"Pulmonary" is a phrase that refers back to the lungs. Hypertension is elevated blood pressure. Pulmonary hypertension, in response to the PHA (pulmonary hypertension affiliation) refers to a blood vessel disorder in the lungs in which the blood pressure throughout the blood vessels in the lungs raises to a dangerously excessive level. In keeping with the PHA, pulmonary hypertension happens when the blood vessels in the lungs begin to constrict and get smaller, even stiffer, thus making the center pump tougher and harder to attempt to squeeze...