffusing capacity, and hypoxemia; hemodynamic data revealed elevated pressures and reduced cardiac index.

Conclusions:

• A significant delay exists between symptom onset and diagnosis of PPH, averaging two years.
• The findings underscore the urgent need for improved diagnostic strategies to facilitate earlier identification of PPH.