About pulmonary hypertension
In pulmonary arterial hypertension (PAH), blood pressure in the arteries that carry blood from the heart to the lungs increases significantly. This causes the heart to work harder to pump blood through these arteries . This can lead to fatigue, shortness of breath, and, over time, even heart failure.
Normal function of the pulmonary and cardiac systems
To better understand pulmonary arterial hypertension (PAH), it’s important to first understand that the human heart receives deoxygenated blood and transports it to the lungs via the pulmonary arteries for oxygenation. Oxygen-rich blood returns to the heart via the pulmonary veins and is distributed throughout the body.
Normally, the pressure in the pulmonary arteries is lower than in the rest of the circulatory system. However, in pulmonary arterial hypertension (PAH), the walls of the pulmonary arteries thicken, stiffen, or narrow, impeding blood flow. As a result, the heart has to work harder to pump blood.
Causes of pulmonary hypertension
Pulmonary hypertension can be primary (idiopathic) or secondary (due to another disease) . The most common causes include:
1. Genetic causes (idiopathic)
Some people develop pulmonary arterial hypertension (PAH) for unknown reasons, but these may have a genetic basis . In these cases, a defect in the BMPR2 gene, which regulates the growth of cells lining blood vessels, is often observed.
2. Autoimmune diseases
Certain diseases such as lupus, scleroderma, and rheumatoid arthritis can cause inflammation and damage to the blood vessels in the lungs, which over time can lead to pulmonary hypertension.
3. Congenital heart defect
A hole between the ventricles or atria can cause abnormal blood flow into the pulmonary arteries, resulting in increased pressure in the pulmonary arteries.
4. Infection or medication
Certain diet pills, stimulants, and drugs like cocaine can damage the pulmonary arteries.
5. Chronic lung diseases
Diseases such as chronic obstructive pulmonary disease (COPD) or pulmonary fibrosis can reduce oxygen supply and increase pressure in the lungs.
Symptoms of pulmonary hypertension
In the early stages, symptoms of pulmonary hypertension are often mild and can be mistaken for fatigue or anxiety. As the disease progresses, symptoms become more severe:
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Breathing difficulties (especially during physical activity)
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general fatigue and weakness
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Chest pain or tightness
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Dizziness or fainting
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Swelling of the feet or ankles
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pale or blue lips (cyanosis)
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fast or irregular heartbeat
In later stages, patients may experience difficulty breathing even at rest and develop symptoms of right heart failure.
Guide to the wastewater system
How is pulmonary hypertension diagnosed?
For an accurate diagnosis of pulmonary hypertension, specific tests are required. Doctors often combine several tests and imaging techniques:
1. Echocardiography
The first and most important test is the pulmonary artery stress test. This assesses pulmonary artery pressure and right ventricular function.
2. Right heart catheterization
This is a standard procedure for diagnosing pulmonary arterial hypertension (PAH) . It involves inserting a thin tube (catheter) into the arteries of the heart and lungs to measure blood pressure.
3. Lung function test
Have your lungs checked to make sure your high blood pressure isn’t caused by a lung disease.
4. CT or MRI
Monitoring the structure of pulmonary blood vessels, detecting thrombi and assessing the thickness of blood vessel walls.
5. Blood tests
Identify autoimmune diseases, infections, or anemia that may cause pulmonary hypertension.
Types of pulmonary hypertension
According to the classification of the World Health Organization (WHO), pulmonary hypertension is divided into five categories:
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Group 1: Pulmonary hypertension (primary or hereditary pulmonary hypertension)
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Group 2: Pulmonary hypertension due to left heart disease
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Group 3: Pulmonary hypertension due to lung disease or hypoxia
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Group 4: Pulmonary hypertension due to chronic thrombosis (chronic pulmonary embolism)
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Group 5: Polycyclic aromatic hydrocarbons of unknown or multifactorial origin
On medical websites and resources, the term PAH usually refers to Group 1.
Treatment of pulmonary hypertension
Treatment for pulmonary arterial hypertension (PAH) aims to lower blood pressure, relieve symptoms, and prolong life . Treatment includes medication, oxygen therapy, and sometimes surgery.
1. Medications
The main classes of drugs used to treat pulmonary hypertension include:
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Prostaglandins (e.g. epoprostenol, iloprost): cause pulmonary vasodilation.
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Endothelin receptor antagonists (bosentan, ambrisentan): prevent the narrowing of blood vessels.
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Phosphodiesterase type 5 inhibitors (sildenafil, tadalafil): Similar to medications for erectile dysfunction, these work by dilating the blood vessels.
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Guanylate cyclase activators (riociguat): improve pulmonary blood flow.
2. Oxygen therapy
In patients with low blood oxygen levels, continuous administration of oxygen can reduce pressure in the lungs.
3. Diuretics
They serve to reduce fluid accumulation in the body and reduce the strain on the heart.
4. Anticoagulants
Some people are prescribed this medication by doctors to prevent blood clots in the lungs.
5. Lung or heart-lung transplantation
In severe and difficult-to-treat cases, organ transplantation may be the only life-saving option.
Lifestyle and care of patients with pulmonary hypertension
In addition to taking medication, lifestyle changes play an important role in controlling the course of the disease:
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Avoid sudden and strenuous actions.
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Maintain a healthy weight and eat a low-salt diet.
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Avoid smoking and consuming alcohol.
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Vaccines against influenza and pneumococcal infection
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Pay attention to your mental health ; anxiety can worsen symptoms.
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Pre-pregnancy advice : Pregnancy in patients with pulmonary hypertension is very dangerous and should be carried out under medical supervision.
Diagnosis of pulmonary hypertension
In the past, the average life expectancy of patients with pulmonary hypertension was only a few years. However, with the development of targeted medications, life expectancy and quality of life have improved significantly. Early detection and adherence to treatment are crucial factors for ultimate effectiveness.
Finally
Pulmonary arterial hypertension (PAH) is a serious but treatable condition in which the blood vessels in the lungs narrow and harden. This condition can lead to increased pressure in the right ventricle of the heart and ultimately to heart failure.
Early detection, regular treatment, special medications, and a healthy lifestyle can help patients live long and healthy lives.