Treatment for PAH depends on the needs of each individual and the severity of his or her PAH. The most commonly used measures of severity are WHO functional class (WHO stands for World Health Organization) and 6-minute walk distance.
After talking to you about your symptoms, your doctor will determine your WHO functional class.
Your 6-minute walk distance is the distance you can walk in 6 minutes at your fastest comfortable pace. Measured by the six-minute walk test (6MWT), it helps your doctor evaluate your PAH and decide on the best treatment for you.
