Hypertension or high blood pressure is the common condition of when blood pressure, the force of your blood pushing against the walls of your blood vessels, is consistently high.   Most of us are familiar with and have a basic understanding of it.  But there is another type of hypertension we may have heard of but are not clear on exactly what is means.  This hypertension is called pulmonary hypertension or PH and is when a person has high blood pressure in the lungs.  It can also be referred to as pulmonary arterial hypertension or PAH.