Pulmonary arterial hypertension is caused by narrowing of the blood vessels in the lungs. Learn how it happens, including ...

Portal Hypertension Symptoms and Their ComplicationsPortal hypertension is a condition in which increased pressure within the portal vein—an important vessel that carries blood from the stomach ...

Hypertension (high blood pressure) can lead to dangerous complications, but it typically doesn't cause noticeable symptoms. Most people don't know they have it until they are diagnosed. Hypertension ...