A swelling or enlargement of a part of an artery, resulting from weakening of the arterial wall.
autonomic nervous system
The part of the nervous system that regulates involuntary functions, such as heart rate, blood pressure, digestion, and sweating.
A condition that occurs when there is widespread dilation of the small arterioles, small venules, or both.
The presence of abnormally large amounts of fluid between cells in body tissues, causing swelling of the affected area.
A condition in which the internal body temperature falls below 95 degrees Fahrenheit (35 degrees Celsius), usually as a result of prolonged exposure to cool or freezing temperatures.
Circulatory failure caused by paralysis of the nerves that control the size of the blood vessels, leading to widespread dilation; seen in patients with spinal cord injuries.
Shock that occurs when there is a block to blood flow in the heart or great vessels, causing an insufficient blood supply to the body's tissues.
Circulation of blood within an organ or tissue in adequate amounts to meet the cells' current needs.
Shock caused by a sudden temporary reduction in blood supply to the brain that causes fainting (syncope).
A condition in which the circulatory system fails to provide sufficient circulation to enable every body part to perform its function; also called hypoperfusion.