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Definition of Pulmonary arterial hypertension

Pulmonary arterial hypertension Definition from Medicine Dictionaries & Glossaries
Lung Diseases Glossary
Pulmonary arterial hypertension (PAH) is continuous high blood pressure in the pulmonary artery. The average blood pressure in a normal pulmonary artery is about 14 mmHg when the person is resting. In PAH, the average is usually greater than 25 mmHg.
PAH is a serious condition for which there are treatments but no cure, and treatment benefits many patients.
There are 2 types of PAH:
Primary (PPAH) is inherited or occurs for no known reason.
Secondary (SPAH) is caused by, or occurs because of another condition. The conditions include chronic heart or lung disease, blood clots in the lungs, or a disease like scleroderma.
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Sources: DHHS, NIH and NHLBI
Pulmonary arterial hypertension Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Pulmonary hypertension (PH) is an increase of blood pressure in the pulmonary artery, pulmonary vein, or pulmonary capillaries, together known as the lung vasculature, leading to shortness of breath, dizziness, fainting, leg swelling and other symptoms. Pulmonary hypertension can be a severe disease with a markedly decreased exercise tolerance. It was first identified by Ernst von Romberg in 1891. According to the most recent classification, it can be one of six different types.

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