Pulmonary hypertension is very high pressure in the systemic circulation and pulmonary (lung) circulation. The left and right heart distributes and returns blood.
The systemic circulation is the circulation distributing the blood from the left side of the heart, throughout the body. The pulmonary (lung) circulation is the distribution of the blood from the right side of the heart to the lungs.
The left ventricle of the heart pumps oxygenated blood from the lungs into the systemic circulation.
The measurement of the blood pressure on a person's arm is the measurement of the systemic circulation. When the pressure is high, the patient has a hypertension.
The right ventricle pumps venous blood which returns from the body into the arteries of the lungs to get enriched with oxygen.
The high blood pressure measured on a person's arm is hypertension. Pulmonary hypertension is the low pressure in the lung arteries comparing with the pressures in the systemic circulation. Increased pressure in the pulmonary circulation is pulmonary hypertension.
Pulmonary hypertension appears when the blood vessels tighten, it prevent the supply of blood to the lungs. Blood can not pass through the lungs and be pumped with the heart. It causes the enlargement of the heart and the appearance of fluid in the liver and tissues.
The symptoms are shortness of breath and dizziness.
Pulmonary hypertension is caused by diseases of the heart and the lungs, failure of the left heart ventricle, recurrent pulmonary embolism, scleroderma, chronic low blood oxygen levels.
There is primary and secondary pulmonary hypertension.
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