Source:http://linkedlifedata.com/resource/umls/id/C0020542
MSH: Increased VASCULAR RESISTANCE in the PULMONARY CIRCULATION, usually secondary to HEART DISEASES or LUNG DISEASES.,CSP: increased pressure with the the pulmonary circulation, usually secondary to cardiac or pulmonary disease.,MEDLINEPLUS: <p>Pulmonary hypertension is high blood pressure in the arteries to your lungs. It is a serious condition for which there are treatments but no cure. If you have it, the blood vessels that carry oxygen-poor blood from your heart to your lungs become hard and narrow. Your heart has to work harder to pump the blood through. Over time, your heart weakens and cannot do its job and you can develop <a href='http://www.nlm.nih.gov/medlineplus/heartfailure.html'>heart failure</a>. </p><p>There are two main kinds of pulmonary hypertension. One runs in families or appears for no known reason. The other kind is related to another condition, usually <a href='http://www.nlm.nih.gov/medlineplus/heartdiseases.html'>heart</a> or <a href='http://www.nlm.nih.gov/medlineplus/lungdiseases.h