Pulmonary hypertension (PH) is classified into 5 clinical subgroups according to 2022 European Society of Cardiology (ESC) and European Respiratory Society (ERS) Guidelines,PH affects approximately 1% of the global population, and over half of patients with heart failure may be affected. The Preliminary tests in patients with symptoms and physical findings suggestive of PH include blood tests, immunology ,electrocardiography, chest radiography, pulmonary function tests ,6MWD and Transthoracic echocardiography is used to estimate the probability of PH. All patients with suspected PH without confirmed left-sided heart or lung diseases, should have Right-sided heart catheterization is essential for accurate diagnosis and classification