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Real members of myPHteam have posted questions and answers that support our community guidelines, and should not be taken as medical advice. Looking for the latest medically reviewed content by doctors and experts? Visit our resource section.

Idiopathic PAH,WHO Group 1, function level?

October 17, 2025
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While this question is specifically about UVA Virginia Pulmonary Clinic, it's important to note that PAH specialists, including pulmonologists and cardiologists with specialized training, are essential for proper treatment. These specialists understand the nuances of PAH and can provide targeted treatments specific to your Show Full Answer

While this question is specifically about UVA Virginia Pulmonary Clinic, it's important to note that PAH specialists, including pulmonologists and cardiologists with specialized training, are essential for proper treatment. These specialists understand the nuances of PAH and can provide targeted treatments specific to your condition. Regarding WHO functional classes, there are four levels that describe PAH severity based on symptoms:

• Class 1: No symptoms during exercise or rest
• Class 2: No symptoms at rest, but discomfort with daily activities
• Class 3: Symptoms possible at rest, significant daily activity limitations
• Class 4: Symptoms at rest, severe symptoms with any physical activity

Your functional class helps determine which treatments your healthcare provider will recommend.

October 17, 2025

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