Pulmonary hypertension is a type of high blood pressure that affects the arteries in the lungs. Pulmonary hypertension is a hemodynamic state defined by a resting mean pulmonary artery pressure at or above 25 mm Hg.1. Pulmonary hypertension can be the result of a variety of diseases of different causes. Pulmonary Hypertension causes symptoms such as shortness of breath during routine activity (for example, climbing two flights of stairs), tiredness, chest pain, and a racing heartbeat. As the condition worsens, its symptoms may limit all physical activity.