Maximal mouth pressure will be evaluated for determine respiratory muscle strength, m. pectoralis, m. serratus anterior, m. sternocloideumasteoideus and quadriceps muscles strengths will be measured to evaluate accessory respiratory muscle strength, London chest activity of daily living scale will be done for assessment of dyspnea and six minute walk test will be used for determination of functionally capacity

Maximal mouth pressure will be evaluated for determine respiratory muscle strength, m. pectoralis, m. serratus anterior, m. sternocloideumasteoideus and quadriceps muscles strengths will be measured to evaluate accessory respiratory muscle strength, London chest activity of daily living scale will be done for assessment of dyspnea and six minute walk test will be used for determination of functionally capacity

subjective and objective measurement will be performed in patients with PAH

pectoralis muscle strength will be evaluated with hand held dynamometers according to muscle test technique

Serratus anterior muscle strength will be evaluated with hand held dynamometers according to muscle test technique

sternocleidomasteoideus muscle strength will be evaluated with hand held dynamometers according to muscle test technique

Respiratory mouth pressure will be measured to determine maximally inspiratory pressure and maximally expiratory pressure according to ATS/ERS guidelines.

Six minute walk test will be performed to evalute functionally exercise capacity according to ATS/ERS guidelines

London Chest Activity of Daily Living Scale will be used to sensation of dyspnea during activity of daily living.The scale consists of four domains: self-care (four items), domestic (six items), physical (two items) and leisure (three items). In total, the scale consisting of 15 items scored of 0 to 5. 0 means that "I wouldn't do anyway" and 5 means that "Someone else does it for me". Higher values indicate greater limitation due to the dyspnea