Stroke affects nearly 800,000 Americans each year. It is the fifth leading cause of death in the United States. A basilar artery stroke occurs when blood flow to the brain is interrupted. This can ...

Angioplasty is a catheterization procedure that opens arteries blocked or narrowed by a sticky material called plaque. The surgery involves passing a long, thin, flexible tube called a catheter across ...

Alpha-agonists act as vasoconstrictors and are thought to induce contraction of the smooth muscle of the penile helicine arteries of the corpora cavernosa, forcing blood out of the corpora ...