PAH stands for pulmonary arterial hypertension. In this condition, one experiences high blood pressure; however, unlike the more common high BP, those with PAH experience elevated blood pressure near the lungs. This is because, in PAH, the arteries reaching the lungs become narrow due to blockage and create pressure.

If you are wondering what are the causes of PAH, here are some of them:

1. Family history
Family history is one of the most common predictors of pulmonary arterial hypertension. For those affected by PAH or who have a history of PAH, it is advisable to consult a doctor immediately, as their chances of acquiring PAH are also high. This is because genes that lead to PAH may have also passed down from their ancestors to them.

2. Heart-related problems
Those born with heart diseases or disorders have a higher chance of acquiring PAH. Research has found a strong correlation between children born with congenital heart disease and the development of PAH in later stages of their lives. In this condition, the structure of the heart is affected, hindering normal blood flow.

3. Blood clots
Blood clots are another common cause of PAH. Usually, blood clots that develop naturally dissolve over time. In some instances, they do not dissolve and cause blockages in the blood vessels. These blood clots can be formed due to any reason, including trauma or injury in any area of the body. They can travel through the veins and reach the pulmonary artery, where it stays and causes PAH. This is a treatable condition. However, symptoms of PAH may take years before showing.

4. Lung diseases
Lung disorders or diseases can also cause PAH. Conditions such as cirrhosis of the liver or portal hypertension are positively related to the development of PAH. Diseases that affect the oxygen transport to the lungs, such as COPD, sleep apnea, or pulmonary fibrosis, also lead to pulmonary arterial hypertension.

5. HIV
HIV can also be a cause of PAH. Research has found that the prevalence of PAH is quite common in people with HIV, as it directly affects the lungs. It is so common that the chances of an HIV-infected person getting PAH are higher than that of a non-HIV person. HIV also reduces the chances of survival for the patient.

6. Illicit substances
It may not be common knowledge, but illicit substances may cause PAH. Those taking methamphetamine are at a higher risk of acquiring PAH than others. The result of PAH induced to these substances is so severe that one’s life span can shorten drastically. The chances of survival are also low in cases of intravenous substances.

This article sheds light on the causes of PAH. If one has any of the symptoms related to the condition, they should consult a doctor immediately.