|It is characterized by rising in blood pressure in the pulmonary artery and pulmonary vein which leads to shortness of breath, dizziness, fainting, leg swelling etc. it can be diagnosed by pulmonary function tests, blood tests except HIV, ECG, arterial blood gas measurements, X-rays of the chest, CT scanning. Pulmonary hypertension can be treated by diuretics, beta blockers, ACE inhibitors etc.The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number ofÂ citationsÂ to recent articles published inÂ science and social science journals in a particular year or period, and is frequently used as aÂ proxyÂ for the relative importance of a journal within its field. It is first devised byÂ Eugene Garfield, the founder of theÂ Institute for Scientific Information.The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.