The exact number of people who have pulmonary hypertension (PH) isn't known.
Group 1 pulmonary arterial hypertension (PAH) without a known cause is rare. It affects women more often than men. People who have group 1 PAH tend to be overweight.
PH that occurs with another disease or condition is more common.
PH usually develops between the ages of 20 and 60, but it can occur at any age. People who are at increased risk for PH include:
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.