Definition of cause for English Language Learners. : 1  something or someone that produces an effect, result, or condition : something or someone that makes something happen or exist. : 2  a reason for doing or feeling something. : 3  something (such as an organization, belief, idea, or goal) that a group or people support or fight for.
Though PH patients have 68% probability of surviving after the first year of diagnosis, and the chances decrease to 34% four years later, according Ohio State University Lung Center, early diagnosis is critical in increasing the pulmonary hypertension life expectancy.
Treatment for pulmonary hypertension is com-. plex but is most rewarding if the underlying cause is. found and appropriate treatment is initiated early. The normal mean pulmonary arterial pressure ranges. from 10 to 15 mm Hg in dogs. Pulmonary hypertension. is defined as a mean pulmonary arterial pressure greater.