See also: List of crossings of the Susquehanna River and List of dams and reservoirs of the Susquehanna River. The Susquehanna River has played an important role in the transportation history of the United States. Prior to the 1818 opening of the Port Deposit Bridge, the river formed a barrier between the northern and southern states, as it could be crossed only by ferry.
A. Hypertension is the medical term for high blood pressure. Both terms mean the same thing. Hypertension (high blood pressure) is defined as having a blood pressure reading of more than 140/90 mmHg over a number of weeks.
Pulmonary hypertension is a hemodynamic state defined by a resting mean pulmonary artery pressure at or above 25 mm Hg. Because this definition is based on hemodynamic criteria, pulmonary hypertension can be the result of a variety of diseases of different causes. Pulmonary arterial hypertension (PAH), however, should be distinctly differentiated from pulmonary venous hypertension resulting from left heart disease. PAH is characterized by elevations in the pulmonary arterial pressure and pulmonary vascular resistance (PVR) leading to right ventricular failure and premature death.