Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «S»:
Stress test, radionucleide
Stress test, radionucleide: See: Radionuclide stress test....
Stress testing, exercise cardiac
Stress testing, exercise cardiac: The exercise cardiac stress testing (ECST) is the most widely used cardiac (heart) screening test. The patient exercises on a treadmill according to a standardized protocol, with progressive increases in the speed and elevation of the treadmill (typically changing...
Stretch, quadriceps: An exercise to stretch the quadriceps muscle, the large muscle in the front of the thigh.
To do this exercise, lie on your left
side, on the floor. Your hips should be lined up so that
the right one is directly above the left one. Rest your
head on a pillow or your left hand...
Striatum: Part of the basal ganglia of the brain. The basal ganglia are interconnected masses of gray matter located in the interior regions of the cerebral hemispheres and in the upper part of the brainstem.
The striatum is also called the striate body. It includes the caudate nucleus and the lenti...
Stricture: An abnormal narrowing of a body passage, especially a tube or a canal. The stricture may be due, for example, to scar tissue or to a tumor. Stricture refers to both the process of narrowing and the narrowed part itself.
A stricture is also anything that closely restrains or limits. Sha...
Stricture of the esophagus, chronic
Stricture of the esophagus, chronic: A narrowing or
closure of the normal opening of the swallowing tube leading to the stomach, usually
caused by scarring from acid irritation. A common complication of chronic gastroesophageal
reflux disease (GERD). Several procedures are available for stretching (...
Stricture, esophagus, acute
Stricture, esophagus, acute: A narrowing or closure of
the normal opening of the swallowing tube leading to the stomach, usually caused by
scarring from acid irritation. Acute, complete obstruction of the esophagus occurs when
food (usually meat) is lodged in the esophageal stricture. Patients exper...
Striopallidodentate calcinosis: Striopallidodentate (SPD) calcinosis, a condition first described in 1930 by T. Fahr and therefore called Fahr syndrome, is a genetic (inherited) neurological disorder characterized by abnormal deposits of calcium in certain of areas of the brain (including the basal ...
Stripping: Surgery to treat varicose veins. The problematic veins are "stripped" out by passing a flexible device through the vein and removing it through an incision near the groin. Smaller tributaries of these veins also are stripped with this device or removed through a series of small incisions....
Stroke: The sudden death of some brain cells due to a lack of oxygen when the blood flow to the brain is impaired by blockage or rupture of an artery to the brain. A stroke is also called a cerebrovascular accident or, for short, a CVA.
Symptoms of a stroke depend on the area of the brain
Stroke index: A cardiodynamic measure. Stroke volume is the amount of blood the left ventricle ejects in one beat, measured in milliliters per beat (ml/beat). The stroke volume can be indexed to a patient's body size by dividing by the body surface area to yield the stroke index....
Stroke volume: The amount of blood pumped by the left ventricle of the heart in one contraction.
The stroke volume is not all of the blood contained in the left ventricle. The heart does not pump all the blood out of the ventricle. Normally, only about two-thirds of the blood in the ventricle is put...
Stroke, heat: Heat stroke can be LIFE-THREATENING! Victims of heat stroke almost always die, so immediate medical attention is essential when problems first begin. A person with heat stroke has a body temperature above 104° F. Other symptoms may include confusion, combativeness, bizarre behavio...
Stroke, National Institute Neurological Disorders
Stroke, National Institute of Neurological
Disorders and (NINDS): One of the National
Institutes of Health in the U.S., the NINDS's mission is to
"support and conduct research and research training on the
normal structure and function of the nervous system and on
the causes, prevention, diagn...
Stroke, silent: Small strokes that do not cause any symptoms. Silent strokes still damage brain tissue. The most common symptom of a stroke is weakness or paralysis on one side of the body or the other. There may be a partial or complete loss of voluntary movement and/or sensation in a leg and/or a...