Sudden vasoconstriction.

sudden constriction of a blood vessel resulting in decreased blood flow

spasm of blood vessels which decreases their diameter.

an abnormally strong and persistent contraction of the muscles of the coronary arteries which leads to transmural myocardial ischemia and often results in sudden cardiac death

Prolonged and profound constriction of blood vessels leading to inadequate blood supply to a tissue or organ.

A state of spasm tightening and narrowing of blood vessels around a brain aneurysm that are irritated by the blood from cerebral hemorrhage. The body's own attempt to prevent a second hemorrhage by restricting the flow of blood around the aneurysm.

Narrowing of a blood vessel, typically in response to the initial rupture of an aneurysm.

sudden involuntary contraction of a blood vessel; abnormal

Spasm of blood vessels, decreasing their diameter.

exaggerated, persistent contraction of the walls of a blood vessel.

A dangerous side effect of subarachnoid hemorrhage in which the blood vessels in the subarachnoid space constrict erratically, cutting off blood flow.

a stroke caused by stoppage of blood flow in the brain due to a tumor or brain swelling

abnormal narrowing or constriction of arteries due to irritation by blood in the subarachnoid space.

A narrowing of an artery that brings blood to the brain, heart or other organs. This results in diminished blood flow at that site.

Vasospasm refers to a condition in which blood vessels spasm, leading to vasoconstriction. This can lead to tissue ischemia and death (necrosis). Cerebral vasospasm may arise in the context of subarachnoid hemorrhage.