Pulmonary hypertension is a condition that affects the blood vessels in the lungs. It develops when the blood pressure in your lungs is higher than normal. About 1% of people globally have pulmonary hypertension . Pulmonary hypertension (PH) is a pathophysiological disorder, which may involve multiple clinical conditions and may be associated with a variety of cardiovascular and respiratory diseases. The complexity of managing PH requires a multi-faceted, holistic, and multidisciplinary approach, with active involvement of the patients with PH in partnership with clinicians. In recent years, substantial progress has been made in detecting and managing PH, and new evidence is timely integrated in this ... Learn about pulmonary hypertension , a condition of increased blood pressure in the lungs, its causes, symptoms, diagnosis, and treatment. Find out the different types, risk factors, and classification of pulmonary hypertension according to WHO. Pulmonary hypertension encompasses a diverse group of conditions characterized by high pulmonary pressures. The World Health Organization classifies pulmonary hypertension into 5 clinical groups based on pathophysiology, hemodynamic characteristics, clinical features, and management (see Table 1. Clinical Classification of Pulmonary Hypertension ).[1]