"Pulmonary stenoses are a common cause of chronic cor pulmonale and obstruct the flow of blood from the pulmonary circulation into the systemic system. They can be congenital (caused by a ventricular septal defect (VSD) or pulmonary artery defect, or embolism) or acquired - turbulent blood flow, after heart surgery. Rarely developing, Acute Stenotic Severe Aortic coarctation affects the thoracic aorta, while pulmonary stenoses cause blood to be retained in the pulmonary circulation." - translation of the description of pulmonary stenosis, which was taken from the Yandex.Tutor service.
The most common causes of stenosis are:
Interventricular valve defect; Rarely - polycystosis and systemic lupus erythematosus; Heart failure provokes stenosis only after decades. As the disease progresses and the situation worsens, symptoms may appear: pain in the chest and back; fatigue and weakness; excessively dry skin and pale face; cyanotic nasolabial triangle; insufficiency of cerebral and peripheral circulation; muscle atrophy and cramps; thinning fingertips; increased breathing and heart rate.