The term “pulmonary hypertension” “means an increase in blood pressure within the arterial vessels of the lung due to the destruction, wall thickening, narrowing or obstruction of the vessels themselves. The mean pulmonary pressure is usually around 14 mmHg at rest: pulmonary hypertension begins when the mean pulmonary pressure exceeds 25 mmHg. This condition subjects the right ventricle (responsible for pumping blood to the lungs) to an overload of pressure and volume, which can lead to contractile insufficiency and decompensation. If not properly treated, pulmonary hypertension can escalate, causing further narrowing of blood vessels and aggravating typical symptoms of the disease.